From 26120950e26478740a29fd0b1fd78a0bd6b880c8 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Wed, 26 Oct 2011 00:28:47 -0400 Subject: report sem value overflows in sem_post this is not required by the standard, but it's nicer than corrupting the state and rather inexpensive. --- src/thread/sem_post.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/thread/sem_post.c b/src/thread/sem_post.c index 148ab780..14a2dfe2 100644 --- 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; -- cgit v1.2.1