diff options
Diffstat (limited to 'gcc-4.4.3/libgomp/config/linux/futex.h')
-rw-r--r-- | gcc-4.4.3/libgomp/config/linux/futex.h | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/gcc-4.4.3/libgomp/config/linux/futex.h b/gcc-4.4.3/libgomp/config/linux/futex.h deleted file mode 100644 index 3c8345086..000000000 --- a/gcc-4.4.3/libgomp/config/linux/futex.h +++ /dev/null @@ -1,80 +0,0 @@ -/* Copyright (C) 2010, 2011 Free Software Foundation, Inc. - Contributed by ARM Ltd. - - This file is part of the GNU OpenMP Library (libgomp). - - Libgomp is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3, or (at your option) - any later version. - - Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS - FOR A PARTICULAR PURPOSE. See the GNU General Public License for - more details. - - Under Section 7 of GPL version 3, you are granted additional - permissions described in the GCC Runtime Library Exception, version - 3.1, as published by the Free Software Foundation. - - You should have received a copy of the GNU General Public License and - a copy of the GCC Runtime Library Exception along with this program; - see the files COPYING3 and COPYING.RUNTIME respectively. If not, see - <http://www.gnu.org/licenses/>. */ - -/* Provide target-specific access to the futex system call. */ - -/* The include file hierachy above us (wait.h) has pushed visibility - hidden, this will be applied to prototypes with headers we include - with the effect that we cannot link against an external function - (syscall). The solution here is to push default visibility, include - our required headers then reinstante the original visibility. */ - -#pragma GCC visibility push(default) - -#undef _GNU_SOURCE /* could be previously defined to 1 instead */ -#define _GNU_SOURCE -#include <unistd.h> -#include <sys/syscall.h> - -#pragma GCC visibility pop - -#if !defined(SYS_futex) -#define SYS_futex __NR_futex -#endif - -static inline void -futex_wait (int *addr, int val) -{ - long err = syscall (SYS_futex, addr, gomp_futex_wait, val, NULL); - if (__builtin_expect (err == -ENOSYS, 0)) - { - gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; - gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; - syscall (SYS_futex, addr, gomp_futex_wait, val, NULL); - } -} - -static inline void -futex_wake (int *addr, int count) -{ - long err = syscall (SYS_futex, addr, gomp_futex_wake, count); - if (__builtin_expect (err == -ENOSYS, 0)) - { - gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; - gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; - syscall (SYS_futex, addr, gomp_futex_wake, count); - } -} - -static inline void -cpu_relax (void) -{ - __asm volatile ("" : : : "memory"); -} - -static inline void -atomic_write_barrier (void) -{ - __sync_synchronize (); -} |