Don't use the thread vtable for g_thread_yield()

glib/gthread-posix.c

@@ -629,8 +629,8 @@ g_thread_create_posix_impl (GThreadFunc thread_func,
   posix_check_err (ret, "pthread_create");
 }
 
-static void
-g_thread_yield_posix_impl (void)
+void
+g_thread_yield (void)
 {
   sched_yield ();
 }
@@ -696,7 +696,7 @@ GThreadFunctions g_thread_functions_for_glib_use =
   g_private_get,
   g_private_set,
   g_thread_create_posix_impl,
-  g_thread_yield_posix_impl,
+  g_thread_yield,
   g_thread_join_posix_impl,
   g_thread_exit_posix_impl,
   g_thread_set_priority_posix_impl,

glib/gthread-win32.c

@@ -479,8 +479,8 @@ g_thread_create_win32_impl (GThreadFunc func,
   g_thread_set_priority_win32_impl (thread, priority);
 }
 
-static void
-g_thread_yield_win32_impl (void)
+void
+g_thread_yield (void)
 {
   Sleep(0);
 }
@@ -798,7 +798,7 @@ GThreadFunctions g_thread_functions_for_glib_use =
   g_private_get,
   g_private_set,
   g_thread_create_win32_impl,       /* thread */
-  g_thread_yield_win32_impl,
+  g_thread_yield,
   g_thread_join_win32_impl,
   g_thread_exit_win32_impl,
   g_thread_set_priority_win32_impl,

glib/gthread.c

@@ -1961,21 +1961,6 @@ g_thread_self (void)
   return (GThread*)thread;
 }
 
-/**
- * g_thread_yield:
- *
- * Gives way to other threads waiting to be scheduled.
- *
- * This function is often used as a method to make busy wait less evil.
- * But in most cases you will encounter, there are better methods to do
- * that. So in general you shouldn't use this function.
- */
-void
-g_thread_yield (void)
-{
-  G_THREAD_UF (thread_yield, ());
-}
-
 /* GStaticRWLock {{{1 ----------------------------------------------------- */
 
 /**