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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc1/] [libgomp/] [config/] [linux/] [ia64/] [futex.h] - Rev 273
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/* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc. Contributed by Richard Henderson <rth@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, long op, int val) { register long out0 asm ("out0") = (long) addr; register long out1 asm ("out1") = op; register long out2 asm ("out2") = val; register long out3 asm ("out3") = 0; register long r8 asm ("r8"); register long r10 asm ("r10"); register long r15 asm ("r15") = SYS_futex; __asm __volatile ("break 0x100000" : "=r"(r15), "=r"(out0), "=r"(out1), "=r"(out2), "=r"(out3), "=r"(r8), "=r"(r10) : "r"(r15), "r"(out0), "r"(out1), "r"(out2), "r"(out3) : "memory", "out4", "out5", "out6", "out7", /* Non-stacked integer registers, minus r8, r10, r15. */ "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", /* Predicate registers. */ "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", /* Non-rotating fp registers. */ "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", /* Branch registers. */ "b6"); return r8 & r10; } 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) { __asm volatile ("hint @pause" : : : "memory"); } static inline void atomic_write_barrier (void) { __sync_synchronize (); }
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