From 83d87915da34fc02d170ff8c356406040da2823f Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 15 May 2007 06:24:31 +0000 Subject: * 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. --- nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'nptl/sysdeps/unix/sysv/linux/sparc') diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c index be1cc60b11..ba77aa90bd 100644 --- a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_post.c @@ -1,5 +1,5 @@ /* sem_post -- post to a POSIX semaphore. SPARC version. - Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek , 2003. @@ -39,11 +39,14 @@ __new_sem_post (sem_t *sem) nr = ++*futex; __sparc32_atomic_do_unlock24 (futex + 1); } - int err = lll_futex_wake (futex, nr); - if (__builtin_expect (err, 0) < 0) + if (nr == 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; } -- cgit v1.2.3-70-g09d2