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handle null arguments to legacy bsd err.h functions
[musl]
/
src
/
thread
/
sem_post.c
diff --git
a/src/thread/sem_post.c
b/src/thread/sem_post.c
index
148ab78
..
14a2dfe
100644
(file)
--- a/
src/thread/sem_post.c
+++ b/
src/thread/sem_post.c
@@
-7,6
+7,10
@@
int sem_post(sem_t *sem)
do {
val = sem->__val[0];
waiters = sem->__val[1];
+ if (val == SEM_VALUE_MAX) {
+ errno = EOVERFLOW;
+ return -1;
+ }
} while (a_cas(sem->__val, val, val+1+(val<0)) != val);
if (val<0 || waiters) __wake(sem->__val, 1, 0);
return 0;