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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [libgomp/] [config/] [linux/] [alpha/] [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. */ #ifndef SYS_futex #define SYS_futex 394 #endif static inline void futex_wait (int *addr, int val) { register long sc_0 __asm__("$0"); register long sc_16 __asm__("$16"); register long sc_17 __asm__("$17"); register long sc_18 __asm__("$18"); register long sc_19 __asm__("$19"); sc_0 = SYS_futex; sc_16 = (long) addr; sc_17 = gomp_futex_wait; sc_18 = val; sc_19 = 0; __asm volatile ("callsys" : "=r" (sc_0), "=r"(sc_19) : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18), "1"(sc_19) : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$22", "$23", "$24", "$25", "$27", "$28", "memory"); if (__builtin_expect (sc_19, 0) && sc_0 == ENOSYS) { gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; sc_0 = SYS_futex; sc_17 &= ~FUTEX_PRIVATE_FLAG; sc_19 = 0; __asm volatile ("callsys" : "=r" (sc_0), "=r"(sc_19) : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18), "1"(sc_19) : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$22", "$23", "$24", "$25", "$27", "$28", "memory"); } } static inline void futex_wake (int *addr, int count) { register long sc_0 __asm__("$0"); register long sc_16 __asm__("$16"); register long sc_17 __asm__("$17"); register long sc_18 __asm__("$18"); register long sc_19 __asm__("$19"); sc_0 = SYS_futex; sc_16 = (long) addr; sc_17 = gomp_futex_wake; sc_18 = count; __asm volatile ("callsys" : "=r" (sc_0), "=r"(sc_19) : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18) : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$22", "$23", "$24", "$25", "$27", "$28", "memory"); if (__builtin_expect (sc_19, 0) && sc_0 == ENOSYS) { gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; sc_0 = SYS_futex; sc_17 &= ~FUTEX_PRIVATE_FLAG; __asm volatile ("callsys" : "=r" (sc_0), "=r"(sc_19) : "0"(sc_0), "r" (sc_16), "r"(sc_17), "r"(sc_18) : "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$22", "$23", "$24", "$25", "$27", "$28", "memory"); } } static inline void cpu_relax (void) { __asm volatile ("" : : : "memory"); } static inline void atomic_write_barrier (void) { __asm volatile ("wmb" : : : "memory"); }
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