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csutil/threading/atomicops_gcc_generic.h
00001 /*
00002   Copyright (C) 2010 by Stefano Angeleri
00003 
00004   This library is free software; you can redistribute it and/or
00005   modify it under the terms of the GNU Lesser General Public
00006   License as published by the Free Software Foundation; either
00007   version 2 of the License, or (at your option) any later version.
00008 
00009   This library is distributed in the hope that it will be useful,
00010   but WITHOUT ANY WARRANTY; without even the implied warranty of
00011   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012   Library General Public License for more details.
00013 
00014   You should have received a copy of the GNU Library General Public
00015   License along with this library; if not, write to the Free
00016   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __CS_CSUTIL_ATOMICOPS_GCC_GENERIC_H__
00020 #define __CS_CSUTIL_ATOMICOPS_GCC_GENERIC_H__
00021 
00022 #ifndef DOXYGEN_RUN
00023 
00024 namespace CS
00025 {
00026 namespace Threading
00027 {
00028   class CS_CRYSTALSPACE_EXPORT AtomicOperationsGenericGCC
00029   {
00030     public:
00031     inline static int32 Set (int32* target, int32 value)
00032     {
00033       return __sync_lock_test_and_set (target, value);
00034     }
00035 
00036     inline static void* Set (void** target, void* value)
00037     {
00038       return __sync_lock_test_and_set (target, value);
00039     }
00040 
00041     inline static int32 CompareAndSet (int32* target, int32 value,
00042       int32 comparand)
00043     {
00044       return __sync_val_compare_and_swap (target, comparand, value);
00045     }
00046 
00047     inline static void* CompareAndSet (void** target, void* value,
00048       void* comparand)
00049     {
00050       return __sync_val_compare_and_swap (target, comparand, value);
00051     }
00052 
00053     inline static int32 Increment (int32* target, register int32 incr = 1)
00054     {
00055       return __sync_fetch_and_add (target, incr);
00056     }
00057 
00058     inline static int32 Decrement (int32* target)
00059     {
00060       return __sync_fetch_and_sub (target, 1);
00061     }
00062   };
00063 }
00064 }
00065 
00066 #endif // DOXYGEN_RUN
00067 
00068 #endif // __CS_CSUTIL_ATOMICOPS_GCC_GENERIC_H__

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