From 9bdabb94dac4be59ab69b3330457861ae997c940 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 19 Jun 2003 19:53:12 +0000 Subject: Update. 2003-06-19 Jakub Jelinek * sysdeps/unix/sysv/linux/ia64/sem_post.c: Move to... * sysdeps/unix/sysv/linux/sem_post.c: ...here. * sysdeps/unix/sysv/linux/sem_post.c: Move to... * sysdeps/unix/sysv/linux/powerpc/sem_post.c: ... here. Pass nr + 1 instead of nr to lll_futex_wake. Only set errno and return -1 if err < 0. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h (lll_futex_wait, lll_futex_timed_wait, lll_futex_wake, lll_futex_requeue): On success return actual return value from the syscall, not 0. compat_timer_getoverrun. --- nptl/sysdeps/unix/sysv/linux/sem_post.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'nptl/sysdeps/unix/sysv/linux/sem_post.c') diff --git a/nptl/sysdeps/unix/sysv/linux/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sem_post.c index 2da6ecd696..b4ee4cfc8a 100644 --- a/nptl/sysdeps/unix/sysv/linux/sem_post.c +++ b/nptl/sysdeps/unix/sysv/linux/sem_post.c @@ -1,7 +1,7 @@ /* sem_post -- post to a POSIX semaphore. Generic futex-using version. Copyright (C) 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. - Contributed by Paul Mackerras , 2003. + Contributed by Jakub Jelinek , 2003. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -32,13 +32,14 @@ __new_sem_post (sem_t *sem) int *futex = (int *) sem; int err, nr; - __asm __volatile (__lll_rel_instr ::: "memory"); nr = atomic_exchange_and_add (futex, 1); - err = lll_futex_wake (futex, nr); - if (err == 0) - return 0; - __set_errno (-err); - return -1; + err = lll_futex_wake (futex, nr + 1); + if (__builtin_expect (err, 0) < 0) + { + __set_errno (-err); + return -1; + } + return 0; } versioned_symbol (libpthread, __new_sem_post, sem_post, GLIBC_2_1); #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) -- cgit v1.2.3