Atomicity.h

/*
 * Copyright (C) 2006-2007 by Marc Boris Duerner
 * Copyright (C) 2010-2010 by Aloysius Indrayanto
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * As a special exception, you may use this file as part of a free
 * software library without restriction. Specifically, if other files
 * instantiate templates or use macros or inline functions from this
 * file, or you compile this file and link it with other files to
 * produce an executable, this file does not by itself cause the
 * resulting executable to be covered by the GNU General Public
 * License. This exception does not however invalidate any other
 * reasons why the executable file might be covered by the GNU Library
 * General Public License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef PT_ATOMICITY_H
#define PT_ATOMICITY_H

#include <Pt/Api.h>
#include <Pt/Types.h>

namespace Pt {

union PT_API atomic_t
{
    int     i;
    long    l;
    int32_t i32;
    int64_t i64;
    void*   p;
#ifdef __cplusplus
    explicit atomic_t(int v = 0);
#endif
};

PT_API int atomicGet(volatile atomic_t& val);

PT_API void atomicSet(volatile atomic_t& val, int n);

PT_API int atomicIncrement(volatile atomic_t& val);

PT_API int atomicDecrement(volatile atomic_t& val);

PT_API int atomicExchange(volatile atomic_t& val, int exch);

PT_API int atomicCompareExchange(volatile atomic_t& val, int exch, int comp);

PT_API int atomicExchangeAdd(volatile atomic_t& val, int add);

PT_API void* atomicExchange(void* volatile& val, void* exch);

PT_API void* atomicCompareExchange(void* volatile& val, void* exch, void* comp);

} // namespace Pt

#endif