110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _ATOMIC_H
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#define _ATOMIC_H 1
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#include <stdlib.h>
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#include <bits/atomic.h>
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#ifndef atomic_compare_and_exchange_acq
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# define atomic_compare_and_exchange_acq(mem, newval, oldval) \
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({ __typeof (__arch_compare_and_exchange_8_acq (mem, newval, oldval)) \
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__result; \
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if (sizeof (*mem) == 1) \
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__result = __arch_compare_and_exchange_8_acq (mem, newval, oldval); \
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else if (sizeof (*mem) == 2) \
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__result = __arch_compare_and_exchange_16_acq (mem, newval, oldval); \
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else if (sizeof (*mem) == 4) \
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__result = __arch_compare_and_exchange_32_acq (mem, newval, oldval); \
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else if (sizeof (*mem) == 8) \
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__result = __arch_compare_and_exchange_64_acq (mem, newval, oldval); \
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else \
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abort (); \
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__result; })
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#endif
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#ifndef atomic_compare_and_exchange_rel
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# define atomic_compare_and_exchange_rel(mem, oldval, newval) \
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compare_and_exchange_acq (mem, oldval, newval)
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#endif
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#ifndef atomic_exchange_and_add
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# define atomic_exchange_and_add(mem, value) \
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({ __typeof (*mem) __oldval; \
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__typeof (mem) __memp = (mem); \
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__typeof (*mem) __value = (value); \
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\
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do \
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__oldval = (*__memp); \
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while (compare_and_exchange_acq (__memp, __oldval + __value, __oldval)); \
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\
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__value; })
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#endif
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#ifndef atomic_add
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# define atomic_add(mem, value) (void) exchange_and_add (mem, value)
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#endif
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#ifndef atomic_increment
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# define atomic_increment(mem) atomic_add (mem, 1)
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#endif
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#ifndef atomic_decrement
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# define atomic_decrement(mem) atomic_add (mem, -1)
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#endif
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#ifndef atomic_set_bit
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# define atomic_set_bit(mem, bit) \
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(void) ({ __typeof (mem) __memp = (mem); \
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while (1) \
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{ \
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__typeof (*mem) __oldval = *__memp; \
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\
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if (compare_and_exchange_acq (__memp, __oldval | 1 << bit, \
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__oldval) == 0) \
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break; \
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}})
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#endif
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#ifndef atomic_full_barrier
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# define full_barrier() __asm ("" ::: "memory")
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#endif
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#ifndef atomic_read_barrier
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# define read_barrier() full_barrier()
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#endif
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#ifndef atomic_write_barrier
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# define write_barrier() full_barrier()
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#endif
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#endif /* atomic.h */
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