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62 lines
2.0 KiB
62 lines
2.0 KiB
9 years ago
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/*
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Copyright (c) 2013 Martin Sustrik All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom
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the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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#ifndef NN_ATOMIC_INCLUDED
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#define NN_ATOMIC_INCLUDED
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#if defined NN_HAVE_WINDOWS
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#include "win.h"
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#define NN_ATOMIC_WINAPI
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#elif NN_HAVE_ATOMIC_SOLARIS
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#include <atomic.h>
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#define NN_ATOMIC_SOLARIS
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#elif defined NN_HAVE_GCC_ATOMIC_BUILTINS
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#define NN_ATOMIC_GCC_BUILTINS
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#else
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#include "mutex.h"
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#define NN_ATOMIC_MUTEX
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#endif
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#include "int.h"
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struct nn_atomic {
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#if defined NN_ATOMIC_MUTEX
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struct nn_mutex sync;
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#endif
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volatile uint32_t n;
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};
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/* Initialise the object. Set it to value 'n'. */
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void nn_atomic_init (struct nn_atomic *self, uint32_t n);
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/* Destroy the object. */
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void nn_atomic_term (struct nn_atomic *self);
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/* Atomically add n to the object, return old value of the object. */
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uint32_t nn_atomic_inc (struct nn_atomic *self, uint32_t n);
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/* Atomically subtract n from the object, return old value of the object. */
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uint32_t nn_atomic_dec (struct nn_atomic *self, uint32_t n);
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#endif
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