mirror of
https://github.com/zephyrproject-rtos/zephyr
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a5e40e7247
The atomic APIs are not really tied to nanokernel-specific capabilities, and can be used by anyone at anytime -- even during system initialization! Change-Id: I427954029b4b465127cb5b4b642c2f9968c17d5a Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
/* atomic operations */
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/*
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* Copyright (c) 1997-2015, Wind River Systems, Inc.
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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 are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ATOMIC_H__
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#define __ATOMIC_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef int atomic_t;
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typedef atomic_t atomic_val_t;
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extern atomic_val_t atomic_add(atomic_t *target, atomic_val_t value);
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extern atomic_val_t atomic_and(atomic_t *target, atomic_val_t value);
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extern atomic_val_t atomic_dec(atomic_t *target);
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extern atomic_val_t atomic_inc(atomic_t *target);
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extern atomic_val_t atomic_nand(atomic_t *target, atomic_val_t value);
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extern atomic_val_t atomic_or(atomic_t *target, atomic_val_t value);
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extern atomic_val_t atomic_sub(atomic_t *target, atomic_val_t value);
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extern atomic_val_t atomic_xor(atomic_t *target, atomic_val_t value);
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extern atomic_val_t atomic_clear(atomic_t *target);
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extern atomic_val_t atomic_get(atomic_t *target);
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extern atomic_val_t atomic_set(atomic_t *target, atomic_val_t value);
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extern int atomic_cas(atomic_t *target,
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atomic_val_t oldValue, atomic_val_t newValue);
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#define ATOMIC_INIT(i) {(i)}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ATOMIC_H__ */
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