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contrib/bind9/lib/isc/arm/include/isc/atomic.h
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contrib/bind9/lib/isc/arm/include/isc/atomic.h
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/*-
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* Copyright (c) 2007 Warner Losh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef ISC_ATOMIC_H
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#define ISC_ATOMIC_H 1
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#include <isc/platform.h>
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#include <isc/types.h>
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#include <machine/atomic.h>
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#ifdef __FreeBSD__
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static inline isc_int32_t
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isc_atomic_xadd(isc_int32_t *p, isc_int32_t val)
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{
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return atomic_fetchadd_int(p, val);
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}
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static inline void
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isc_atomic_store(isc_int32_t *p, isc_int32_t val)
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{
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atomic_store_rel_int(p, val);
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}
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static inline isc_int32_t
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isc_atomic_cmpxchg(isc_int32_t *p, isc_int32_t cmpval, isc_int32_t val)
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{
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return atomic_cmpset_int(p, cmpval, val);
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}
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#else /* !FreeBSD */
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#error "unsupported compiler. disable atomic ops by --disable-atomic"
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#endif
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#endif /* ISC_ATOMIC_H */
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