65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* Copyright (C) 2005 Free Software Foundation, Inc.
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Contributed by Jakub Jelinek <jakub@redhat.com>.
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This file is part of the GNU OpenMP Library (libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with libgomp; see the file COPYING.LIB. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* As a special exception, if you link this library with other files, some
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of which are compiled with GCC, to produce an executable, this library
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does not by itself cause the resulting executable to be covered by the
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GNU General Public License. This exception does not however invalidate
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any other reasons why the executable file might be covered by the GNU
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General Public License. */
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/* Provide target-specific access to the futex system call. */
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#include <sys/syscall.h>
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#define FUTEX_WAIT 0
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#define FUTEX_WAKE 1
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static inline void
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sys_futex0 (int *addr, int op, int val)
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{
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register long int gpr2 __asm__ ("2");
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register long int gpr3 __asm__ ("3");
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register long int gpr4 __asm__ ("4");
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register long int gpr5 __asm__ ("5");
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gpr2 = (long) addr;
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gpr3 = op;
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gpr4 = val;
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gpr5 = 0;
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__asm volatile ("svc %b1"
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: "=d" (gpr2)
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: "i" (SYS_futex),
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"0" (gpr2), "d" (gpr3), "d" (gpr4), "d" (gpr5)
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: "memory");
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}
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static inline void
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futex_wait (int *addr, int val)
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{
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sys_futex0 (addr, FUTEX_WAIT, val);
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}
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static inline void
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futex_wake (int *addr, int count)
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{
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sys_futex0 (addr, FUTEX_WAKE, count);
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}
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