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| author | Ulrich Drepper <drepper@redhat.com> | 2007-05-15 06:24:31 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-05-15 06:24:31 +0000 |
| commit | 83d87915da34fc02d170ff8c356406040da2823f (patch) | |
| tree | 7d76dcc1f12bd5dd7d65b329a3cd37422be12a82 /nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c | |
| parent | 1d47e92f71c36165364c8807e52d0d0dc0f66142 (diff) | |
| download | glibc-83d87915da34fc02d170ff8c356406040da2823f.tar.gz glibc-83d87915da34fc02d170ff8c356406040da2823f.tar.xz glibc-83d87915da34fc02d170ff8c356406040da2823f.zip | |
* sysdeps/unix/sysv/linux/sem_post.c: Only wake threads if old
value of semaphore was zero. * sysdeps/unix/sysv/linux/i386/i486/sem_post.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/sem_post.c: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_post.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Remove unnecessary extra cancellation test. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Likewise.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c b/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c index 91b9955181..86dd0ebb3b 100644 --- a/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c @@ -1,5 +1,5 @@ /* sem_post -- post to a POSIX semaphore. Powerpc 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 Paul Mackerras <paulus@au.ibm.com>, 2003. @@ -32,12 +32,14 @@ __new_sem_post (sem_t *sem) int *futex = (int *) sem; __asm __volatile (__lll_rel_instr ::: "memory"); - 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; } |