diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sem_post.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sem_post.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sem_post.c index 671b43f7f7..641ce661a1 100644 --- a/nptl/sysdeps/unix/sysv/linux/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/sem_post.c @@ -1,5 +1,5 @@ /* sem_post -- post to a POSIX semaphore. Generic futex-using version. - Copyright (C) 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. @@ -31,12 +31,14 @@ __new_sem_post (sem_t *sem) { int *futex = (int *) sem; - int nr = atomic_increment_val (futex); - int err = lll_futex_wake (futex, nr); - if (__builtin_expect (err, 0) < 0) + if (atomic_increment_val (futex) == 1) { - __set_errno (-err); - return -1; + int err = lll_futex_wake (futex, 1); + if (__builtin_expect (err, 0) < 0) + { + __set_errno (-err); + return -1; + } } return 0; } |