major semaphore improvements (performance and correctness)

[musl] / src / thread / sem_post.c

diff --git a/src/thread/sem_post.c b/src/thread/sem_post.c
index 0bd8a46..8f4700c 100644 (file)
--- a/src/thread/sem_post.c
+++ b/src/thread/sem_post.c
@@ -3,7 +3,8 @@
 
 int sem_post(sem_t *sem)
 {
-       if (!a_fetch_add(sem->__val, 1))
+       a_inc(sem->__val);
+       if (sem->__val[1])
                __wake(sem->__val, 1, 0);
        return 0;
 }