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| author | Joseph Myers <joseph@codesourcery.com> | 2012-08-31 19:49:31 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-08-31 19:49:31 +0000 |
| commit | 033d54a2d43a92cdb1794a4dfece4d465cf36f6b (patch) | |
| tree | 398c6f127057702fb0f9254ee1c76e2cb224fdcf /nptl/sysdeps | |
| parent | d22e28b070d3d1572d39a463d711c6f223078552 (diff) | |
| download | glibc-033d54a2d43a92cdb1794a4dfece4d465cf36f6b.tar.gz glibc-033d54a2d43a92cdb1794a4dfece4d465cf36f6b.tar.xz glibc-033d54a2d43a92cdb1794a4dfece4d465cf36f6b.zip | |
Fix sem_post race (bug 14532).
Diffstat (limited to 'nptl/sysdeps')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sem_post.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sem_post.c index 56f27e977e..67e8cc5429 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, 2007, 2008 Free Software Foundation, Inc. + Copyright (C) 2003-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. @@ -40,7 +40,7 @@ __new_sem_post (sem_t *sem) return -1; } } - while (atomic_compare_and_exchange_bool_acq (&isem->value, cur + 1, cur)); + while (atomic_compare_and_exchange_bool_rel (&isem->value, cur + 1, cur)); atomic_full_barrier (); if (isem->nwaiters > 0) |