[glib: 15/30] glib: Drop unnecessary volatile qualifiers from internal variables

[Philip Withnall <pwithnall src gnome org>]

commit 1314ff93fc4d3379483c33da6a7deff27f71ed95
Author: Philip Withnall <pwithnall endlessos org>
Date:   Wed Nov 11 18:40:56 2020 +0000

    glib: Drop unnecessary volatile qualifiers from internal variables
    
    These variables were already (correctly) accessed atomically. The
    `volatile` qualifier doesn’t help with that.
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>
    
    Helps: #600

 glib/gdatetime.c | 2 +-
 glib/gkeyfile.c  | 2 +-
 glib/gmain.c     | 8 ++++----
 glib/gmarkup.c   | 2 +-
 glib/gregex.c    | 6 +++---
 glib/gthread.c   | 6 +++---
 6 files changed, 13 insertions(+), 13 deletions(-)
---
diff --git a/glib/gdatetime.c b/glib/gdatetime.c
index 1755257be..453077f6d 100644
--- a/glib/gdatetime.c
+++ b/glib/gdatetime.c
@@ -126,7 +126,7 @@ struct _GDateTime
   /* 1 is 0001-01-01 in Proleptic Gregorian */
   gint32 days;
 
-  volatile gint ref_count;
+  gint ref_count;  /* (atomic) */
 };
 
 /* Time conversion {{{1 */
diff --git a/glib/gkeyfile.c b/glib/gkeyfile.c
index 9d0215331..bbe638b74 100644
--- a/glib/gkeyfile.c
+++ b/glib/gkeyfile.c
@@ -512,7 +512,7 @@ struct _GKeyFile
 
   gchar **locales;
 
-  volatile gint ref_count;
+  gint ref_count;  /* (atomic) */
 };
 
 typedef struct _GKeyFileKeyValuePair GKeyFileKeyValuePair;
diff --git a/glib/gmain.c b/glib/gmain.c
index 772b8ecfc..9c5f0ef1e 100644
--- a/glib/gmain.c
+++ b/glib/gmain.c
@@ -272,7 +272,7 @@ struct _GMainContext
   guint owner_count;
   GSList *waiters;
 
-  volatile gint ref_count;
+  gint ref_count;  /* (atomic) */
 
   GHashTable *sources;              /* guint -> GSource */
 
@@ -303,7 +303,7 @@ struct _GMainContext
 
 struct _GSourceCallback
 {
-  volatile gint ref_count;
+  gint ref_count;  /* (atomic) */
   GSourceFunc func;
   gpointer    data;
   GDestroyNotify notify;
@@ -313,7 +313,7 @@ struct _GMainLoop
 {
   GMainContext *context;
   gboolean is_running; /* (atomic) */
-  volatile gint ref_count;
+  gint ref_count;  /* (atomic) */
 };
 
 struct _GTimeoutSource
@@ -4749,7 +4749,7 @@ g_main_context_get_poll_func (GMainContext *context)
  *
  * |[<!-- language="C" --> 
  *   #define NUM_TASKS 10
- *   static volatile gint tasks_remaining = NUM_TASKS;
+ *   static gint tasks_remaining = NUM_TASKS;  // (atomic)
  *   ...
  *  
  *   while (g_atomic_int_get (&tasks_remaining) != 0)
diff --git a/glib/gmarkup.c b/glib/gmarkup.c
index ba4dfd2e4..b8327fb6d 100644
--- a/glib/gmarkup.c
+++ b/glib/gmarkup.c
@@ -119,7 +119,7 @@ struct _GMarkupParseContext
 {
   const GMarkupParser *parser;
 
-  volatile gint ref_count;
+  gint ref_count;  /* (atomic) */
 
   GMarkupParseFlags flags;
 
diff --git a/glib/gregex.c b/glib/gregex.c
index 52416bbb9..5e6ddfb46 100644
--- a/glib/gregex.c
+++ b/glib/gregex.c
@@ -203,7 +203,7 @@ G_STATIC_ASSERT (G_REGEX_RAW               == PCRE_UTF8);
 
 struct _GMatchInfo
 {
-  volatile gint ref_count;      /* the ref count */
+  gint ref_count;               /* the ref count (atomic) */
   GRegex *regex;                /* the regex */
   GRegexMatchFlags match_opts;  /* options used at match time on the regex */
   gint matches;                 /* number of matching sub patterns */
@@ -218,7 +218,7 @@ struct _GMatchInfo
 
 struct _GRegex
 {
-  volatile gint ref_count;      /* the ref count for the immutable part */
+  gint ref_count;               /* the ref count for the immutable part (atomic) */
   gchar *pattern;               /* the pattern */
   pcre *pcre_re;                /* compiled form of the pattern */
   GRegexCompileFlags compile_opts;      /* options used at compile time on the pattern */
@@ -1300,7 +1300,7 @@ g_regex_new (const gchar         *pattern,
   pcre *re;
   const gchar *errmsg;
   gboolean optimize = FALSE;
-  static volatile gsize initialised = 0;
+  static gsize initialised = 0;
 
   g_return_val_if_fail (pattern != NULL, NULL);
   g_return_val_if_fail (error == NULL || *error == NULL, NULL);
diff --git a/glib/gthread.c b/glib/gthread.c
index 53f3a0848..612a9739f 100644
--- a/glib/gthread.c
+++ b/glib/gthread.c
@@ -513,7 +513,7 @@ static GMutex    g_once_mutex;
 static GCond     g_once_cond;
 static GSList   *g_once_init_list = NULL;
 
-static volatile guint g_thread_n_created_counter = 0;
+static guint g_thread_n_created_counter = 0;  /* (atomic) */
 
 static void g_thread_cleanup (gpointer data);
 static GPrivate     g_thread_specific_private = G_PRIVATE_INIT (g_thread_cleanup);
@@ -694,7 +694,7 @@ g_once_impl (GOnce       *once,
 gboolean
 (g_once_init_enter) (volatile void *location)
 {
-  volatile gsize *value_location = location;
+  gsize *value_location = (gsize *) location;
   gboolean need_init = FALSE;
   g_mutex_lock (&g_once_mutex);
   if (g_atomic_pointer_get (value_location) == 0)
@@ -731,7 +731,7 @@ void
 (g_once_init_leave) (volatile void *location,
                      gsize          result)
 {
-  volatile gsize *value_location = location;
+  gsize *value_location = (gsize *) location;
 
   g_return_if_fail (g_atomic_pointer_get (value_location) == 0);
   g_return_if_fail (result != 0);