c11/threads: create mutexattrs only when needed
If the mutexattrs are the default one can just pass NULL to
pthread_mutex_init. As the compiler does not know this detail it
unnecessarily creates/destroys the attrs.
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
diff --git a/include/c11/threads_posix.h b/include/c11/threads_posix.h
index ce9853b..11d36e4 100644
--- a/include/c11/threads_posix.h
+++ b/include/c11/threads_posix.h
@@ -180,9 +180,14 @@
&& type != (mtx_timed|mtx_recursive)
&& type != (mtx_try|mtx_recursive))
return thrd_error;
+
+ if ((type & mtx_recursive) == 0) {
+ pthread_mutex_init(mtx, NULL);
+ return thrd_success;
+ }
+
pthread_mutexattr_init(&attr);
- if ((type & mtx_recursive) != 0)
- pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+ pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(mtx, &attr);
pthread_mutexattr_destroy(&attr);
return thrd_success;