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60 lines
1.9 KiB
60 lines
1.9 KiB
/*
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* $Id$
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*
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* Copyright (C) 2006 iptelorg GmbH
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/** @file @brief
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* common part for all the atomic operations (atomic_t and common operations)
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* See @ref atomic_ops.h for more info.
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*/
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/*
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* History:
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* --------
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* 2006-03-08 created by andrei
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* 2007-05-13 split from atomic_ops.h (andrei)
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*/
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#ifndef __atomic_common
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#define __atomic_common
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/** @brief atomic_t defined as a struct to easily catch non atomic ops. on it,
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* e.g. atomic_t foo; foo++ will generate a compile error */
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typedef struct{ volatile int val; } atomic_t;
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/** @name AtomicOps store and load operations are atomic on all cpus, note however that they
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* don't include memory barriers so if you want to use atomic_{get,set}
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* to implement mutexes you must use the mb_* versions or explicitely use
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* the barriers */
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/*@{ */
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#define atomic_set_int(pvar, i) (*(int*)(pvar)=i)
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#define atomic_set_long(pvar, i) (*(long*)(pvar)=i)
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#define atomic_get_int(pvar) (*(int*)(pvar))
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#define atomic_get_long(pvar) (*(long*)(pvar))
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#define atomic_set(at_var, value) (atomic_set_int(&((at_var)->val), (value)))
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inline static int atomic_get(atomic_t *v)
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{
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return atomic_get_int(&(v->val));
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}
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/*@} */
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#endif
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