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| author | Rich Felker <dalias@aerifal.cx> | 2011-10-26 00:28:47 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-10-26 00:28:47 -0400 |
| commit | 26120950e26478740a29fd0b1fd78a0bd6b880c8 (patch) | |
| tree | 0dde8c4e2b3fdd7d7b48718deca7d27e7cd6a1ba /src/thread | |
| parent | 42976cee2d31bbaade6d2169a9f234cd82af0715 (diff) | |
| download | musl-26120950e26478740a29fd0b1fd78a0bd6b880c8.tar.gz musl-26120950e26478740a29fd0b1fd78a0bd6b880c8.tar.bz2 musl-26120950e26478740a29fd0b1fd78a0bd6b880c8.tar.xz musl-26120950e26478740a29fd0b1fd78a0bd6b880c8.zip | |
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.
Diffstat (limited to 'src/thread')
| -rw-r--r-- | src/thread/sem_post.c | 4 |
1 files changed, 4 insertions, 0 deletions
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; |