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cpl_atomic_ops.h
1 /**********************************************************************
2 * $Id$
3 *
4 * Name: cpl_atomic_ops.h
5 * Project: CPL - Common Portability Library
6 * Purpose: Atomic operation functions.
7 * Author: Even Rouault, <even dot rouault at spatialys.com>
8 *
9 **********************************************************************
10 * Copyright (c) 2009-2010, Even Rouault <even dot rouault at spatialys.com>
11 *
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
18 *
19 * The above copyright notice and this permission notice shall be included
20 * in all copies or substantial portions of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
29 ****************************************************************************/
30
31 #ifndef CPL_ATOMIC_OPS_INCLUDED
32 #define CPL_ATOMIC_OPS_INCLUDED
33
34 #include "cpl_port.h"
35
36 CPL_C_START
37
61 int CPL_DLL CPLAtomicAdd(volatile int* ptr, int increment);
62
72 #define CPLAtomicInc(ptr) CPLAtomicAdd(ptr, 1)
73
83 #define CPLAtomicDec(ptr) CPLAtomicAdd(ptr, -1)
84
101 int CPLAtomicCompareAndExchange(volatile int* ptr, int oldval, int newval);
102
103 CPL_C_END
104
105 #endif /* CPL_ATOMIC_OPS_INCLUDED */
CPL_C_START
#define CPL_C_START
Macro to start a block of C symbols.
Definition: cpl_port.h:304
CPL_C_END
#define CPL_C_END
Macro to end a block of C symbols.
Definition: cpl_port.h:306
cpl_port.h