Eina: Micro-optimize eina_main_loop_isdevs/jpeg/evasgl

Since this is called a crazy number of times with Eo, it would
be good to have the fastest solution possible. pthread_equal
costs about twice as much as pthread_self() even though it
can safely be emulated with ==

Valgrind reports a drop from ~3.2% to ~1.5% of all instructions.

1 files changed, 7 insertions, 1 deletions

diff --git a/src/lib/eina/eina_main.c b/src/lib/eina/eina_main.c
index 1daa795e87..ffb017767e 100644
--- a/src/lib/eina/eina_main.c
+++ b/src/lib/eina/eina_main.c
@@ -416,7 +416,13 @@ EAPI Eina_Bool
 eina_main_loop_is(void)
 {
 #ifdef EFL_HAVE_THREADS
-  if (pthread_equal(_eina_main_loop, pthread_self()))
+# ifdef __GNUC__
+   /* pthread_self() can't be optimized, it's a single asm "movl" */
+   if (__builtin_types_compatible_p(pthread_t, unsigned long int))
+     return (pthread_self() == _eina_main_loop);
+   else
+# endif
+   if (pthread_equal(_eina_main_loop, pthread_self()))
      return EINA_TRUE;
 #endif
    return EINA_FALSE;