[wing/wip/monotonic: 2/2] Add wing_get_process_times

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 3a8dc38c99d40dbdc87e3df7f5c7e3eabe5662e5
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Wed Mar 29 11:11:25 2017 +0200

    Add wing_get_process_times

 wing/wingutils.c |   22 ++++++++++++++++++++++
 wing/wingutils.h |    4 ++++
 2 files changed, 26 insertions(+), 0 deletions(-)
---
diff --git a/wing/wingutils.c b/wing/wingutils.c
index 6b84933..17d8155 100644
--- a/wing/wingutils.c
+++ b/wing/wingutils.c
@@ -133,3 +133,25 @@ wing_get_process_memory (gsize *total_virtual_memory,
 
   return res;
 }
+
+static gint64
+get_time_from_filetime (const FILETIME *ft)
+{
+  gint64 t1 = (gint64)ft->dwHighDateTime << 32 | ft->dwLowDateTime;
+
+  return t1 / 10 - 11644473600000000; /* Jan 1, 1601 */
+}
+
+gboolean
+wing_get_process_times (gint64 *current_user_time,
+                        gint64 *current_system_time)
+{
+  FILETIME creation_time, exit_time, kernel_time, user_time;
+
+  GetProcessTimes (GetCurrentProcess (), &creation_time, &exit_time, &kernel_time, &user_time);
+
+  *current_user_time = get_time_from_filetime (&user_time);
+  *current_system_time = get_time_from_filetime (&kernel_time);
+
+  return TRUE;
+}
diff --git a/wing/wingutils.h b/wing/wingutils.h
index 42d54b0..4f27050 100644
--- a/wing/wingutils.h
+++ b/wing/wingutils.h
@@ -40,6 +40,10 @@ WING_AVAILABLE_IN_ALL
 gboolean     wing_get_process_memory   (gsize *total_virtual_memory,
                                         gsize *total_physical_memory);
 
+WING_AVAILABLE_IN_ALL
+gboolean     wing_get_process_times    (gint64 *current_user_time,
+                                        gint64 *current_system_time);
+
 G_END_DECLS
 
 #endif /* WING_UTILS_H */