[sysprof: 10/63] libsysprof-capture: Use C11 types instead of GLib types



commit 2c2cbf6343f0cc88bfdb8c7a4023efc8808ff419
Author: Philip Withnall <withnall endlessm com>
Date:   Wed Jul 1 15:04:51 2020 +0100

    libsysprof-capture: Use C11 types instead of GLib types
    
    This is an almost entirely mechanical* conversion from (for example)
    `gint` → `int`, `guint8` → `uint8_t`, etc.
    
    It is not entirely complete, as many GLib functions are still used in
    libsysprof-capture, which necessitate some use of GLib types.
    
    It also avoids renaming `gboolean` → `bool` as that’s a slightly more
    controversial change which will happen in the following commit.
    
    *Code was manually realigned afterwards.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    Helps: #40

 src/libsysprof-capture/mapped-ring-buffer.c        |  73 ++---
 src/libsysprof-capture/mapped-ring-buffer.h        |  23 +-
 src/libsysprof-capture/sysprof-address.c           |   2 +-
 src/libsysprof-capture/sysprof-address.h           |  10 +-
 src/libsysprof-capture/sysprof-capture-condition.c |  60 ++--
 src/libsysprof-capture/sysprof-capture-condition.h |  16 +-
 src/libsysprof-capture/sysprof-capture-cursor.c    |   8 +-
 src/libsysprof-capture/sysprof-capture-cursor.h    |   4 +-
 src/libsysprof-capture/sysprof-capture-reader.c    | 151 +++++-----
 src/libsysprof-capture/sysprof-capture-reader.h    |  22 +-
 src/libsysprof-capture/sysprof-capture-types.h     | 135 +++++----
 .../sysprof-capture-util-private.h                 |   2 +-
 src/libsysprof-capture/sysprof-capture-util.c      |   2 +-
 .../sysprof-capture-writer-cat.c                   |  63 ++--
 src/libsysprof-capture/sysprof-capture-writer.c    | 333 +++++++++++----------
 src/libsysprof-capture/sysprof-capture-writer.h    | 191 ++++++------
 src/libsysprof-capture/sysprof-clock.c             |   6 +-
 src/libsysprof-capture/sysprof-clock.h             |   7 +-
 src/libsysprof-capture/sysprof-collector.c         |  68 ++---
 src/libsysprof-capture/sysprof-collector.h         |  28 +-
 src/libsysprof-capture/sysprof-platform.c          |   4 +-
 src/libsysprof-capture/sysprof-platform.h          |   7 +-
 22 files changed, 616 insertions(+), 599 deletions(-)
---
diff --git a/src/libsysprof-capture/mapped-ring-buffer.c b/src/libsysprof-capture/mapped-ring-buffer.c
index ebc3ee9..a364ba8 100644
--- a/src/libsysprof-capture/mapped-ring-buffer.c
+++ b/src/libsysprof-capture/mapped-ring-buffer.c
@@ -22,6 +22,7 @@
 
 #include "config.h"
 
+#include <stdint.h>
 #include <sys/mman.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -32,7 +33,7 @@
 #include "mapped-ring-buffer.h"
 
 #define DEFAULT_N_PAGES 32
-#define BUFFER_MAX_SIZE ((G_MAXUINT32/2)-_sysprof_getpagesize())
+#define BUFFER_MAX_SIZE ((UINT32_MAX/2)-_sysprof_getpagesize())
 
 enum {
   MODE_READER    = 1,
@@ -47,10 +48,10 @@ enum {
  */
 typedef struct _MappedRingHeader
 {
-  guint32 head;
-  guint32 tail;
-  guint32 offset;
-  guint32 size;
+  uint32_t head;
+  uint32_t tail;
+  uint32_t offset;
+  uint32_t size;
 } MappedRingHeader;
 
 G_STATIC_ASSERT (sizeof (MappedRingHeader) == 16);
@@ -61,12 +62,12 @@ G_STATIC_ASSERT (sizeof (MappedRingHeader) == 16);
  */
 struct _MappedRingBuffer
 {
-  volatile gint ref_count;
+  volatile int  ref_count;
   int           mode;
   int           fd;
   void         *map;
-  gsize         body_size;
-  gsize         page_size;
+  size_t        body_size;
+  size_t        page_size;
 };
 
 static inline MappedRingHeader *
@@ -75,19 +76,19 @@ get_header (MappedRingBuffer *self)
   return (MappedRingHeader *)self->map;
 }
 
-static inline gpointer
+static inline void *
 get_body_at_pos (MappedRingBuffer *self,
-                 gsize             pos)
+                 size_t            pos)
 {
   g_assert (pos < (self->body_size + self->body_size));
 
-  return (guint8 *)self->map + self->page_size + pos;
+  return (uint8_t *)self->map + self->page_size + pos;
 }
 
-static gpointer
-map_head_and_body_twice (int   fd,
-                         gsize head_size,
-                         gsize body_size)
+static void *
+map_head_and_body_twice (int    fd,
+                         size_t head_size,
+                         size_t body_size)
 {
   void *map;
   void *second;
@@ -118,7 +119,7 @@ map_head_and_body_twice (int   fd,
    * By mmap()'ing over the old region, the previous region is automatically
    * munmap()'d for us.
    */
-  second = mmap ((guint8 *)map + head_size + body_size,
+  second = mmap ((uint8_t *)map + head_size + body_size,
                  body_size,
                  PROT_READ | PROT_WRITE,
                  MAP_SHARED | MAP_FIXED,
@@ -131,7 +132,7 @@ map_head_and_body_twice (int   fd,
       return NULL;
     }
 
-  g_assert (second == (gpointer)((guint8 *)map + head_size + body_size));
+  g_assert (second == (void *)((uint8_t *)map + head_size + body_size));
 
   return map;
 }
@@ -157,11 +158,11 @@ map_head_and_body_twice (int   fd,
  * Returns: (transfer full): a #MappedRingBuffer
  */
 MappedRingBuffer *
-mapped_ring_buffer_new_reader (gsize buffer_size)
+mapped_ring_buffer_new_reader (size_t buffer_size)
 {
   MappedRingBuffer *self;
   MappedRingHeader *header;
-  gsize page_size;
+  size_t page_size;
   void *map;
   int fd;
 
@@ -212,7 +213,7 @@ mapped_ring_buffer_new_reader (gsize buffer_size)
 }
 
 MappedRingBuffer *
-mapped_ring_buffer_new_readwrite (gsize buffer_size)
+mapped_ring_buffer_new_readwrite (size_t buffer_size)
 {
   MappedRingBuffer *self;
 
@@ -234,12 +235,12 @@ mapped_ring_buffer_new_readwrite (gsize buffer_size)
  * Returns: (transfer full) (nullable): a new #MappedRingBuffer
  */
 MappedRingBuffer *
-mapped_ring_buffer_new_writer (gint fd)
+mapped_ring_buffer_new_writer (int fd)
 {
   MappedRingBuffer *self;
   MappedRingHeader *header;
-  gssize buffer_size;
-  gsize page_size;
+  ssize_t buffer_size;
+  size_t page_size;
   void *map;
 
   g_return_val_if_fail (fd > -1, NULL);
@@ -346,7 +347,7 @@ mapped_ring_buffer_ref (MappedRingBuffer *self)
   return self;
 }
 
-gint
+int
 mapped_ring_buffer_get_fd (MappedRingBuffer *self)
 {
   g_return_val_if_fail (self != NULL, -1);
@@ -377,13 +378,13 @@ mapped_ring_buffer_get_fd (MappedRingBuffer *self)
  * Returns: (nullable): a pointer to data of at least @length bytes
  *   or %NULL if there is not enough space.
  */
-gpointer
+void *
 mapped_ring_buffer_allocate (MappedRingBuffer *self,
-                             gsize             length)
+                             size_t            length)
 {
   MappedRingHeader *header;
-  gsize headpos;
-  gsize tailpos;
+  uint32_t headpos;
+  uint32_t tailpos;
 
   g_return_val_if_fail (self != NULL, NULL);
   g_return_val_if_fail (self->mode & MODE_WRITER, NULL);
@@ -436,10 +437,10 @@ mapped_ring_buffer_allocate (MappedRingBuffer *self,
  */
 void
 mapped_ring_buffer_advance (MappedRingBuffer *self,
-                            gsize             length)
+                            size_t            length)
 {
   MappedRingHeader *header;
-  guint32 tail;
+  uint32_t tail;
 
   g_return_if_fail (self != NULL);
   g_return_if_fail (self->mode & MODE_WRITER);
@@ -480,11 +481,11 @@ mapped_ring_buffer_advance (MappedRingBuffer *self,
 gboolean
 mapped_ring_buffer_drain (MappedRingBuffer         *self,
                           MappedRingBufferCallback  callback,
-                          gpointer                  user_data)
+                          void                     *user_data)
 {
   MappedRingHeader *header;
-  gsize headpos;
-  gsize tailpos;
+  uint32_t headpos;
+  uint32_t tailpos;
 
   g_return_val_if_fail (self != NULL, FALSE);
   g_return_val_if_fail (self->mode & MODE_READER, FALSE);
@@ -510,8 +511,8 @@ mapped_ring_buffer_drain (MappedRingBuffer         *self,
 
   while (headpos < tailpos)
     {
-      gconstpointer data = get_body_at_pos (self, headpos);
-      gsize len = tailpos - headpos;
+      const void *data = get_body_at_pos (self, headpos);
+      size_t len = tailpos - headpos;
 
       if (!callback (data, &len, user_data))
         return FALSE;
@@ -545,7 +546,7 @@ gboolean
 mapped_ring_buffer_is_empty (MappedRingBuffer *self)
 {
   MappedRingHeader *header;
-  guint32 headpos, tailpos;
+  uint32_t headpos, tailpos;
 
   header = get_header (self);
 
diff --git a/src/libsysprof-capture/mapped-ring-buffer.h b/src/libsysprof-capture/mapped-ring-buffer.h
index 19740e1..15d9a00 100644
--- a/src/libsysprof-capture/mapped-ring-buffer.h
+++ b/src/libsysprof-capture/mapped-ring-buffer.h
@@ -21,6 +21,7 @@
 #pragma once
 
 #include <glib.h>
+#include <stddef.h>
 
 G_BEGIN_DECLS
 
@@ -49,18 +50,18 @@ typedef struct _MappedRingBuffer MappedRingBuffer;
  *
  * Returns: %TRUE to coninue draining, otherwise %FALSE and draining stops
  */
-typedef gboolean (*MappedRingBufferCallback) (gconstpointer  data,
-                                              gsize         *length,
-                                              gpointer       user_data);
+typedef gboolean (*MappedRingBufferCallback) (const void    *data,
+                                              size_t        *length,
+                                              void          *user_data);
 
 G_GNUC_INTERNAL
-MappedRingBuffer *mapped_ring_buffer_new_reader         (gsize                     buffer_size);
+MappedRingBuffer *mapped_ring_buffer_new_reader         (size_t                    buffer_size);
 G_GNUC_INTERNAL
-MappedRingBuffer *mapped_ring_buffer_new_readwrite      (gsize                     buffer_size);
+MappedRingBuffer *mapped_ring_buffer_new_readwrite      (size_t                    buffer_size);
 G_GNUC_INTERNAL
-MappedRingBuffer *mapped_ring_buffer_new_writer         (gint                      fd);
+MappedRingBuffer *mapped_ring_buffer_new_writer         (int                       fd);
 G_GNUC_INTERNAL
-gint              mapped_ring_buffer_get_fd             (MappedRingBuffer         *self);
+int               mapped_ring_buffer_get_fd             (MappedRingBuffer         *self);
 G_GNUC_INTERNAL
 MappedRingBuffer *mapped_ring_buffer_ref                (MappedRingBuffer         *self);
 G_GNUC_INTERNAL
@@ -68,15 +69,15 @@ void              mapped_ring_buffer_unref              (MappedRingBuffer
 G_GNUC_INTERNAL
 void              mapped_ring_buffer_clear              (MappedRingBuffer         *self);
 G_GNUC_INTERNAL
-gpointer          mapped_ring_buffer_allocate           (MappedRingBuffer         *self,
-                                                         gsize                     length);
+void             *mapped_ring_buffer_allocate           (MappedRingBuffer         *self,
+                                                         size_t                    length);
 G_GNUC_INTERNAL
 void              mapped_ring_buffer_advance            (MappedRingBuffer         *self,
-                                                         gsize                     length);
+                                                         size_t                    length);
 G_GNUC_INTERNAL
 gboolean          mapped_ring_buffer_drain              (MappedRingBuffer         *self,
                                                          MappedRingBufferCallback  callback,
-                                                         gpointer                  user_data);
+                                                         void                     *user_data);
 G_GNUC_INTERNAL
 gboolean          mapped_ring_buffer_is_empty           (MappedRingBuffer         *self);
 
diff --git a/src/libsysprof-capture/sysprof-address.c b/src/libsysprof-capture/sysprof-address.c
index e600962..8d2fc06 100644
--- a/src/libsysprof-capture/sysprof-address.c
+++ b/src/libsysprof-capture/sysprof-address.c
@@ -105,7 +105,7 @@ sysprof_address_is_context_switch (SysprofAddress         address,
     }
 }
 
-const gchar *
+const char *
 sysprof_address_context_to_string (SysprofAddressContext context)
 {
   switch (context)
diff --git a/src/libsysprof-capture/sysprof-address.h b/src/libsysprof-capture/sysprof-address.h
index 88cb5b7..ece0a99 100644
--- a/src/libsysprof-capture/sysprof-address.h
+++ b/src/libsysprof-capture/sysprof-address.h
@@ -56,13 +56,15 @@
 
 #pragma once
 
+#include <stdint.h>
+
 #include "sysprof-version-macros.h"
 
 G_BEGIN_DECLS
 
-typedef guint64 SysprofAddress;
+typedef uint64_t SysprofAddress;
 
-G_STATIC_ASSERT (sizeof (SysprofAddress) >= sizeof (gpointer));
+G_STATIC_ASSERT (sizeof (SysprofAddress) >= sizeof (void *));
 
 typedef enum
 {
@@ -79,9 +81,9 @@ SYSPROF_AVAILABLE_IN_ALL
 gboolean     sysprof_address_is_context_switch (SysprofAddress         address,
                                                 SysprofAddressContext *context);
 SYSPROF_AVAILABLE_IN_ALL
-const gchar *sysprof_address_context_to_string (SysprofAddressContext  context);
+const char  *sysprof_address_context_to_string (SysprofAddressContext  context);
 
-static inline gint
+static inline int
 sysprof_address_compare (SysprofAddress a,
                          SysprofAddress b)
 {
diff --git a/src/libsysprof-capture/sysprof-capture-condition.c 
b/src/libsysprof-capture/sysprof-capture-condition.c
index 78fb036..aaa8126 100644
--- a/src/libsysprof-capture/sysprof-capture-condition.c
+++ b/src/libsysprof-capture/sysprof-capture-condition.c
@@ -86,13 +86,13 @@ typedef enum
 
 struct _SysprofCaptureCondition
 {
-  volatile gint ref_count;
+  volatile int ref_count;
   SysprofCaptureConditionType type;
   union {
     GArray *where_type_in;
     struct {
-      gint64 begin;
-      gint64 end;
+      int64_t begin;
+      int64_t end;
     } where_time_between;
     GArray *where_pid_in;
     GArray *where_counter_in;
@@ -100,7 +100,7 @@ struct _SysprofCaptureCondition
       SysprofCaptureCondition *left;
       SysprofCaptureCondition *right;
     } and, or;
-    gchar *where_file;
+    char *where_file;
   } u;
 };
 
@@ -122,7 +122,7 @@ sysprof_capture_condition_match (const SysprofCaptureCondition *self,
              sysprof_capture_condition_match (self->u.or.right, frame);
 
     case SYSPROF_CAPTURE_CONDITION_WHERE_TYPE_IN:
-      for (guint i = 0; i < self->u.where_type_in->len; i++)
+      for (size_t i = 0; i < self->u.where_type_in->len; i++)
         {
           if (frame->type == g_array_index (self->u.where_type_in, SysprofCaptureFrameType, i))
             return TRUE;
@@ -133,9 +133,9 @@ sysprof_capture_condition_match (const SysprofCaptureCondition *self,
       return (frame->time >= self->u.where_time_between.begin && frame->time <= 
self->u.where_time_between.end);
 
     case SYSPROF_CAPTURE_CONDITION_WHERE_PID_IN:
-      for (guint i = 0; i < self->u.where_pid_in->len; i++)
+      for (size_t i = 0; i < self->u.where_pid_in->len; i++)
         {
-          if (frame->pid == g_array_index (self->u.where_pid_in, gint32, i))
+          if (frame->pid == g_array_index (self->u.where_pid_in, int32_t, i))
             return TRUE;
         }
       return FALSE;
@@ -145,11 +145,11 @@ sysprof_capture_condition_match (const SysprofCaptureCondition *self,
         {
           const SysprofCaptureCounterSet *set = (SysprofCaptureCounterSet *)frame;
 
-          for (guint i = 0; i < self->u.where_counter_in->len; i++)
+          for (size_t i = 0; i < self->u.where_counter_in->len; i++)
             {
-              guint counter = g_array_index (self->u.where_counter_in, guint, i);
+              unsigned int counter = g_array_index (self->u.where_counter_in, unsigned int, i);
 
-              for (guint j = 0; j < set->n_values; j++)
+              for (unsigned int j = 0; j < set->n_values; j++)
                 {
                   if (counter == set->values[j].ids[0] ||
                       counter == set->values[j].ids[1] ||
@@ -167,11 +167,11 @@ sysprof_capture_condition_match (const SysprofCaptureCondition *self,
         {
           const SysprofCaptureCounterDefine *def = (SysprofCaptureCounterDefine *)frame;
 
-          for (guint i = 0; i < self->u.where_counter_in->len; i++)
+          for (size_t i = 0; i < self->u.where_counter_in->len; i++)
             {
-              guint counter = g_array_index (self->u.where_counter_in, guint, i);
+              unsigned int counter = g_array_index (self->u.where_counter_in, unsigned int, i);
 
-              for (guint j = 0; j < def->n_counters; j++)
+              for (unsigned int j = 0; j < def->n_counters; j++)
                 {
                   if (def->counters[j].id == counter)
                     return TRUE;
@@ -225,7 +225,7 @@ sysprof_capture_condition_copy (const SysprofCaptureCondition *self)
     case SYSPROF_CAPTURE_CONDITION_WHERE_TYPE_IN:
       return sysprof_capture_condition_new_where_type_in (
           self->u.where_type_in->len,
-          (const SysprofCaptureFrameType *)(gpointer)self->u.where_type_in->data);
+          (const SysprofCaptureFrameType *)(void *)self->u.where_type_in->data);
 
     case SYSPROF_CAPTURE_CONDITION_WHERE_TIME_BETWEEN:
       return sysprof_capture_condition_new_where_time_between (
@@ -235,12 +235,12 @@ sysprof_capture_condition_copy (const SysprofCaptureCondition *self)
     case SYSPROF_CAPTURE_CONDITION_WHERE_PID_IN:
       return sysprof_capture_condition_new_where_pid_in (
           self->u.where_pid_in->len,
-          (const gint32 *)(gpointer)self->u.where_pid_in->data);
+          (const int32_t *)(void *)self->u.where_pid_in->data);
 
     case SYSPROF_CAPTURE_CONDITION_WHERE_COUNTER_IN:
       return sysprof_capture_condition_new_where_counter_in (
           self->u.where_counter_in->len,
-          (const guint *)(gpointer)self->u.where_counter_in->data);
+          (const unsigned int *)(void *)self->u.where_counter_in->data);
 
     case SYSPROF_CAPTURE_CONDITION_WHERE_FILE:
       return sysprof_capture_condition_new_where_file (self->u.where_file);
@@ -315,8 +315,8 @@ sysprof_capture_condition_unref (SysprofCaptureCondition *self)
 }
 
 SysprofCaptureCondition *
-sysprof_capture_condition_new_where_type_in (guint                     n_types,
-                                        const SysprofCaptureFrameType *types)
+sysprof_capture_condition_new_where_type_in (unsigned int                   n_types,
+                                             const SysprofCaptureFrameType *types)
 {
   SysprofCaptureCondition *self;
 
@@ -332,14 +332,14 @@ sysprof_capture_condition_new_where_type_in (guint                     n_types,
 }
 
 SysprofCaptureCondition *
-sysprof_capture_condition_new_where_time_between (gint64 begin_time,
-                                             gint64 end_time)
+sysprof_capture_condition_new_where_time_between (int64_t begin_time,
+                                                  int64_t end_time)
 {
   SysprofCaptureCondition *self;
 
   if G_UNLIKELY (begin_time > end_time)
     {
-      gint64 tmp = begin_time;
+      int64_t tmp = begin_time;
       begin_time = end_time;
       end_time = tmp;
     }
@@ -353,8 +353,8 @@ sysprof_capture_condition_new_where_time_between (gint64 begin_time,
 }
 
 SysprofCaptureCondition *
-sysprof_capture_condition_new_where_pid_in (guint         n_pids,
-                                       const gint32 *pids)
+sysprof_capture_condition_new_where_pid_in (unsigned int   n_pids,
+                                            const int32_t *pids)
 {
   SysprofCaptureCondition *self;
 
@@ -362,16 +362,16 @@ sysprof_capture_condition_new_where_pid_in (guint         n_pids,
 
   self = sysprof_capture_condition_init ();
   self->type = SYSPROF_CAPTURE_CONDITION_WHERE_PID_IN;
-  self->u.where_pid_in = g_array_sized_new (FALSE, FALSE, sizeof (gint32), n_pids);
+  self->u.where_pid_in = g_array_sized_new (FALSE, FALSE, sizeof (int32_t), n_pids);
   g_array_set_size (self->u.where_pid_in, n_pids);
-  memcpy (self->u.where_pid_in->data, pids, sizeof (gint32) * n_pids);
+  memcpy (self->u.where_pid_in->data, pids, sizeof (int32_t) * n_pids);
 
   return self;
 }
 
 SysprofCaptureCondition *
-sysprof_capture_condition_new_where_counter_in (guint        n_counters,
-                                           const guint *counters)
+sysprof_capture_condition_new_where_counter_in (unsigned int        n_counters,
+                                                const unsigned int *counters)
 {
   SysprofCaptureCondition *self;
 
@@ -379,12 +379,12 @@ sysprof_capture_condition_new_where_counter_in (guint        n_counters,
 
   self = sysprof_capture_condition_init ();
   self->type = SYSPROF_CAPTURE_CONDITION_WHERE_COUNTER_IN;
-  self->u.where_counter_in = g_array_sized_new (FALSE, FALSE, sizeof (guint), n_counters);
+  self->u.where_counter_in = g_array_sized_new (FALSE, FALSE, sizeof (unsigned int), n_counters);
 
   if (n_counters > 0)
     {
       g_array_set_size (self->u.where_counter_in, n_counters);
-      memcpy (self->u.where_counter_in->data, counters, sizeof (guint) * n_counters);
+      memcpy (self->u.where_counter_in->data, counters, sizeof (unsigned int) * n_counters);
     }
 
   return self;
@@ -454,7 +454,7 @@ sysprof_capture_condition_new_or (SysprofCaptureCondition *left,
  * Returns: (transfer full): a new #SysprofCaptureCondition
  */
 SysprofCaptureCondition *
-sysprof_capture_condition_new_where_file (const gchar *path)
+sysprof_capture_condition_new_where_file (const char *path)
 {
   SysprofCaptureCondition *self;
 
diff --git a/src/libsysprof-capture/sysprof-capture-condition.h 
b/src/libsysprof-capture/sysprof-capture-condition.h
index 33c356c..8792449 100644
--- a/src/libsysprof-capture/sysprof-capture-condition.h
+++ b/src/libsysprof-capture/sysprof-capture-condition.h
@@ -74,19 +74,19 @@ SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureCondition *sysprof_capture_condition_new_or                 (SysprofCaptureCondition       
*left,
                                                                            SysprofCaptureCondition       
*right);
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureCondition *sysprof_capture_condition_new_where_type_in      (guint                          
n_types,
+SysprofCaptureCondition *sysprof_capture_condition_new_where_type_in      (unsigned int                   
n_types,
                                                                            const SysprofCaptureFrameType 
*types);
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureCondition *sysprof_capture_condition_new_where_time_between (gint64                         
begin_time,
-                                                                           gint64                         
end_time);
+SysprofCaptureCondition *sysprof_capture_condition_new_where_time_between (int64_t                        
begin_time,
+                                                                           int64_t                        
end_time);
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureCondition *sysprof_capture_condition_new_where_pid_in       (guint                          
n_pids,
-                                                                           const gint32                  
*pids);
+SysprofCaptureCondition *sysprof_capture_condition_new_where_pid_in       (unsigned int                   
n_pids,
+                                                                           const int32_t                 
*pids);
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureCondition *sysprof_capture_condition_new_where_counter_in   (guint                          
n_counters,
-                                                                           const guint                   
*counters);
+SysprofCaptureCondition *sysprof_capture_condition_new_where_counter_in   (unsigned int                   
n_counters,
+                                                                           const unsigned int            
*counters);
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureCondition *sysprof_capture_condition_new_where_file         (const gchar                   
*path);
+SysprofCaptureCondition *sysprof_capture_condition_new_where_file         (const char                    
*path);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean                 sysprof_capture_condition_match                  (const SysprofCaptureCondition 
*self,
                                                                            const SysprofCaptureFrame     
*frame);
diff --git a/src/libsysprof-capture/sysprof-capture-cursor.c b/src/libsysprof-capture/sysprof-capture-cursor.c
index d2d014f..b854a6c 100644
--- a/src/libsysprof-capture/sysprof-capture-cursor.c
+++ b/src/libsysprof-capture/sysprof-capture-cursor.c
@@ -68,10 +68,10 @@ typedef const SysprofCaptureFrame *(*ReadDelegate) (SysprofCaptureReader *);
 
 struct _SysprofCaptureCursor
 {
-  volatile gint         ref_count;
+  volatile int          ref_count;
   GPtrArray            *conditions;
   SysprofCaptureReader *reader;
-  guint                 reversed : 1;
+  unsigned int          reversed : 1;
 };
 
 static void
@@ -138,7 +138,7 @@ sysprof_capture_cursor_unref (SysprofCaptureCursor *self)
 void
 sysprof_capture_cursor_foreach (SysprofCaptureCursor         *self,
                                 SysprofCaptureCursorCallback  callback,
-                                gpointer                      user_data)
+                                void                         *user_data)
 {
   g_return_if_fail (self != NULL);
   g_return_if_fail (self->reader != NULL);
@@ -231,7 +231,7 @@ sysprof_capture_cursor_foreach (SysprofCaptureCursor         *self,
         }
       else
         {
-          for (guint i = 0; i < self->conditions->len; i++)
+          for (size_t i = 0; i < self->conditions->len; i++)
             {
               const SysprofCaptureCondition *condition = g_ptr_array_index (self->conditions, i);
 
diff --git a/src/libsysprof-capture/sysprof-capture-cursor.h b/src/libsysprof-capture/sysprof-capture-cursor.h
index 13ef791..8b2c059 100644
--- a/src/libsysprof-capture/sysprof-capture-cursor.h
+++ b/src/libsysprof-capture/sysprof-capture-cursor.h
@@ -75,7 +75,7 @@ typedef struct _SysprofCaptureCursor SysprofCaptureCursor;
  * Returns: %TRUE if iteration should continue, otherwise %FALSE.
  */
 typedef gboolean (*SysprofCaptureCursorCallback) (const SysprofCaptureFrame *frame,
-                                                  gpointer                   user_data);
+                                                  void                      *user_data);
 
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureCursor *sysprof_capture_cursor_new           (SysprofCaptureReader         *reader);
@@ -88,7 +88,7 @@ SysprofCaptureReader *sysprof_capture_cursor_get_reader    (SysprofCaptureCursor
 SYSPROF_AVAILABLE_IN_ALL
 void                  sysprof_capture_cursor_foreach       (SysprofCaptureCursor         *self,
                                                             SysprofCaptureCursorCallback  callback,
-                                                            gpointer                      user_data);
+                                                            void                         *user_data);
 SYSPROF_AVAILABLE_IN_ALL
 void                  sysprof_capture_cursor_reset         (SysprofCaptureCursor         *self);
 SYSPROF_AVAILABLE_IN_ALL
diff --git a/src/libsysprof-capture/sysprof-capture-reader.c b/src/libsysprof-capture/sysprof-capture-reader.c
index ed15762..4cf634b 100644
--- a/src/libsysprof-capture/sysprof-capture-reader.c
+++ b/src/libsysprof-capture/sysprof-capture-reader.c
@@ -60,6 +60,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <limits.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -71,19 +72,19 @@
 
 struct _SysprofCaptureReader
 {
-  volatile gint             ref_count;
-  gchar                    *filename;
-  guint8                   *buf;
-  gsize                     bufsz;
-  gsize                     len;
-  gsize                     pos;
-  gsize                     fd_off;
+  volatile int              ref_count;
+  char                     *filename;
+  uint8_t                  *buf;
+  size_t                    bufsz;
+  size_t                    len;
+  size_t                    pos;
+  size_t                    fd_off;
   int                       fd;
-  gint                      endian;
+  int                       endian;
   SysprofCaptureFileHeader  header;
-  gint64                    end_time;
+  int64_t                   end_time;
   SysprofCaptureStat        st_buf;
-  guint                     st_buf_set : 1;
+  unsigned int              st_buf_set : 1;
 };
 
 static gboolean
@@ -129,7 +130,7 @@ sysprof_capture_reader_finalize (SysprofCaptureReader *self)
     }
 }
 
-const gchar *
+const char *
 sysprof_capture_reader_get_time (SysprofCaptureReader *self)
 {
   g_return_val_if_fail (self != NULL, NULL);
@@ -137,7 +138,7 @@ sysprof_capture_reader_get_time (SysprofCaptureReader *self)
   return self->header.capture_time;
 }
 
-const gchar *
+const char *
 sysprof_capture_reader_get_filename (SysprofCaptureReader *self)
 {
   g_return_val_if_fail (self != NULL, NULL);
@@ -154,7 +155,7 @@ sysprof_capture_reader_discover_end_time (SysprofCaptureReader *self)
 
   while (sysprof_capture_reader_peek_frame (self, &frame))
     {
-      gint64 end_time = frame.time;
+      int64_t end_time = frame.time;
 
       switch (frame.type)
         {
@@ -215,7 +216,7 @@ sysprof_capture_reader_new_from_fd (int      fd,
 
   self = g_new0 (SysprofCaptureReader, 1);
   self->ref_count = 1;
-  self->bufsz = G_MAXUSHORT * 2;
+  self->bufsz = USHRT_MAX * 2;
   self->buf = g_malloc (self->bufsz);
   self->len = 0;
   self->pos = 0;
@@ -244,7 +245,7 @@ sysprof_capture_reader_new_from_fd (int      fd,
 }
 
 SysprofCaptureReader *
-sysprof_capture_reader_new (const gchar  *filename,
+sysprof_capture_reader_new (const char   *filename,
                             GError      **error)
 {
   SysprofCaptureReader *self;
@@ -350,7 +351,7 @@ sysprof_capture_reader_bswap_jitmap (SysprofCaptureReader *self,
 
 static gboolean
 sysprof_capture_reader_ensure_space_for (SysprofCaptureReader *self,
-                                         gsize                 len)
+                                         size_t                len)
 {
   g_assert (self != NULL);
   g_assert (self->pos <= self->len);
@@ -361,7 +362,7 @@ sysprof_capture_reader_ensure_space_for (SysprofCaptureReader *self,
 
   if ((self->len - self->pos) < len)
     {
-      gssize r;
+      ssize_t r;
 
       if (self->len > self->pos)
         memmove (self->buf, &self->buf[self->pos], self->len - self->pos);
@@ -401,7 +402,7 @@ sysprof_capture_reader_skip (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof (SysprofCaptureFrame)))
     return FALSE;
 
-  frame = (SysprofCaptureFrame *)(gpointer)&self->buf[self->pos];
+  frame = (SysprofCaptureFrame *)(void *)&self->buf[self->pos];
   sysprof_capture_reader_bswap_frame (self, frame);
 
   if (frame->len < sizeof (SysprofCaptureFrame))
@@ -410,7 +411,7 @@ sysprof_capture_reader_skip (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, frame->len))
     return FALSE;
 
-  frame = (SysprofCaptureFrame *)(gpointer)&self->buf[self->pos];
+  frame = (SysprofCaptureFrame *)(void *)&self->buf[self->pos];
 
   self->pos += frame->len;
 
@@ -436,7 +437,7 @@ sysprof_capture_reader_peek_frame (SysprofCaptureReader *self,
 
   g_assert ((self->pos % SYSPROF_CAPTURE_ALIGN) == 0);
 
-  real_frame = (SysprofCaptureFrame *)(gpointer)&self->buf[self->pos];
+  real_frame = (SysprofCaptureFrame *)(void *)&self->buf[self->pos];
 
   *frame = *real_frame;
 
@@ -472,10 +473,10 @@ sysprof_capture_reader_peek_type (SysprofCaptureReader    *self,
 static const SysprofCaptureFrame *
 sysprof_capture_reader_read_basic (SysprofCaptureReader    *self,
                                    SysprofCaptureFrameType  type,
-                                   gsize                    extra)
+                                   size_t                   extra)
 {
   SysprofCaptureFrame *frame;
-  gsize len = sizeof *frame + extra;
+  size_t len = sizeof *frame + extra;
 
   g_assert (self != NULL);
   g_assert ((self->pos % SYSPROF_CAPTURE_ALIGN) == 0);
@@ -484,7 +485,7 @@ sysprof_capture_reader_read_basic (SysprofCaptureReader    *self,
   if (!sysprof_capture_reader_ensure_space_for (self, len))
     return NULL;
 
-  frame = (SysprofCaptureFrame *)(gpointer)&self->buf[self->pos];
+  frame = (SysprofCaptureFrame *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, frame);
 
@@ -524,7 +525,7 @@ sysprof_capture_reader_read_fork (SysprofCaptureReader *self)
   g_assert (self != NULL);
 
   fk = (SysprofCaptureFork *)
-    sysprof_capture_reader_read_basic (self, SYSPROF_CAPTURE_FRAME_FORK, sizeof(guint32));
+    sysprof_capture_reader_read_basic (self, SYSPROF_CAPTURE_FRAME_FORK, sizeof (uint32_t));
 
   if (fk != NULL)
     {
@@ -547,7 +548,7 @@ sysprof_capture_reader_read_map (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *map))
     return NULL;
 
-  map = (SysprofCaptureMap *)(gpointer)&self->buf[self->pos];
+  map = (SysprofCaptureMap *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &map->frame);
 
@@ -560,7 +561,7 @@ sysprof_capture_reader_read_map (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, map->frame.len))
     return NULL;
 
-  map = (SysprofCaptureMap *)(gpointer)&self->buf[self->pos];
+  map = (SysprofCaptureMap *)(void *)&self->buf[self->pos];
 
   if (self->buf[self->pos + map->frame.len - 1] != '\0')
     return NULL;
@@ -587,7 +588,7 @@ sysprof_capture_reader_read_log (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *log))
     return NULL;
 
-  log = (SysprofCaptureLog *)(gpointer)&self->buf[self->pos];
+  log = (SysprofCaptureLog *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &log->frame);
 
@@ -600,7 +601,7 @@ sysprof_capture_reader_read_log (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, log->frame.len))
     return NULL;
 
-  log = (SysprofCaptureLog *)(gpointer)&self->buf[self->pos];
+  log = (SysprofCaptureLog *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_log (self, log);
 
@@ -612,7 +613,7 @@ sysprof_capture_reader_read_log (SysprofCaptureReader *self)
   /* Ensure trailing \0 in domain and message */
   log->domain[sizeof log->domain - 1] = 0;
   if (log->frame.len > sizeof *log)
-    ((gchar *)log)[log->frame.len - 1] = 0;
+    ((char *)log)[log->frame.len - 1] = 0;
 
   return log;
 }
@@ -629,7 +630,7 @@ sysprof_capture_reader_read_mark (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *mark))
     return NULL;
 
-  mark = (SysprofCaptureMark *)(gpointer)&self->buf[self->pos];
+  mark = (SysprofCaptureMark *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &mark->frame);
 
@@ -642,7 +643,7 @@ sysprof_capture_reader_read_mark (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, mark->frame.len))
     return NULL;
 
-  mark = (SysprofCaptureMark *)(gpointer)&self->buf[self->pos];
+  mark = (SysprofCaptureMark *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_mark (self, mark);
 
@@ -654,7 +655,7 @@ sysprof_capture_reader_read_mark (SysprofCaptureReader *self)
   /* Ensure trailing \0 in name and message */
   mark->name[sizeof mark->name - 1] = 0;
   if (mark->frame.len > sizeof *mark)
-    ((gchar *)mark)[mark->frame.len - 1] = 0;
+    ((char *)mark)[mark->frame.len - 1] = 0;
 
   /* Maybe update end-time */
   if G_UNLIKELY ((mark->frame.time + mark->duration) > self->end_time)
@@ -675,7 +676,7 @@ sysprof_capture_reader_read_metadata (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *metadata))
     return NULL;
 
-  metadata = (SysprofCaptureMetadata *)(gpointer)&self->buf[self->pos];
+  metadata = (SysprofCaptureMetadata *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &metadata->frame);
 
@@ -688,7 +689,7 @@ sysprof_capture_reader_read_metadata (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, metadata->frame.len))
     return NULL;
 
-  metadata = (SysprofCaptureMetadata *)(gpointer)&self->buf[self->pos];
+  metadata = (SysprofCaptureMetadata *)(void *)&self->buf[self->pos];
 
   self->pos += metadata->frame.len;
 
@@ -698,7 +699,7 @@ sysprof_capture_reader_read_metadata (SysprofCaptureReader *self)
   /* Ensure trailing \0 in .id and .metadata */
   metadata->id[sizeof metadata->id - 1] = 0;
   if (metadata->frame.len > sizeof *metadata)
-    ((gchar *)metadata)[metadata->frame.len - 1] = 0;
+    ((char *)metadata)[metadata->frame.len - 1] = 0;
 
   return metadata;
 }
@@ -715,7 +716,7 @@ sysprof_capture_reader_read_process (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *process))
     return NULL;
 
-  process = (SysprofCaptureProcess *)(gpointer)&self->buf[self->pos];
+  process = (SysprofCaptureProcess *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &process->frame);
 
@@ -728,7 +729,7 @@ sysprof_capture_reader_read_process (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, process->frame.len))
     return NULL;
 
-  process = (SysprofCaptureProcess *)(gpointer)&self->buf[self->pos];
+  process = (SysprofCaptureProcess *)(void *)&self->buf[self->pos];
 
   if (self->buf[self->pos + process->frame.len - 1] != '\0')
     return NULL;
@@ -746,9 +747,9 @@ sysprof_capture_reader_read_jitmap (SysprofCaptureReader *self)
 {
   g_autoptr(GHashTable) ret = NULL;
   SysprofCaptureJitmap *jitmap;
-  guint8 *buf;
-  guint8 *endptr;
-  guint i;
+  uint8_t *buf;
+  uint8_t *endptr;
+  unsigned int i;
 
   g_assert (self != NULL);
   g_assert ((self->pos % SYSPROF_CAPTURE_ALIGN) == 0);
@@ -757,7 +758,7 @@ sysprof_capture_reader_read_jitmap (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *jitmap))
     return NULL;
 
-  jitmap = (SysprofCaptureJitmap *)(gpointer)&self->buf[self->pos];
+  jitmap = (SysprofCaptureJitmap *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &jitmap->frame);
 
@@ -780,7 +781,7 @@ sysprof_capture_reader_read_jitmap (SysprofCaptureReader *self)
   for (i = 0; i < jitmap->n_jitmaps; i++)
     {
       SysprofCaptureAddress addr;
-      const gchar *str;
+      const char *str;
 
       if (buf + sizeof addr >= endptr)
         return NULL;
@@ -788,7 +789,7 @@ sysprof_capture_reader_read_jitmap (SysprofCaptureReader *self)
       memcpy (&addr, buf, sizeof addr);
       buf += sizeof addr;
 
-      str = (gchar *)buf;
+      str = (char *)buf;
 
       buf = memchr (buf, '\0', (endptr - buf));
 
@@ -819,7 +820,7 @@ sysprof_capture_reader_read_sample (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *sample))
     return NULL;
 
-  sample = (SysprofCaptureSample *)(gpointer)&self->buf[self->pos];
+  sample = (SysprofCaptureSample *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &sample->frame);
 
@@ -838,11 +839,11 @@ sysprof_capture_reader_read_sample (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sample->frame.len))
     return NULL;
 
-  sample = (SysprofCaptureSample *)(gpointer)&self->buf[self->pos];
+  sample = (SysprofCaptureSample *)(void *)&self->buf[self->pos];
 
   if (G_UNLIKELY (self->endian != G_BYTE_ORDER))
     {
-      guint i;
+      unsigned int i;
 
       for (i = 0; i < sample->n_addrs; i++)
         sample->addrs[i] = GUINT64_SWAP_LE_BE (sample->addrs[i]);
@@ -865,7 +866,7 @@ sysprof_capture_reader_read_counter_define (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *def))
     return NULL;
 
-  def = (SysprofCaptureCounterDefine *)(gpointer)&self->buf[self->pos];
+  def = (SysprofCaptureCounterDefine *)(void *)&self->buf[self->pos];
 
   if (def->frame.type != SYSPROF_CAPTURE_FRAME_CTRDEF)
     return NULL;
@@ -882,11 +883,11 @@ sysprof_capture_reader_read_counter_define (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, def->frame.len))
     return NULL;
 
-  def = (SysprofCaptureCounterDefine *)(gpointer)&self->buf[self->pos];
+  def = (SysprofCaptureCounterDefine *)(void *)&self->buf[self->pos];
 
   if (G_UNLIKELY (self->endian != G_BYTE_ORDER))
     {
-      guint i;
+      unsigned int i;
 
       for (i = 0; i < def->n_counters; i++)
         {
@@ -912,7 +913,7 @@ sysprof_capture_reader_read_counter_set (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *set))
     return NULL;
 
-  set = (SysprofCaptureCounterSet *)(gpointer)&self->buf[self->pos];
+  set = (SysprofCaptureCounterSet *)(void *)&self->buf[self->pos];
 
   if (set->frame.type != SYSPROF_CAPTURE_FRAME_CTRSET)
     return NULL;
@@ -929,15 +930,15 @@ sysprof_capture_reader_read_counter_set (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, set->frame.len))
     return NULL;
 
-  set = (SysprofCaptureCounterSet *)(gpointer)&self->buf[self->pos];
+  set = (SysprofCaptureCounterSet *)(void *)&self->buf[self->pos];
 
   if (G_UNLIKELY (self->endian != G_BYTE_ORDER))
     {
-      guint i;
+      unsigned int i;
 
       for (i = 0; i < set->n_values; i++)
         {
-          guint j;
+          unsigned int j;
 
           for (j = 0; j < G_N_ELEMENTS (set->values[0].values); j++)
             {
@@ -1026,12 +1027,12 @@ sysprof_capture_reader_splice (SysprofCaptureReader  *self,
  */
 gboolean
 sysprof_capture_reader_save_as (SysprofCaptureReader  *self,
-                                const gchar           *filename,
+                                const char            *filename,
                                 GError               **error)
 {
   struct stat stbuf;
   off_t in_off;
-  gsize to_write;
+  size_t to_write;
   int fd = -1;
 
   g_assert (self != NULL);
@@ -1054,7 +1055,7 @@ sysprof_capture_reader_save_as (SysprofCaptureReader  *self,
 
   while (to_write > 0)
     {
-      gssize written;
+      ssize_t written;
 
       written = _sysprof_sendfile (fd, self->fd, &in_off, to_write);
 
@@ -1064,7 +1065,7 @@ sysprof_capture_reader_save_as (SysprofCaptureReader  *self,
       if (written == 0 && errno != EAGAIN)
         goto handle_errno;
 
-      g_assert (written <= (gssize)to_write);
+      g_assert (written <= (ssize_t)to_write);
 
       to_write -= written;
     }
@@ -1088,7 +1089,7 @@ handle_errno:
   return FALSE;
 }
 
-gint64
+int64_t
 sysprof_capture_reader_get_start_time (SysprofCaptureReader *self)
 {
   g_return_val_if_fail (self != NULL, 0);
@@ -1114,10 +1115,10 @@ sysprof_capture_reader_get_start_time (SysprofCaptureReader *self)
  *
  * Since: 3.22.1
  */
-gint64
+int64_t
 sysprof_capture_reader_get_end_time (SysprofCaptureReader *self)
 {
-  gint64 end_time = 0;
+  int64_t end_time = 0;
 
   g_return_val_if_fail (self != NULL, 0);
 
@@ -1212,7 +1213,7 @@ sysprof_capture_reader_read_file (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *file_chunk))
     return NULL;
 
-  file_chunk = (SysprofCaptureFileChunk *)(gpointer)&self->buf[self->pos];
+  file_chunk = (SysprofCaptureFileChunk *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &file_chunk->frame);
 
@@ -1225,7 +1226,7 @@ sysprof_capture_reader_read_file (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, file_chunk->frame.len))
     return NULL;
 
-  file_chunk = (SysprofCaptureFileChunk *)(gpointer)&self->buf[self->pos];
+  file_chunk = (SysprofCaptureFileChunk *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_file_chunk (self, file_chunk);
 
@@ -1244,7 +1245,7 @@ sysprof_capture_reader_read_file (SysprofCaptureReader *self)
   return file_chunk;
 }
 
-gchar **
+char **
 sysprof_capture_reader_list_files (SysprofCaptureReader *self)
 {
   g_autoptr(GHashTable) files = NULL;
@@ -1280,13 +1281,13 @@ sysprof_capture_reader_list_files (SysprofCaptureReader *self)
     g_ptr_array_add (ar, g_strdup (key));
   g_ptr_array_add (ar, NULL);
 
-  return (gchar **)g_ptr_array_free (g_steal_pointer (&ar), FALSE);
+  return (char **)g_ptr_array_free (g_steal_pointer (&ar), FALSE);
 }
 
 gboolean
 sysprof_capture_reader_read_file_fd (SysprofCaptureReader *self,
-                                     const gchar          *path,
-                                     gint                  fd)
+                                     const char           *path,
+                                     int                   fd)
 {
   g_assert (self != NULL);
   g_assert (path != NULL);
@@ -1296,8 +1297,8 @@ sysprof_capture_reader_read_file_fd (SysprofCaptureReader *self,
     {
       SysprofCaptureFrameType type;
       const SysprofCaptureFileChunk *file;
-      const guint8 *buf;
-      gsize to_write;
+      const uint8_t *buf;
+      size_t to_write;
 
       if (!sysprof_capture_reader_peek_type (self, &type))
         return FALSE;
@@ -1316,7 +1317,7 @@ sysprof_capture_reader_read_file_fd (SysprofCaptureReader *self,
 
       while (to_write > 0)
         {
-          gssize written;
+          ssize_t written;
 
           written = _sysprof_write (fd, buf, to_write);
           if (written < 0)
@@ -1325,7 +1326,7 @@ sysprof_capture_reader_read_file_fd (SysprofCaptureReader *self,
           if (written == 0 && errno != EAGAIN)
             return FALSE;
 
-          g_assert (written <= (gssize)to_write);
+          g_assert (written <= (ssize_t)to_write);
 
           buf += written;
           to_write -= written;
@@ -1344,7 +1345,7 @@ sysprof_capture_reader_read_file_fd (SysprofCaptureReader *self,
   g_return_val_if_reached (FALSE);
 }
 
-gint
+int
 sysprof_capture_reader_get_byte_order (SysprofCaptureReader *self)
 {
   g_return_val_if_fail (self != NULL, 0);
@@ -1354,7 +1355,7 @@ sysprof_capture_reader_get_byte_order (SysprofCaptureReader *self)
 
 const SysprofCaptureFileChunk *
 sysprof_capture_reader_find_file (SysprofCaptureReader *self,
-                                  const gchar          *path)
+                                  const char           *path)
 {
   SysprofCaptureFrameType type;
 
@@ -1395,7 +1396,7 @@ sysprof_capture_reader_read_allocation (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, sizeof *ma))
     return NULL;
 
-  ma = (SysprofCaptureAllocation *)(gpointer)&self->buf[self->pos];
+  ma = (SysprofCaptureAllocation *)(void *)&self->buf[self->pos];
 
   sysprof_capture_reader_bswap_frame (self, &ma->frame);
 
@@ -1419,11 +1420,11 @@ sysprof_capture_reader_read_allocation (SysprofCaptureReader *self)
   if (!sysprof_capture_reader_ensure_space_for (self, ma->frame.len))
     return NULL;
 
-  ma = (SysprofCaptureAllocation *)(gpointer)&self->buf[self->pos];
+  ma = (SysprofCaptureAllocation *)(void *)&self->buf[self->pos];
 
   if (G_UNLIKELY (self->endian != G_BYTE_ORDER))
     {
-      for (guint i = 0; i < ma->n_addrs; i++)
+      for (unsigned int i = 0; i < ma->n_addrs; i++)
         ma->addrs[i] = GUINT64_SWAP_LE_BE (ma->addrs[i]);
     }
 
diff --git a/src/libsysprof-capture/sysprof-capture-reader.h b/src/libsysprof-capture/sysprof-capture-reader.h
index 9c732b0..0934858 100644
--- a/src/libsysprof-capture/sysprof-capture-reader.h
+++ b/src/libsysprof-capture/sysprof-capture-reader.h
@@ -64,7 +64,7 @@ G_BEGIN_DECLS
 typedef struct _SysprofCaptureReader SysprofCaptureReader;
 
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureReader               *sysprof_capture_reader_new                 (const gchar               
*filename,
+SysprofCaptureReader               *sysprof_capture_reader_new                 (const char                
*filename,
                                                                                 GError                   
**error);
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureReader               *sysprof_capture_reader_new_from_fd         (int                        
fd,
@@ -76,15 +76,15 @@ SysprofCaptureReader               *sysprof_capture_reader_ref                 (
 SYSPROF_AVAILABLE_IN_ALL
 void                                sysprof_capture_reader_unref               (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
-gint                                sysprof_capture_reader_get_byte_order      (SysprofCaptureReader      
*self);
+int                                 sysprof_capture_reader_get_byte_order      (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
-const gchar                        *sysprof_capture_reader_get_filename        (SysprofCaptureReader      
*self);
+const char                         *sysprof_capture_reader_get_filename        (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
-const gchar                        *sysprof_capture_reader_get_time            (SysprofCaptureReader      
*self);
+const char                         *sysprof_capture_reader_get_time            (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
-gint64                              sysprof_capture_reader_get_start_time      (SysprofCaptureReader      
*self);
+int64_t                             sysprof_capture_reader_get_start_time      (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
-gint64                              sysprof_capture_reader_get_end_time        (SysprofCaptureReader      
*self);
+int64_t                             sysprof_capture_reader_get_end_time        (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean                            sysprof_capture_reader_skip                (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
@@ -129,7 +129,7 @@ gboolean                            sysprof_capture_reader_splice              (
                                                                                 GError                   
**error);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean                            sysprof_capture_reader_save_as             (SysprofCaptureReader      
*self,
-                                                                                const gchar               
*filename,
+                                                                                const char                
*filename,
                                                                                 GError                   
**error);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean                            sysprof_capture_reader_get_stat            (SysprofCaptureReader      
*self,
@@ -139,13 +139,13 @@ void                                sysprof_capture_reader_set_stat            (
                                                                                 const SysprofCaptureStat  
*st_buf);
 SYSPROF_AVAILABLE_IN_ALL
 const SysprofCaptureFileChunk      *sysprof_capture_reader_find_file           (SysprofCaptureReader      
*self,
-                                                                                const gchar               
*path);
+                                                                                const char                
*path);
 SYSPROF_AVAILABLE_IN_ALL
-gchar                             **sysprof_capture_reader_list_files          (SysprofCaptureReader      
*self);
+char                              **sysprof_capture_reader_list_files          (SysprofCaptureReader      
*self);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean                            sysprof_capture_reader_read_file_fd        (SysprofCaptureReader      
*self,
-                                                                                const gchar               
*path,
-                                                                                gint                       
fd);
+                                                                                const char                
*path,
+                                                                                int                        
fd);
 
 
 G_END_DECLS
diff --git a/src/libsysprof-capture/sysprof-capture-types.h b/src/libsysprof-capture/sysprof-capture-types.h
index fab5ba1..05f36c4 100644
--- a/src/libsysprof-capture/sysprof-capture-types.h
+++ b/src/libsysprof-capture/sysprof-capture-types.h
@@ -57,6 +57,9 @@
 #pragma once
 
 #include <glib.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdint.h>
 
 #include "sysprof-clock.h"
 
@@ -92,25 +95,25 @@ typedef struct _SysprofCaptureWriter    SysprofCaptureWriter;
 typedef struct _SysprofCaptureCursor    SysprofCaptureCursor;
 typedef struct _SysprofCaptureCondition SysprofCaptureCondition;
 
-typedef guint64 SysprofCaptureAddress;
+typedef uint64_t SysprofCaptureAddress;
 
 typedef struct
 {
   /*
    * The number of frames indexed by SysprofCaptureFrameType
    */
-  gsize frame_count[16];
+  size_t frame_count[16];
 
   /*
    * Padding for future expansion.
    */
-  gsize padding[48];
+  size_t padding[48];
 } SysprofCaptureStat;
 
 typedef union
 {
-  gint64  v64;
-  gdouble vdbl;
+  int64_t v64;
+  double  vdbl;
 } SysprofCaptureCounterValue;
 
 typedef enum
@@ -137,28 +140,28 @@ typedef enum
 SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
-  guint32 magic;
-  guint32 version : 8;
-  guint32 little_endian : 1;
-  guint32 padding : 23;
-  gchar   capture_time[64];
-  gint64  time;
-  gint64  end_time;
-  gchar   suffix[168];
+  uint32_t magic;
+  uint32_t version : 8;
+  uint32_t little_endian : 1;
+  uint32_t padding : 23;
+  char     capture_time[64];
+  int64_t  time;
+  int64_t  end_time;
+  char     suffix[168];
 } SysprofCaptureFileHeader
 SYSPROF_ALIGNED_END(1);
 
 SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
-  guint16 len;
-  gint16  cpu;
-  gint32  pid;
-  gint64  time;
-  guint32 type : 8;
-  guint32 padding1 : 24;
-  guint32 padding2;
-  guint8  data[0];
+  uint16_t len;
+  int16_t  cpu;
+  int32_t  pid;
+  int64_t  time;
+  uint32_t type : 8;
+  uint32_t padding1 : 24;
+  uint32_t padding2;
+  uint8_t  data[0];
 } SysprofCaptureFrame
 SYSPROF_ALIGNED_END(1);
 
@@ -166,11 +169,11 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  guint64             start;
-  guint64             end;
-  guint64             offset;
-  guint64             inode;
-  gchar               filename[0];
+  uint64_t            start;
+  uint64_t            end;
+  uint64_t            offset;
+  uint64_t            inode;
+  char                filename[0];
 } SysprofCaptureMap
 SYSPROF_ALIGNED_END(1);
 
@@ -178,8 +181,8 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  guint32             n_jitmaps;
-  guint8              data[0];
+  uint32_t            n_jitmaps;
+  uint8_t             data[0];
 } SysprofCaptureJitmap
 SYSPROF_ALIGNED_END(1);
 
@@ -187,7 +190,7 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  gchar               cmdline[0];
+  char                cmdline[0];
 } SysprofCaptureProcess
 SYSPROF_ALIGNED_END(1);
 
@@ -195,9 +198,9 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame   frame;
-  guint32               n_addrs : 16;
-  guint32               padding1 : 16;
-  gint32                tid;
+  uint32_t              n_addrs : 16;
+  uint32_t              padding1 : 16;
+  int32_t               tid;
   SysprofCaptureAddress addrs[0];
 } SysprofCaptureSample
 SYSPROF_ALIGNED_END(1);
@@ -206,7 +209,7 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  gint32              child_pid;
+  int32_t             child_pid;
 } SysprofCaptureFork
 SYSPROF_ALIGNED_END(1);
 
@@ -227,11 +230,11 @@ SYSPROF_ALIGNED_END(1);
 SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
-  gchar                      category[32];
-  gchar                      name[32];
-  gchar                      description[52];
-  guint32                    id : 24;
-  guint32                    type : 8;
+  char                       category[32];
+  char                       name[32];
+  char                       description[52];
+  uint32_t                   id : 24;
+  uint32_t                   type : 8;
   SysprofCaptureCounterValue value;
 } SysprofCaptureCounter
 SYSPROF_ALIGNED_END(1);
@@ -240,9 +243,9 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame   frame;
-  guint32               n_counters : 16;
-  guint32               padding1 : 16;
-  guint32               padding2;
+  uint32_t              n_counters : 16;
+  uint32_t              padding1 : 16;
+  uint32_t              padding2;
   SysprofCaptureCounter counters[0];
 } SysprofCaptureCounterDefine
 SYSPROF_ALIGNED_END(1);
@@ -255,7 +258,7 @@ typedef struct
    * bytes.  So this makes a nice 2-cacheline aligned size which is
    * useful when the number of counters is rather small.
    */
-  guint32                    ids[8];
+  uint32_t                   ids[8];
   SysprofCaptureCounterValue values[8];
 } SysprofCaptureCounterValues
 SYSPROF_ALIGNED_END(1);
@@ -264,9 +267,9 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame         frame;
-  guint32                     n_values : 16;
-  guint32                     padding1 : 16;
-  guint32                     padding2;
+  uint32_t                    n_values : 16;
+  uint32_t                    padding1 : 16;
+  uint32_t                    padding2;
   SysprofCaptureCounterValues values[0];
 } SysprofCaptureCounterSet
 SYSPROF_ALIGNED_END(1);
@@ -275,10 +278,10 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  gint64              duration;
-  gchar               group[24];
-  gchar               name[40];
-  gchar               message[0];
+  int64_t             duration;
+  char                group[24];
+  char                name[40];
+  char                message[0];
 } SysprofCaptureMark
 SYSPROF_ALIGNED_END(1);
 
@@ -286,8 +289,8 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  gchar               id[40];
-  gchar               metadata[0];
+  char                id[40];
+  char                metadata[0];
 } SysprofCaptureMetadata
 SYSPROF_ALIGNED_END(1);
 
@@ -295,11 +298,11 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  guint32             severity : 16;
-  guint32             padding1 : 16;
-  guint32             padding2 : 32;
-  gchar               domain[32];
-  gchar               message[0];
+  uint32_t            severity : 16;
+  uint32_t            padding1 : 16;
+  uint32_t            padding2 : 32;
+  char                domain[32];
+  char                message[0];
 } SysprofCaptureLog
 SYSPROF_ALIGNED_END(1);
 
@@ -307,11 +310,11 @@ SYSPROF_ALIGNED_BEGIN(1)
 typedef struct
 {
   SysprofCaptureFrame frame;
-  guint32             is_last : 1;
-  guint32             padding1 : 15;
-  guint32             len : 16;
-  gchar               path[256];
-  guint8              data[0];
+  uint32_t            is_last : 1;
+  uint32_t            padding1 : 15;
+  uint32_t            len : 16;
+  char                path[256];
+  uint8_t             data[0];
 } SysprofCaptureFileChunk
 SYSPROF_ALIGNED_END(1);
 
@@ -320,10 +323,10 @@ typedef struct
 {
   SysprofCaptureFrame   frame;
   SysprofCaptureAddress alloc_addr;
-  gint64                alloc_size;
-  gint32                tid;
-  guint32               n_addrs : 16;
-  guint32               padding1 : 16;
+  int64_t               alloc_size;
+  int32_t               tid;
+  uint32_t              n_addrs : 16;
+  uint32_t              padding1 : 16;
   SysprofCaptureAddress addrs[0];
 } SysprofCaptureAllocation
 SYSPROF_ALIGNED_END(1);
@@ -350,7 +353,7 @@ G_STATIC_ASSERT (sizeof (SysprofCaptureAllocation) == 48);
 G_STATIC_ASSERT ((G_STRUCT_OFFSET (SysprofCaptureAllocation, addrs) % SYSPROF_CAPTURE_ALIGN) == 0);
 G_STATIC_ASSERT ((G_STRUCT_OFFSET (SysprofCaptureSample, addrs) % SYSPROF_CAPTURE_ALIGN) == 0);
 
-static inline gint
+static inline int
 sysprof_capture_address_compare (SysprofCaptureAddress a,
                                  SysprofCaptureAddress b)
 {
diff --git a/src/libsysprof-capture/sysprof-capture-util-private.h 
b/src/libsysprof-capture/sysprof-capture-util-private.h
index 5350a17..26ba79e 100644
--- a/src/libsysprof-capture/sysprof-capture-util-private.h
+++ b/src/libsysprof-capture/sysprof-capture-util-private.h
@@ -84,7 +84,7 @@ ssize_t _sysprof_pwrite      (int         fd,
 ssize_t _sysprof_write       (int         fd,
                               const void *buf,
                               size_t      count);
-gint32  _sysprof_getpid      (void);
+int32_t _sysprof_getpid      (void);
 ssize_t _sysprof_sendfile    (int         out_fd,
                               int         in_fd,
                               off_t      *offset,
diff --git a/src/libsysprof-capture/sysprof-capture-util.c b/src/libsysprof-capture/sysprof-capture-util.c
index 58336e7..4571b4d 100644
--- a/src/libsysprof-capture/sysprof-capture-util.c
+++ b/src/libsysprof-capture/sysprof-capture-util.c
@@ -157,7 +157,7 @@ ssize_t
 #endif
 }
 
-gint32
+int32_t
 (_sysprof_getpid) (void)
 {
 #ifdef G_OS_WIN32
diff --git a/src/libsysprof-capture/sysprof-capture-writer-cat.c 
b/src/libsysprof-capture/sysprof-capture-writer-cat.c
index 0e473f4..504835a 100644
--- a/src/libsysprof-capture/sysprof-capture-writer-cat.c
+++ b/src/libsysprof-capture/sysprof-capture-writer-cat.c
@@ -59,14 +59,15 @@
 #include "config.h"
 
 #include <glib/gstdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <sysprof-capture.h>
 #include <unistd.h>
 
 typedef struct
 {
-  guint64 src;
-  guint64 dst;
+  uint64_t src;
+  uint64_t dst;
 } TranslateItem;
 
 enum {
@@ -76,15 +77,15 @@ enum {
 };
 
 static void
-translate_table_clear (GArray **tables,
-                       guint    table)
+translate_table_clear (GArray       **tables,
+                       unsigned int   table)
 {
   g_clear_pointer (&tables[table], g_array_unref);
 }
 
-static gint
-compare_by_src (gconstpointer a,
-                gconstpointer b)
+static int
+compare_by_src (const void *a,
+                const void *b)
 {
   const TranslateItem *itema = a;
   const TranslateItem *itemb = b;
@@ -98,18 +99,18 @@ compare_by_src (gconstpointer a,
 }
 
 static void
-translate_table_sort (GArray **tables,
-                      guint    table)
+translate_table_sort (GArray       **tables,
+                      unsigned int   table)
 {
   if (tables[table])
     g_array_sort (tables[table], compare_by_src);
 }
 
 static void
-translate_table_add (GArray  **tables,
-                     guint     table,
-                     guint64   src,
-                     guint64   dst)
+translate_table_add (GArray       **tables,
+                     unsigned int   table,
+                     uint64_t       src,
+                     uint64_t       dst)
 {
   const TranslateItem item = { src, dst };
 
@@ -119,10 +120,10 @@ translate_table_add (GArray  **tables,
   g_array_append_val (tables[table], item);
 }
 
-static guint64
-translate_table_translate (GArray  **tables,
-                           guint     table,
-                           guint64   src)
+static uint64_t
+translate_table_translate (GArray       **tables,
+                           unsigned int   table,
+                           uint64_t       src)
 {
   const TranslateItem *item;
   TranslateItem key = { src, 0 };
@@ -152,9 +153,9 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
 {
   GArray *tables[N_TRANSLATE] = { NULL };
   SysprofCaptureFrameType type;
-  gint64 start_time;
-  gint64 first_start_time = G_MAXINT64;
-  gint64 end_time = -1;
+  int64_t start_time;
+  int64_t first_start_time = INT64_MAX;
+  int64_t end_time = -1;
 
   g_return_val_if_fail (self != NULL, FALSE);
   g_return_val_if_fail (reader != NULL, FALSE);
@@ -176,8 +177,8 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
     {
       g_autoptr(GHashTable) jitmap = NULL;
       GHashTableIter iter;
-      const gchar *name;
-      guint64 addr;
+      const char *name;
+      uint64_t addr;
 
       if (type != SYSPROF_CAPTURE_FRAME_JITMAP)
         {
@@ -192,7 +193,7 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
       g_hash_table_iter_init (&iter, jitmap);
       while (g_hash_table_iter_next (&iter, (gpointer *)&addr, (gpointer *)&name))
         {
-          guint64 replace = sysprof_capture_writer_add_jitmap (self, name);
+          uint64_t replace = sysprof_capture_writer_add_jitmap (self, name);
           /* We need to keep a table of replacement addresses so that
            * we can translate the samples into the destination address
            * space that we synthesized for the address identifier.
@@ -378,7 +379,7 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
             {
               SysprofCaptureAddress addrs[frame->n_addrs];
 
-              for (guint z = 0; z < frame->n_addrs; z++)
+              for (unsigned int z = 0; z < frame->n_addrs; z++)
                 addrs[z] = translate_table_translate (tables, TRANSLATE_ADDR, frame->addrs[z]);
 
               sysprof_capture_writer_add_sample (self,
@@ -403,10 +404,10 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
             {
               g_autoptr(GArray) counter = g_array_new (FALSE, FALSE, sizeof (SysprofCaptureCounter));
 
-              for (guint z = 0; z < frame->n_counters; z++)
+              for (unsigned int z = 0; z < frame->n_counters; z++)
                 {
                   SysprofCaptureCounter c = frame->counters[z];
-                  guint src = c.id;
+                  unsigned int src = c.id;
 
                   c.id = sysprof_capture_writer_request_counter (self, 1);
 
@@ -440,15 +441,15 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
               g_autoptr(GArray) ids = g_array_new (FALSE, FALSE, sizeof (guint));
               g_autoptr(GArray) values = g_array_new (FALSE, FALSE, sizeof (SysprofCaptureCounterValue));
 
-              for (guint z = 0; z < frame->n_values; z++)
+              for (unsigned int z = 0; z < frame->n_values; z++)
                 {
                   const SysprofCaptureCounterValues *v = &frame->values[z];
 
-                  for (guint y = 0; y < G_N_ELEMENTS (v->ids); y++)
+                  for (unsigned int y = 0; y < G_N_ELEMENTS (v->ids); y++)
                     {
                       if (v->ids[y])
                         {
-                          guint dst = translate_table_translate (tables, TRANSLATE_CTR, v->ids[y]);
+                          unsigned int dst = translate_table_translate (tables, TRANSLATE_CTR, v->ids[y]);
                           SysprofCaptureCounterValue value = v->values[y];
 
                           g_array_append_val (ids, dst);
@@ -463,8 +464,8 @@ sysprof_capture_writer_cat (SysprofCaptureWriter  *self,
                                                    frame->frame.time,
                                                    frame->frame.cpu,
                                                    frame->frame.pid,
-                                                   (const guint *)(gpointer)ids->data,
-                                                   (const SysprofCaptureCounterValue 
*)(gpointer)values->data,
+                                                   (const unsigned int *)(void *)ids->data,
+                                                   (const SysprofCaptureCounterValue *)(void *)values->data,
                                                    ids->len);
             }
 
diff --git a/src/libsysprof-capture/sysprof-capture-writer.c b/src/libsysprof-capture/sysprof-capture-writer.c
index 8e4c5a6..57c176c 100644
--- a/src/libsysprof-capture/sysprof-capture-writer.c
+++ b/src/libsysprof-capture/sysprof-capture-writer.c
@@ -65,6 +65,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <glib/gstdio.h>
+#include <limits.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
@@ -83,10 +84,10 @@
 typedef struct
 {
   /* A pinter into the string buffer */
-  const gchar *str;
+  const char *str;
 
   /* The unique address for the string */
-  guint64 addr;
+  uint64_t addr;
 } SysprofCaptureJitmapBucket;
 
 struct _SysprofCaptureWriter
@@ -98,7 +99,7 @@ struct _SysprofCaptureWriter
    *
    * This is paired with a closed hash table for deduplication.
    */
-  gchar addr_buf[4096*4];
+  char addr_buf[4096*4];
 
   /* Our hashtable for deduplication. */
   SysprofCaptureJitmapBucket addr_hash[512];
@@ -107,38 +108,38 @@ struct _SysprofCaptureWriter
    * alinged for the write buffer. This improves the performance of large
    * writes to the target file-descriptor.
    */
-  volatile gint ref_count;
+  volatile int ref_count;
 
   /*
    * Our address sequence counter. The value that comes from
    * monotonically increasing this is OR'd with JITMAP_MARK to denote
    * the address name should come from the JIT map.
    */
-  gsize addr_seq;
+  size_t addr_seq;
 
   /* Our position in addr_buf. */
-  gsize addr_buf_pos;
+  size_t addr_buf_pos;
 
   /*
    * The number of hash table items in @addr_hash. This is an
    * optimization so that we can avoid calculating the number of strings
    * when flushing out the jitmap.
    */
-  guint addr_hash_size;
+  unsigned int addr_hash_size;
 
   /* Capture file handle */
   int fd;
 
   /* Our write buffer for fd */
-  guint8 *buf;
-  gsize pos;
-  gsize len;
+  uint8_t *buf;
+  size_t pos;
+  size_t len;
 
   /* GSource for periodic flush */
   GSource *periodic_flush;
 
   /* counter id sequence */
-  gint next_counter_id;
+  int next_counter_id;
 
   /* Statistics while recording */
   SysprofCaptureStat stat;
@@ -146,10 +147,10 @@ struct _SysprofCaptureWriter
 
 static inline void
 sysprof_capture_writer_frame_init (SysprofCaptureFrame     *frame_,
-                                   gint                     len,
-                                   gint                     cpu,
-                                   gint32                   pid,
-                                   gint64                   time_,
+                                   int                      len,
+                                   int                      cpu,
+                                   int32_t                  pid,
+                                   int64_t                  time_,
                                    SysprofCaptureFrameType  type)
 {
   g_assert (frame_ != NULL);
@@ -207,9 +208,9 @@ sysprof_capture_writer_unref (SysprofCaptureWriter *self)
 static gboolean
 sysprof_capture_writer_flush_data (SysprofCaptureWriter *self)
 {
-  const guint8 *buf;
-  gssize written;
-  gsize to_write;
+  const uint8_t *buf;
+  ssize_t written;
+  size_t to_write;
 
   g_assert (self != NULL);
   g_assert (self->pos <= self->len);
@@ -230,7 +231,7 @@ sysprof_capture_writer_flush_data (SysprofCaptureWriter *self)
       if (written == 0 && errno != EAGAIN)
         return FALSE;
 
-      g_assert (written <= (gssize)to_write);
+      g_assert (written <= (ssize_t)to_write);
 
       buf += written;
       to_write -= written;
@@ -242,17 +243,17 @@ sysprof_capture_writer_flush_data (SysprofCaptureWriter *self)
 }
 
 static inline void
-sysprof_capture_writer_realign (gsize *pos)
+sysprof_capture_writer_realign (size_t *pos)
 {
   *pos = (*pos + SYSPROF_CAPTURE_ALIGN - 1) & ~(SYSPROF_CAPTURE_ALIGN - 1);
 }
 
 static inline gboolean
 sysprof_capture_writer_ensure_space_for (SysprofCaptureWriter *self,
-                                         gsize                 len)
+                                         size_t                len)
 {
   /* Check for max frame size */
-  if (len > G_MAXUSHORT)
+  if (len > USHRT_MAX)
     return FALSE;
 
   if ((self->len - self->pos) < len)
@@ -264,11 +265,11 @@ sysprof_capture_writer_ensure_space_for (SysprofCaptureWriter *self,
   return TRUE;
 }
 
-static inline gpointer
+static inline void *
 sysprof_capture_writer_allocate (SysprofCaptureWriter *self,
-                                 gsize                *len)
+                                 size_t               *len)
 {
-  gpointer p;
+  void *p;
 
   g_assert (self != NULL);
   g_assert (len != NULL);
@@ -279,7 +280,7 @@ sysprof_capture_writer_allocate (SysprofCaptureWriter *self,
   if (!sysprof_capture_writer_ensure_space_for (self, *len))
     return NULL;
 
-  p = (gpointer)&self->buf[self->pos];
+  p = (void *)&self->buf[self->pos];
 
   self->pos += *len;
 
@@ -292,8 +293,8 @@ static gboolean
 sysprof_capture_writer_flush_jitmap (SysprofCaptureWriter *self)
 {
   SysprofCaptureJitmap jitmap;
-  gssize r;
-  gsize len;
+  ssize_t r;
+  size_t len;
 
   g_assert (self != NULL);
 
@@ -318,7 +319,7 @@ sysprof_capture_writer_flush_jitmap (SysprofCaptureWriter *self)
     return FALSE;
 
   r = _sysprof_write (self->fd, self->addr_buf, len - sizeof jitmap);
-  if (r < 0 || (gsize)r != (len - sizeof jitmap))
+  if (r < 0 || (size_t)r != (len - sizeof jitmap))
     return FALSE;
 
   self->addr_buf_pos = 0;
@@ -332,11 +333,11 @@ sysprof_capture_writer_flush_jitmap (SysprofCaptureWriter *self)
 
 static gboolean
 sysprof_capture_writer_lookup_jitmap (SysprofCaptureWriter  *self,
-                                      const gchar           *name,
+                                      const char            *name,
                                       SysprofCaptureAddress *addr)
 {
-  guint hash;
-  guint i;
+  unsigned int hash;
+  unsigned int i;
 
   g_assert (self != NULL);
   g_assert (name != NULL);
@@ -377,13 +378,13 @@ sysprof_capture_writer_lookup_jitmap (SysprofCaptureWriter  *self,
 
 static SysprofCaptureAddress
 sysprof_capture_writer_insert_jitmap (SysprofCaptureWriter *self,
-                                      const gchar          *str)
+                                      const char           *str)
 {
   SysprofCaptureAddress addr;
-  gchar *dst;
-  gsize len;
-  guint hash;
-  guint i;
+  char *dst;
+  size_t len;
+  unsigned int hash;
+  unsigned int i;
 
   g_assert (self != NULL);
   g_assert (str != NULL);
@@ -408,7 +409,7 @@ sysprof_capture_writer_insert_jitmap (SysprofCaptureWriter *self,
   addr = SYSPROF_CAPTURE_JITMAP_MARK | ++self->addr_seq;
 
   /* Copy the address into the buffer */
-  dst = (gchar *)&self->addr_buf[self->addr_buf_pos];
+  dst = (char *)&self->addr_buf[self->addr_buf_pos];
   memcpy (dst, &addr, sizeof addr);
 
   /*
@@ -459,14 +460,14 @@ sysprof_capture_writer_insert_jitmap (SysprofCaptureWriter *self,
 }
 
 SysprofCaptureWriter *
-sysprof_capture_writer_new_from_fd (int   fd,
-                                    gsize buffer_size)
+sysprof_capture_writer_new_from_fd (int    fd,
+                                    size_t buffer_size)
 {
   g_autofree gchar *nowstr = NULL;
   g_autoptr(GDateTime) now = NULL;
   SysprofCaptureWriter *self;
   SysprofCaptureFileHeader *header;
-  gsize header_len = sizeof(*header);
+  size_t header_len = sizeof(*header);
 
   if (fd < 0)
     return NULL;
@@ -538,8 +539,8 @@ sysprof_capture_writer_new_from_fd (int   fd,
 }
 
 SysprofCaptureWriter *
-sysprof_capture_writer_new (const gchar *filename,
-                            gsize        buffer_size)
+sysprof_capture_writer_new (const char *filename,
+                            size_t      buffer_size)
 {
   SysprofCaptureWriter *self;
   int fd;
@@ -561,17 +562,17 @@ sysprof_capture_writer_new (const gchar *filename,
 
 gboolean
 sysprof_capture_writer_add_map (SysprofCaptureWriter *self,
-                                gint64                time,
-                                gint                  cpu,
-                                gint32                pid,
-                                guint64               start,
-                                guint64               end,
-                                guint64               offset,
-                                guint64               inode,
-                                const gchar          *filename)
+                                int64_t               time,
+                                int                   cpu,
+                                int32_t               pid,
+                                uint64_t              start,
+                                uint64_t              end,
+                                uint64_t              offset,
+                                uint64_t              inode,
+                                const char           *filename)
 {
   SysprofCaptureMap *ev;
-  gsize len;
+  size_t len;
 
   if (filename == NULL)
     filename = "";
@@ -606,17 +607,17 @@ sysprof_capture_writer_add_map (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_mark (SysprofCaptureWriter *self,
-                                 gint64                time,
-                                 gint                  cpu,
-                                 gint32                pid,
-                                 guint64               duration,
-                                 const gchar          *group,
-                                 const gchar          *name,
-                                 const gchar          *message)
+                                 int64_t               time,
+                                 int                   cpu,
+                                 int32_t               pid,
+                                 uint64_t              duration,
+                                 const char           *group,
+                                 const char           *name,
+                                 const char           *message)
 {
   SysprofCaptureMark *ev;
-  gsize message_len;
-  gsize len;
+  size_t message_len;
+  size_t len;
 
   g_assert (self != NULL);
   g_assert (name != NULL);
@@ -650,15 +651,15 @@ sysprof_capture_writer_add_mark (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_metadata (SysprofCaptureWriter *self,
-                                     gint64                time,
-                                     gint                  cpu,
-                                     gint32                pid,
-                                     const gchar          *id,
-                                     const gchar          *metadata,
-                                     gssize                metadata_len)
+                                     int64_t               time,
+                                     int                   cpu,
+                                     int32_t               pid,
+                                     const char           *id,
+                                     const char           *metadata,
+                                     ssize_t               metadata_len)
 {
   SysprofCaptureMetadata *ev;
-  gsize len;
+  size_t len;
 
   g_assert (self != NULL);
   g_assert (id != NULL);
@@ -695,7 +696,7 @@ sysprof_capture_writer_add_metadata (SysprofCaptureWriter *self,
 
 SysprofCaptureAddress
 sysprof_capture_writer_add_jitmap (SysprofCaptureWriter *self,
-                                   const gchar          *name)
+                                   const char           *name)
 {
   SysprofCaptureAddress addr = INVALID_ADDRESS;
 
@@ -713,13 +714,13 @@ sysprof_capture_writer_add_jitmap (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_process (SysprofCaptureWriter *self,
-                                    gint64                time,
-                                    gint                  cpu,
-                                    gint32                pid,
-                                    const gchar          *cmdline)
+                                    int64_t               time,
+                                    int                   cpu,
+                                    int32_t               pid,
+                                    const char           *cmdline)
 {
   SysprofCaptureProcess *ev;
-  gsize len;
+  size_t len;
 
   if (cmdline == NULL)
     cmdline = "";
@@ -750,15 +751,15 @@ sysprof_capture_writer_add_process (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_sample (SysprofCaptureWriter        *self,
-                                   gint64                       time,
-                                   gint                         cpu,
-                                   gint32                       pid,
-                                   gint32                       tid,
+                                   int64_t                      time,
+                                   int                          cpu,
+                                   int32_t                      pid,
+                                   int32_t                      tid,
                                    const SysprofCaptureAddress *addrs,
-                                   guint                        n_addrs)
+                                   unsigned int                 n_addrs)
 {
   SysprofCaptureSample *ev;
-  gsize len;
+  size_t len;
 
   g_assert (self != NULL);
 
@@ -786,13 +787,13 @@ sysprof_capture_writer_add_sample (SysprofCaptureWriter        *self,
 
 gboolean
 sysprof_capture_writer_add_fork (SysprofCaptureWriter *self,
-                                 gint64           time,
-                                 gint             cpu,
-                                 gint32           pid,
-                                 gint32           child_pid)
+                                 int64_t          time,
+                                 int              cpu,
+                                 int32_t          pid,
+                                 int32_t          child_pid)
 {
   SysprofCaptureFork *ev;
-  gsize len = sizeof *ev;
+  size_t len = sizeof *ev;
 
   g_assert (self != NULL);
 
@@ -815,12 +816,12 @@ sysprof_capture_writer_add_fork (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_exit (SysprofCaptureWriter *self,
-                                 gint64                time,
-                                 gint                  cpu,
-                                 gint32                pid)
+                                 int64_t               time,
+                                 int                   cpu,
+                                 int32_t               pid)
 {
   SysprofCaptureExit *ev;
-  gsize len = sizeof *ev;
+  size_t len = sizeof *ev;
 
   g_assert (self != NULL);
 
@@ -842,12 +843,12 @@ sysprof_capture_writer_add_exit (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_timestamp (SysprofCaptureWriter *self,
-                                      gint64                time,
-                                      gint                  cpu,
-                                      gint32                pid)
+                                      int64_t               time,
+                                      int                   cpu,
+                                      int32_t               pid)
 {
   SysprofCaptureTimestamp *ev;
-  gsize len = sizeof *ev;
+  size_t len = sizeof *ev;
 
   g_assert (self != NULL);
 
@@ -870,7 +871,7 @@ sysprof_capture_writer_add_timestamp (SysprofCaptureWriter *self,
 static gboolean
 sysprof_capture_writer_flush_end_time (SysprofCaptureWriter *self)
 {
-  gint64 end_time = SYSPROF_CAPTURE_CURRENT_TIME;
+  int64_t end_time = SYSPROF_CAPTURE_CURRENT_TIME;
   ssize_t ret;
 
   g_assert (self != NULL);
@@ -914,10 +915,10 @@ sysprof_capture_writer_flush (SysprofCaptureWriter *self)
  */
 gboolean
 sysprof_capture_writer_save_as (SysprofCaptureWriter  *self,
-                                const gchar           *filename,
+                                const char            *filename,
                                 GError               **error)
 {
-  gsize to_write;
+  size_t to_write;
   off_t in_off;
   off_t pos;
   int fd = -1;
@@ -940,7 +941,7 @@ sysprof_capture_writer_save_as (SysprofCaptureWriter  *self,
 
   while (to_write > 0)
     {
-      gssize written;
+      ssize_t written;
 
       written = _sysprof_sendfile (fd, self->fd, &in_off, pos);
 
@@ -950,7 +951,7 @@ sysprof_capture_writer_save_as (SysprofCaptureWriter  *self,
       if (written == 0 && errno != EAGAIN)
         goto handle_errno;
 
-      g_assert (written <= (gssize)to_write);
+      g_assert (written <= (ssize_t)to_write);
 
       to_write -= written;
     }
@@ -997,7 +998,7 @@ _sysprof_capture_writer_splice_from_fd (SysprofCaptureWriter  *self,
 {
   struct stat stbuf;
   off_t in_off;
-  gsize to_write;
+  size_t to_write;
 
   g_assert (self != NULL);
   g_assert (self->fd != -1);
@@ -1019,7 +1020,7 @@ _sysprof_capture_writer_splice_from_fd (SysprofCaptureWriter  *self,
 
   while (to_write > 0)
     {
-      gssize written;
+      ssize_t written;
 
       written = _sysprof_sendfile (self->fd, fd, &in_off, to_write);
 
@@ -1029,7 +1030,7 @@ _sysprof_capture_writer_splice_from_fd (SysprofCaptureWriter  *self,
       if (written == 0 && errno != EAGAIN)
         goto handle_errno;
 
-      g_assert (written <= (gssize)to_write);
+      g_assert (written <= (ssize_t)to_write);
 
       to_write -= written;
     }
@@ -1166,15 +1167,15 @@ sysprof_capture_writer_stat (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_define_counters (SysprofCaptureWriter        *self,
-                                        gint64                       time,
-                                        gint                         cpu,
-                                        gint32                       pid,
+                                        int64_t                      time,
+                                        int                          cpu,
+                                        int32_t                      pid,
                                         const SysprofCaptureCounter *counters,
-                                        guint                        n_counters)
+                                        unsigned int                 n_counters)
 {
   SysprofCaptureCounterDefine *def;
-  gsize len;
-  guint i;
+  size_t len;
+  unsigned int i;
 
   g_assert (self != NULL);
   g_assert (counters != NULL);
@@ -1216,19 +1217,19 @@ sysprof_capture_writer_define_counters (SysprofCaptureWriter        *self,
 
 gboolean
 sysprof_capture_writer_set_counters (SysprofCaptureWriter             *self,
-                                     gint64                            time,
-                                     gint                              cpu,
-                                     gint32                            pid,
-                                     const guint                      *counters_ids,
+                                     int64_t                           time,
+                                     int                               cpu,
+                                     int32_t                           pid,
+                                     const unsigned int               *counters_ids,
                                      const SysprofCaptureCounterValue *values,
-                                     guint                             n_counters)
+                                     unsigned int                      n_counters)
 {
   SysprofCaptureCounterSet *set;
-  gsize len;
-  guint n_groups;
-  guint group;
-  guint field;
-  guint i;
+  size_t len;
+  unsigned int n_groups;
+  unsigned int group;
+  unsigned int field;
+  unsigned int i;
 
   g_assert (self != NULL);
   g_assert (counters_ids != NULL || n_counters == 0);
@@ -1292,11 +1293,11 @@ sysprof_capture_writer_set_counters (SysprofCaptureWriter             *self,
  *
  * Returns: The next series of counter values or zero on failure.
  */
-guint
+unsigned int
 sysprof_capture_writer_request_counter (SysprofCaptureWriter *self,
-                                        guint                 n_counters)
+                                        unsigned int          n_counters)
 {
-  gint ret;
+  int ret;
 
   g_assert (self != NULL);
 
@@ -1311,8 +1312,8 @@ sysprof_capture_writer_request_counter (SysprofCaptureWriter *self,
 
 gboolean
 _sysprof_capture_writer_set_time_range (SysprofCaptureWriter *self,
-                                        gint64                start_time,
-                                        gint64                end_time)
+                                        int64_t               start_time,
+                                        int64_t               end_time)
 {
   ssize_t ret;
 
@@ -1340,9 +1341,9 @@ do_end:
 }
 
 SysprofCaptureWriter *
-sysprof_capture_writer_new_from_env (gsize buffer_size)
+sysprof_capture_writer_new_from_env (size_t buffer_size)
 {
-  const gchar *fdstr;
+  const char *fdstr;
   int fd;
 
   if (!(fdstr = g_getenv ("SYSPROF_TRACE_FD")))
@@ -1361,7 +1362,7 @@ sysprof_capture_writer_new_from_env (gsize buffer_size)
   return sysprof_capture_writer_new_from_fd (dup (fd), buffer_size);
 }
 
-gsize
+size_t
 sysprof_capture_writer_get_buffer_size (SysprofCaptureWriter *self)
 {
   g_return_val_if_fail (self != NULL, 0);
@@ -1371,16 +1372,16 @@ sysprof_capture_writer_get_buffer_size (SysprofCaptureWriter *self)
 
 gboolean
 sysprof_capture_writer_add_log (SysprofCaptureWriter *self,
-                                gint64                time,
-                                gint                  cpu,
-                                gint32                pid,
-                                GLogLevelFlags        severity,
-                                const gchar          *domain,
-                                const gchar          *message)
+                                int64_t               time,
+                                int                   cpu,
+                                int32_t               pid,
+                                int                   severity,
+                                const char           *domain,
+                                const char           *message)
 {
   SysprofCaptureLog *ev;
-  gsize message_len;
-  gsize len;
+  size_t message_len;
+  size_t len;
 
   g_assert (self != NULL);
 
@@ -1416,16 +1417,16 @@ sysprof_capture_writer_add_log (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_file (SysprofCaptureWriter *self,
-                                 gint64                time,
-                                 gint                  cpu,
-                                 gint32                pid,
-                                 const gchar          *path,
-                                 gboolean              is_last,
-                                 const guint8         *data,
-                                 gsize                 data_len)
+                                 int64_t               time,
+                                 int                   cpu,
+                                 int32_t               pid,
+                                 const char           *path,
+                                 bool                  is_last,
+                                 const uint8_t        *data,
+                                 size_t                data_len)
 {
   SysprofCaptureFileChunk *ev;
-  gsize len;
+  size_t len;
 
   g_assert (self != NULL);
 
@@ -1454,20 +1455,20 @@ sysprof_capture_writer_add_file (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_file_fd (SysprofCaptureWriter *self,
-                                    gint64                time,
-                                    gint                  cpu,
-                                    gint32                pid,
-                                    const gchar          *path,
-                                    gint                  fd)
+                                    int64_t               time,
+                                    int                   cpu,
+                                    int32_t               pid,
+                                    const char           *path,
+                                    int                   fd)
 {
-  guint8 data[(4096*4L) - sizeof(SysprofCaptureFileChunk)];
+  uint8_t data[(4096*4L) - sizeof(SysprofCaptureFileChunk)];
 
   g_assert (self != NULL);
 
   for (;;)
     {
       gboolean is_last;
-      gssize n_read;
+      ssize_t n_read;
 
     again:
       n_read = read (fd, data, sizeof data);
@@ -1524,18 +1525,18 @@ sysprof_capture_writer_set_flush_delay (SysprofCaptureWriter *self,
 
 gboolean
 sysprof_capture_writer_add_allocation (SysprofCaptureWriter  *self,
-                                       gint64                 time,
-                                       gint                   cpu,
-                                       gint32                 pid,
-                                       gint32                 tid,
+                                       int64_t                time,
+                                       int                    cpu,
+                                       int32_t                pid,
+                                       int32_t                tid,
                                        SysprofCaptureAddress  alloc_addr,
-                                       gint64                 alloc_size,
+                                       int64_t                alloc_size,
                                        SysprofBacktraceFunc   backtrace_func,
-                                       gpointer               backtrace_data)
+                                       void                  *backtrace_data)
 {
   SysprofCaptureAllocation *ev;
-  gsize len;
-  guint n_addrs;
+  size_t len;
+  unsigned int n_addrs;
 
   g_assert (self != NULL);
   g_assert (backtrace_func != NULL);
@@ -1565,7 +1566,7 @@ sysprof_capture_writer_add_allocation (SysprofCaptureWriter  *self,
 
   if (ev->n_addrs < MAX_UNWIND_DEPTH)
     {
-      gsize diff = (sizeof (SysprofCaptureAddress) * (MAX_UNWIND_DEPTH - ev->n_addrs));
+      size_t diff = (sizeof (SysprofCaptureAddress) * (MAX_UNWIND_DEPTH - ev->n_addrs));
 
       ev->frame.len -= diff;
       self->pos -= diff;
@@ -1578,17 +1579,17 @@ sysprof_capture_writer_add_allocation (SysprofCaptureWriter  *self,
 
 gboolean
 sysprof_capture_writer_add_allocation_copy (SysprofCaptureWriter        *self,
-                                            gint64                       time,
-                                            gint                         cpu,
-                                            gint32                       pid,
-                                            gint32                       tid,
+                                            int64_t                      time,
+                                            int                          cpu,
+                                            int32_t                      pid,
+                                            int32_t                      tid,
                                             SysprofCaptureAddress        alloc_addr,
-                                            gint64                       alloc_size,
+                                            int64_t                      alloc_size,
                                             const SysprofCaptureAddress *addrs,
-                                            guint                        n_addrs)
+                                            unsigned int                 n_addrs)
 {
   SysprofCaptureAllocation *ev;
-  gsize len;
+  size_t len;
 
   g_assert (self != NULL);
 
@@ -1624,8 +1625,8 @@ gboolean
 _sysprof_capture_writer_add_raw (SysprofCaptureWriter      *self,
                                  const SysprofCaptureFrame *fr)
 {
-  gpointer begin;
-  gsize len;
+  void *begin;
+  size_t len;
 
   g_assert (self != NULL);
   g_assert ((fr->len & 0x7) == 0);
diff --git a/src/libsysprof-capture/sysprof-capture-writer.h b/src/libsysprof-capture/sysprof-capture-writer.h
index 409e88b..a20bb82 100644
--- a/src/libsysprof-capture/sysprof-capture-writer.h
+++ b/src/libsysprof-capture/sysprof-capture-writer.h
@@ -56,6 +56,9 @@
 
 #pragma once
 
+#include <stdint.h>
+#include <sys/types.h>
+
 #include "sysprof-capture-types.h"
 #include "sysprof-version-macros.h"
 
@@ -72,20 +75,20 @@ typedef struct _SysprofCaptureWriter SysprofCaptureWriter;
  *
  * Returns: the number of addresses filled in @addrs
  */
-typedef gint (*SysprofBacktraceFunc) (SysprofCaptureAddress *addrs,
-                                      guint                  n_addrs,
-                                      gpointer               user_data);
+typedef int (*SysprofBacktraceFunc) (SysprofCaptureAddress *addrs,
+                                     unsigned int           n_addrs,
+                                     void                  *user_data);
 
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureWriter *sysprof_capture_writer_new_from_env                    (gsize                          
    buffer_size);
+SysprofCaptureWriter *sysprof_capture_writer_new_from_env                    (size_t                         
    buffer_size);
 SYSPROF_AVAILABLE_IN_ALL
-SysprofCaptureWriter *sysprof_capture_writer_new                             (const gchar                    
   *filename,
-                                                                              gsize                          
    buffer_size);
+SysprofCaptureWriter *sysprof_capture_writer_new                             (const char                     
   *filename,
+                                                                              size_t                         
    buffer_size);
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureWriter *sysprof_capture_writer_new_from_fd                     (int                            
    fd,
-                                                                              gsize                          
    buffer_size);
+                                                                              size_t                         
    buffer_size);
 SYSPROF_AVAILABLE_IN_ALL
-gsize                 sysprof_capture_writer_get_buffer_size                 (SysprofCaptureWriter           
   *self);
+size_t                sysprof_capture_writer_get_buffer_size                 (SysprofCaptureWriter           
   *self);
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureWriter *sysprof_capture_writer_ref                             (SysprofCaptureWriter           
   *self);
 SYSPROF_AVAILABLE_IN_ALL
@@ -96,135 +99,135 @@ void                  sysprof_capture_writer_stat                            (Sy
 SYSPROF_AVAILABLE_IN_ALL
 void                  sysprof_capture_writer_set_flush_delay                 (SysprofCaptureWriter           
   *self,
                                                                               GMainContext                   
   *main_context,
-                                                                              guint                          
    timeout_seconds);
+                                                                              unsigned int                   
    timeout_seconds);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_file                        (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              const gchar                    
   *path,
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              const char                     
   *path,
                                                                               gboolean                       
    is_last,
-                                                                              const guint8                   
   *data,
-                                                                              gsize                          
    data_len);
+                                                                              const uint8_t                  
   *data,
+                                                                              size_t                         
    data_len);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_file_fd                     (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              const gchar                    
   *path,
-                                                                              gint                           
    fd);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              const char                     
   *path,
+                                                                              int                            
    fd);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_map                         (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              guint64                        
    start,
-                                                                              guint64                        
    end,
-                                                                              guint64                        
    offset,
-                                                                              guint64                        
    inode,
-                                                                              const gchar                    
   *filename);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              uint64_t                       
    start,
+                                                                              uint64_t                       
    end,
+                                                                              uint64_t                       
    offset,
+                                                                              uint64_t                       
    inode,
+                                                                              const char                     
   *filename);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_mark                        (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              guint64                        
    duration,
-                                                                              const gchar                    
   *group,
-                                                                              const gchar                    
   *name,
-                                                                              const gchar                    
   *message);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              uint64_t                       
    duration,
+                                                                              const char                     
   *group,
+                                                                              const char                     
   *name,
+                                                                              const char                     
   *message);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_metadata                    (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              const gchar                    
   *id,
-                                                                              const gchar                    
   *metadata,
-                                                                              gssize                         
    metadata_len);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              const char                     
   *id,
+                                                                              const char                     
   *metadata,
+                                                                              ssize_t                        
    metadata_len);
 SYSPROF_AVAILABLE_IN_ALL
-guint64               sysprof_capture_writer_add_jitmap                      (SysprofCaptureWriter           
   *self,
-                                                                              const gchar                    
   *name);
+uint64_t              sysprof_capture_writer_add_jitmap                      (SysprofCaptureWriter           
   *self,
+                                                                              const char                     
   *name);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_process                     (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              const gchar                    
   *cmdline);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              const char                     
   *cmdline);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_sample                      (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              gint32                         
    tid,
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              int32_t                        
    tid,
                                                                               const SysprofCaptureAddress    
   *addrs,
-                                                                              guint                          
    n_addrs);
+                                                                              unsigned int                   
    n_addrs);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_fork                        (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              gint32                         
    child_pid);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              int32_t                        
    child_pid);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_exit                        (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_timestamp                   (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_define_counters                 (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
                                                                               const SysprofCaptureCounter    
   *counters,
-                                                                              guint                          
    n_counters);
+                                                                              unsigned int                   
    n_counters);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_set_counters                    (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              const guint                    
   *counters_ids,
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              const unsigned int             
   *counters_ids,
                                                                               const 
SysprofCaptureCounterValue  *values,
-                                                                              guint                          
    n_counters);
+                                                                              unsigned int                   
    n_counters);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_add_log                         (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              GLogLevelFlags                 
    severity,
-                                                                              const gchar                    
   *domain,
-                                                                              const gchar                    
   *message);
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              int                            
    severity,
+                                                                              const char                     
   *domain,
+                                                                              const char                     
   *message);
 SYSPROF_AVAILABLE_IN_3_36
 gboolean              sysprof_capture_writer_add_allocation                  (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              gint32                         
    tid,
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              int32_t                        
    tid,
                                                                               SysprofCaptureAddress          
    alloc_addr,
-                                                                              gint64                         
    alloc_size,
+                                                                              int64_t                        
    alloc_size,
                                                                               SysprofBacktraceFunc           
    backtrace_func,
-                                                                              gpointer                       
    backtrace_data);
+                                                                              void                           
   *backtrace_data);
 SYSPROF_AVAILABLE_IN_3_36
 gboolean              sysprof_capture_writer_add_allocation_copy             (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    time,
-                                                                              gint                           
    cpu,
-                                                                              gint32                         
    pid,
-                                                                              gint32                         
    tid,
+                                                                              int64_t                        
    time,
+                                                                              int                            
    cpu,
+                                                                              int32_t                        
    pid,
+                                                                              int32_t                        
    tid,
                                                                               SysprofCaptureAddress          
    alloc_addr,
-                                                                              gint64                         
    alloc_size,
+                                                                              int64_t                        
    alloc_size,
                                                                               const SysprofCaptureAddress    
   *addrs,
-                                                                              guint                          
    n_addrs);
+                                                                              unsigned int                   
    n_addrs);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_flush                           (SysprofCaptureWriter           
   *self);
 SYSPROF_AVAILABLE_IN_ALL
 gboolean              sysprof_capture_writer_save_as                         (SysprofCaptureWriter           
   *self,
-                                                                              const gchar                    
   *filename,
+                                                                              const char                     
   *filename,
                                                                               GError                         
  **error);
 SYSPROF_AVAILABLE_IN_ALL
-guint                 sysprof_capture_writer_request_counter                 (SysprofCaptureWriter           
   *self,
-                                                                              guint                          
    n_counters);
+unsigned int          sysprof_capture_writer_request_counter                 (SysprofCaptureWriter           
   *self,
+                                                                              unsigned int                   
    n_counters);
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureReader *sysprof_capture_writer_create_reader                   (SysprofCaptureWriter           
   *self,
                                                                               GError                         
  **error);
@@ -245,8 +248,8 @@ gboolean              _sysprof_capture_writer_splice_from_fd                 (Sy
                                                                               GError                         
  **error) G_GNUC_INTERNAL;
 G_GNUC_INTERNAL
 gboolean              _sysprof_capture_writer_set_time_range                 (SysprofCaptureWriter           
   *self,
-                                                                              gint64                         
    start_time,
-                                                                              gint64                         
    end_time) G_GNUC_INTERNAL;
+                                                                              int64_t                        
    start_time,
+                                                                              int64_t                        
    end_time) G_GNUC_INTERNAL;
 
 
 G_END_DECLS
diff --git a/src/libsysprof-capture/sysprof-clock.c b/src/libsysprof-capture/sysprof-clock.c
index 066605c..f517dee 100644
--- a/src/libsysprof-capture/sysprof-clock.c
+++ b/src/libsysprof-capture/sysprof-clock.c
@@ -60,12 +60,12 @@
 
 #include "sysprof-clock.h"
 
-gint sysprof_clock = -1;
+int sysprof_clock = -1;
 
 void
 sysprof_clock_init (void)
 {
-  static const gint clock_ids[] = {
+  static const int clock_ids[] = {
     CLOCK_MONOTONIC,
     CLOCK_MONOTONIC_RAW,
 #ifdef __linux__
@@ -78,7 +78,7 @@ sysprof_clock_init (void)
   if (sysprof_clock != -1)
     return;
 
-  for (guint i = 0; i < G_N_ELEMENTS (clock_ids); i++)
+  for (unsigned int i = 0; i < G_N_ELEMENTS (clock_ids); i++)
     {
       struct timespec ts;
       int clock_id = clock_ids [i];
diff --git a/src/libsysprof-capture/sysprof-clock.h b/src/libsysprof-capture/sysprof-clock.h
index ac101a3..fba81a4 100644
--- a/src/libsysprof-capture/sysprof-clock.h
+++ b/src/libsysprof-capture/sysprof-clock.h
@@ -57,15 +57,16 @@
 #pragma once
 
 #include <glib.h>
+#include <stdint.h>
 #include <time.h>
 
 #include "sysprof-version-macros.h"
 
 G_BEGIN_DECLS
 
-typedef gint SysprofClock;
-typedef gint64 SysprofTimeStamp;
-typedef gint32 SysprofTimeSysprofan;
+typedef int SysprofClock;
+typedef int64_t SysprofTimeStamp;
+typedef int32_t SysprofTimeSysprofan;
 
 #define SYSPROF_NSEC_PER_SEC G_GINT64_CONSTANT(1000000000)
 
diff --git a/src/libsysprof-capture/sysprof-collector.c b/src/libsysprof-capture/sysprof-collector.c
index 064586d..29e7431 100644
--- a/src/libsysprof-capture/sysprof-collector.c
+++ b/src/libsysprof-capture/sysprof-collector.c
@@ -87,10 +87,10 @@ typedef struct
   int pid;
 } SysprofCollector;
 
-#define COLLECTOR_INVALID ((gpointer)&invalid)
+#define COLLECTOR_INVALID ((void *)&invalid)
 
 static MappedRingBuffer       *request_writer         (void);
-static void                    sysprof_collector_free (gpointer data);
+static void                    sysprof_collector_free (void *data);
 static const SysprofCollector *sysprof_collector_get  (void);
 
 static G_LOCK_DEFINE (control_fd);
@@ -115,8 +115,8 @@ _do_getcpu (void)
 #endif
 }
 
-static inline gsize
-realign (gsize size)
+static inline size_t
+realign (size_t size)
 {
   return (size + SYSPROF_CAPTURE_ALIGN - 1) & ~(SYSPROF_CAPTURE_ALIGN - 1);
 }
@@ -129,7 +129,7 @@ request_writer (void)
 
   if (conn == NULL)
     {
-      const gchar *fdstr = g_getenv ("SYSPROF_CONTROL_FD");
+      const char *fdstr = g_getenv ("SYSPROF_CONTROL_FD");
       int peer_fd = -1;
 
       if (fdstr != NULL)
@@ -166,7 +166,7 @@ request_writer (void)
       if (g_output_stream_write_all (G_OUTPUT_STREAM (out_stream), CREATRING, CREATRING_LEN, &len, NULL, 
NULL) &&
           len == CREATRING_LEN)
         {
-          gint ring_fd = g_unix_connection_receive_fd (conn, NULL, NULL);
+          int ring_fd = g_unix_connection_receive_fd (conn, NULL, NULL);
 
           if (ring_fd > -1)
             {
@@ -198,7 +198,7 @@ write_final_frame (MappedRingBuffer *ring)
 }
 
 static void
-sysprof_collector_free (gpointer data)
+sysprof_collector_free (void *data)
 {
   SysprofCollector *collector = data;
 
@@ -263,7 +263,7 @@ sysprof_collector_get (void)
 void
 sysprof_collector_init (void)
 {
-  static gsize once_init;
+  static size_t once_init;
 
   if (g_once_init_enter (&once_init))
     {
@@ -293,19 +293,19 @@ sysprof_collector_init (void)
 
 void
 sysprof_collector_allocate (SysprofCaptureAddress   alloc_addr,
-                            gint64                  alloc_size,
+                            int64_t                 alloc_size,
                             SysprofBacktraceFunc    backtrace_func,
-                            gpointer                backtrace_data)
+                            void                   *backtrace_data)
 {
   COLLECTOR_BEGIN {
     SysprofCaptureAllocation *ev;
-    gsize len;
+    size_t len;
 
     len = sizeof *ev + (sizeof (SysprofCaptureAllocation) * MAX_UNWIND_DEPTH);
 
     if ((ev = mapped_ring_buffer_allocate (collector->buffer, len)))
       {
-        gint n_addrs;
+        int n_addrs;
 
         /* First take a backtrace, so that backtrace_func() can overwrite
          * a little bit of data *BEFORE* ev->addrs as stratch space. This
@@ -338,18 +338,18 @@ sysprof_collector_allocate (SysprofCaptureAddress   alloc_addr,
 }
 
 void
-sysprof_collector_sample (SysprofBacktraceFunc backtrace_func,
-                          gpointer             backtrace_data)
+sysprof_collector_sample (SysprofBacktraceFunc  backtrace_func,
+                          void                 *backtrace_data)
 {
   COLLECTOR_BEGIN {
     SysprofCaptureSample *ev;
-    gsize len;
+    size_t len;
 
     len = sizeof *ev + (sizeof (SysprofCaptureSample) * MAX_UNWIND_DEPTH);
 
     if ((ev = mapped_ring_buffer_allocate (collector->buffer, len)))
       {
-        gint n_addrs;
+        int n_addrs;
 
         /* See comment from sysprof_collector_allocate(). */
         if (backtrace_func)
@@ -373,16 +373,16 @@ sysprof_collector_sample (SysprofBacktraceFunc backtrace_func,
 }
 
 void
-sysprof_collector_mark (gint64       time,
-                        gint64       duration,
-                        const gchar *group,
-                        const gchar *mark,
-                        const gchar *message)
+sysprof_collector_mark (int64_t     time,
+                        int64_t     duration,
+                        const char *group,
+                        const char *mark,
+                        const char *message)
 {
   COLLECTOR_BEGIN {
     SysprofCaptureMark *ev;
-    gsize len;
-    gsize sl;
+    size_t len;
+    size_t sl;
 
     if (group == NULL)
       group = "";
@@ -416,14 +416,14 @@ sysprof_collector_mark (gint64       time,
 }
 
 void
-sysprof_collector_log (GLogLevelFlags  severity,
-                       const gchar    *domain,
-                       const gchar    *message)
+sysprof_collector_log (int             severity,
+                       const char     *domain,
+                       const char     *message)
 {
   COLLECTOR_BEGIN {
     SysprofCaptureLog *ev;
-    gsize len;
-    gsize sl;
+    size_t len;
+    size_t sl;
 
     if (domain == NULL)
       domain = "";
@@ -455,17 +455,17 @@ sysprof_collector_log (GLogLevelFlags  severity,
 }
 
 void
-sysprof_collector_log_printf (GLogLevelFlags  severity,
-                              const gchar    *domain,
-                              const gchar    *format,
+sysprof_collector_log_printf (int             severity,
+                              const char     *domain,
+                              const char     *format,
                               ...)
 {
   COLLECTOR_BEGIN {
-    g_autofree gchar *formatted = NULL;
+    g_autofree char *formatted = NULL;
     SysprofCaptureLog *ev;
     va_list args;
-    gsize len;
-    gsize sl;
+    size_t len;
+    size_t sl;
 
     va_start (args, format);
     formatted = g_strdup_vprintf (format, args);
diff --git a/src/libsysprof-capture/sysprof-collector.h b/src/libsysprof-capture/sysprof-collector.h
index f234bc2..c7ff9a6 100644
--- a/src/libsysprof-capture/sysprof-collector.h
+++ b/src/libsysprof-capture/sysprof-collector.h
@@ -64,26 +64,26 @@ SYSPROF_AVAILABLE_IN_3_36
 void sysprof_collector_init     (void);
 SYSPROF_AVAILABLE_IN_3_36
 void sysprof_collector_allocate (SysprofCaptureAddress  alloc_addr,
-                                 gint64                 alloc_size,
+                                 int64_t                alloc_size,
                                  SysprofBacktraceFunc   backtrace_func,
-                                 gpointer               backtrace_data);
+                                 void                  *backtrace_data);
 SYSPROF_AVAILABLE_IN_3_36
 void sysprof_collector_sample   (SysprofBacktraceFunc   backtrace_func,
-                                 gpointer               backtrace_data);
+                                 void                  *backtrace_data);
 SYSPROF_AVAILABLE_IN_3_36
-void sysprof_collector_mark     (gint64                 time,
-                                 gint64                 duration,
-                                 const gchar           *group,
-                                 const gchar           *mark,
-                                 const gchar           *message);
+void sysprof_collector_mark     (int64_t                time,
+                                 int64_t                duration,
+                                 const char            *group,
+                                 const char            *mark,
+                                 const char            *message);
 SYSPROF_AVAILABLE_IN_3_36
-void sysprof_collector_log      (GLogLevelFlags         severity,
-                                 const gchar           *domain,
-                                 const gchar           *message);
+void sysprof_collector_log      (int                    severity,
+                                 const char            *domain,
+                                 const char            *message);
 SYSPROF_AVAILABLE_IN_3_38
-void sysprof_collector_log_printf (GLogLevelFlags         severity,
-                                   const gchar           *domain,
-                                   const gchar           *format,
+void sysprof_collector_log_printf (int                  severity,
+                                   const char          *domain,
+                                   const char          *format,
                                    ...) G_GNUC_PRINTF (3, 4);
 
 G_END_DECLS
diff --git a/src/libsysprof-capture/sysprof-platform.c b/src/libsysprof-capture/sysprof-platform.c
index 99c9a55..51464d1 100644
--- a/src/libsysprof-capture/sysprof-platform.c
+++ b/src/libsysprof-capture/sysprof-platform.c
@@ -77,7 +77,7 @@
  * Returns: An fd if successful; otherwise -1 and errno is set.
  */
 int
-sysprof_memfd_create (const gchar *name)
+sysprof_memfd_create (const char *name)
 {
 #ifdef __NR_memfd_create
   if (name == NULL)
@@ -116,7 +116,7 @@ sysprof_memfd_create (const gchar *name)
  *
  * Since: 3.36
  */
-gsize
+size_t
 sysprof_getpagesize (void)
 {
   return _sysprof_getpagesize ();
diff --git a/src/libsysprof-capture/sysprof-platform.h b/src/libsysprof-capture/sysprof-platform.h
index 6dbe4ff..3f0b376 100644
--- a/src/libsysprof-capture/sysprof-platform.h
+++ b/src/libsysprof-capture/sysprof-platform.h
@@ -56,13 +56,16 @@
 
 #pragma once
 
+#include <stdint.h>
+#include <string.h>
+
 #include "sysprof-version-macros.h"
 
 G_BEGIN_DECLS
 
 SYSPROF_AVAILABLE_IN_ALL
-int   sysprof_memfd_create (const gchar *desc);
+int   sysprof_memfd_create (const char *desc);
 SYSPROF_AVAILABLE_IN_3_36
-gsize sysprof_getpagesize   (void);
+size_t sysprof_getpagesize (void);
 
 G_END_DECLS


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