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# cpl_atomic_ops.h

    00001 /**********************************************************************
    00002  * $Id: cpl_atomic_ops.h 19884 2010-06-17 22:01:19Z rouault $
    00003  *
    00004  * Name:     cpl_atomic_ops.h
    00005  * Project:  CPL - Common Portability Library
    00006  * Purpose:  Atomic operation functions.
    00007  * Author:   Even Rouault, <even dot rouault at mines dash paris dot org>
    00008  *
    00009  **********************************************************************
    00010  * Copyright (c) 2009, Even Rouault, <even dot rouault at mines dash paris dot org>
    00011  *
    00012  * Permission is hereby granted, free of charge, to any person obtaining a
    00013  * copy of this software and associated documentation files (the "Software"),
    00014  * to deal in the Software without restriction, including without limitation
    00015  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
    00016  * and/or sell copies of the Software, and to permit persons to whom the
    00017  * Software is furnished to do so, subject to the following conditions:
    00018  *
    00019  * The above copyright notice and this permission notice shall be included
    00020  * in all copies or substantial portions of the Software.
    00021  *
    00022  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    00023  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00024  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
    00025  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00026  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    00027  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    00028  * DEALINGS IN THE SOFTWARE.
    00029  ****************************************************************************/
    00030
    00031 #ifndef _CPL_ATOMIC_OPS_INCLUDED
    00032 #define _CPL_ATOMIC_OPS_INCLUDED
    00033
    00034 #include "cpl_port.h"
    00035
    00036 CPL_C_START
    00037
    00061 int CPL_DLL CPLAtomicAdd(volatile int* ptr, int increment);
    00062
    00072 #ifdef HAS_CPL_INLINE
    00073 CPL_INLINE int CPLAtomicInc(volatile int* ptr)
    00074 {
    00075     return CPLAtomicAdd(ptr, 1);
    00076 }
    00077 #else
    00078 int CPL_DLL CPLAtomicInc(volatile int* ptr);
    00079 #endif
    00080
    00090 #ifdef HAS_CPL_INLINE
    00091 CPL_INLINE int CPLAtomicDec(volatile int* ptr)
    00092 {
    00093     return CPLAtomicAdd(ptr, -1);
    00094 }
    00095 #else
    00096 int CPL_DLL CPLAtomicDec(volatile int* ptr);
    00097 #endif
    00098
    00099 CPL_C_END
    00100
    00101 #endif /* _CPL_ATOMIC_OPS_INCLUDED */

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