[glib/wip/ghandle: 13/16] Add "coarse" monotonic time

[Ryan Lortie <desrt src gnome org>]

commit b9ba498d42b14b381cfb51922218b1b39f6c4a2f
Author: Ryan Lortie <desrt desrt ca>
Date:   Thu Dec 18 22:22:04 2014 -0500

    Add "coarse" monotonic time

 docs/reference/glib/glib-sections.txt |    1 +
 glib/gmain.c                          |   28 ++++++++++++++++++++++++++++
 glib/gmain.h                          |    2 ++
 3 files changed, 31 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/glib/glib-sections.txt b/docs/reference/glib/glib-sections.txt
index aaac897..02809af 100644
--- a/docs/reference/glib/glib-sections.txt
+++ b/docs/reference/glib/glib-sections.txt
@@ -1455,6 +1455,7 @@ g_time_val_to_iso8601
 
 <SUBSECTION>
 g_get_monotonic_time
+g_get_coarse_monotonic_time
 g_get_real_time
 
 <SUBSECTION>
diff --git a/glib/gmain.c b/glib/gmain.c
index 8b369c3..ad505cf 100644
--- a/glib/gmain.c
+++ b/glib/gmain.c
@@ -2850,6 +2850,34 @@ g_get_monotonic_time (void)
 }
 #endif
 
+/**
+ * g_get_coarse_monotonic_time:
+ *
+ * Gets the "coarse" monotonic time.
+ *
+ * This is the same thing as fetching the monotonic time except that it
+ * may be implemented in a way that is faster and less accurate.  On
+ * Linux this corresponds to CLOCK_MONOTONIC_COARSE.
+ *
+ * Since: 2.44
+ */
+gint64
+g_get_coarse_monotonic_time (void)
+{
+#ifdef __linux__
+  struct timespec ts;
+
+  result = clock_gettime (CLOCK_MONOTONIC_COARSE, &ts);
+
+  if G_UNLIKELY (result != 0)
+    g_error ("GLib requires CLOCK_MONOTONIC_COARSE on Linux");
+
+  return (((gint64) ts.tv_sec) * 1000000) + (ts.tv_nsec / 1000);
+#else
+  return g_get_monotonic_time ();
+#endif
+}
+
 static void
 g_main_dispatch_free (gpointer dispatch)
 {
diff --git a/glib/gmain.h b/glib/gmain.h
index 55ae364..4d1c320 100644
--- a/glib/gmain.h
+++ b/glib/gmain.h
@@ -543,6 +543,8 @@ GLIB_AVAILABLE_IN_ALL
 void   g_get_current_time                 (GTimeVal       *result);
 GLIB_AVAILABLE_IN_ALL
 gint64 g_get_monotonic_time               (void);
+GLIB_AVAILABLE_IN_2_44
+gint64 g_get_coarse_monotonic_time        (void);
 GLIB_AVAILABLE_IN_ALL
 gint64 g_get_real_time                    (void);