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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libgomp/] [config/] [linux/] [sparc/] [futex.h] - Rev 303
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/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc. Contributed by Jakub Jelinek <jakub@redhat.com>. 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. */ #include <sys/syscall.h> static inline long sys_futex0 (int *addr, int op, int val) { register long int g1 __asm__ ("g1"); register long int o0 __asm__ ("o0"); register long int o1 __asm__ ("o1"); register long int o2 __asm__ ("o2"); register long int o3 __asm__ ("o3"); g1 = SYS_futex; o0 = (long) addr; o1 = op; o2 = val; o3 = 0; #ifdef __arch64__ # define SYSCALL_STRING "ta\t0x6d; bcs,a,pt %%xcc, 1f; sub %%g0, %%o0, %%o0; 1:" #else # define SYSCALL_STRING "ta\t0x10; bcs,a 1f; sub %%g0, %%o0, %%o0; 1:" #endif __asm volatile (SYSCALL_STRING : "=r" (g1), "=r" (o0) : "0" (g1), "1" (o0), "r" (o1), "r" (o2), "r" (o3) : "g2", "g3", "g4", "g5", "g6", "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", #ifdef __arch64__ "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", #endif "cc", "memory"); return o0; } static inline void futex_wait (int *addr, int val) { long err = sys_futex0 (addr, gomp_futex_wait, val); if (__builtin_expect (err == ENOSYS, 0)) { gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; sys_futex0 (addr, gomp_futex_wait, val); } } static inline void futex_wake (int *addr, int count) { long err = sys_futex0 (addr, gomp_futex_wake, count); if (__builtin_expect (err == ENOSYS, 0)) { gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; sys_futex0 (addr, gomp_futex_wake, count); } } static inline void cpu_relax (void) { #if defined __arch64__ || defined __sparc_v9__ __asm volatile ("membar #LoadLoad" : : : "memory"); #else __asm volatile ("" : : : "memory"); #endif } static inline void atomic_write_barrier (void) { #if defined __arch64__ || defined __sparc_v9__ __asm volatile ("membar #StoreStore" : : : "memory"); #else __sync_synchronize (); #endif }
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