Panda3D
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00001 // Filename: atomicAdjustI386Impl.h 00002 // Created by: drose (01Apr06) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 00015 #ifndef ATOMICADJUSTI386IMPL_H 00016 #define ATOMICADJUSTI386IMPL_H 00017 00018 #include "dtoolbase.h" 00019 #include "selectThreadImpl.h" 00020 00021 #if defined(__i386__) || defined(_M_IX86) 00022 00023 #include "numeric_types.h" 00024 00025 //////////////////////////////////////////////////////////////////// 00026 // Class : AtomicAdjustI386Impl 00027 // Description : Uses assembly-language calls to atomically increment 00028 // and decrement. Although this class is named i386, it 00029 // actually uses instructions that are specific to 486 00030 // and higher. 00031 //////////////////////////////////////////////////////////////////// 00032 class EXPCL_DTOOL AtomicAdjustI386Impl { 00033 public: 00034 typedef PN_int32 Integer; 00035 00036 INLINE static void inc(TVOLATILE Integer &var); 00037 INLINE static bool dec(TVOLATILE Integer &var); 00038 INLINE static void add(TVOLATILE Integer &var, Integer delta); 00039 INLINE static Integer set(TVOLATILE Integer &var, Integer new_value); 00040 INLINE static Integer get(const TVOLATILE Integer &var); 00041 00042 INLINE static void *set_ptr(void * TVOLATILE &var, void *new_value); 00043 INLINE static void *get_ptr(void * const TVOLATILE &var); 00044 00045 INLINE static Integer compare_and_exchange(TVOLATILE Integer &mem, 00046 Integer old_value, 00047 Integer new_value); 00048 00049 INLINE static void *compare_and_exchange_ptr(void * TVOLATILE &mem, 00050 void *old_value, 00051 void *new_value); 00052 }; 00053 00054 #include "atomicAdjustI386Impl.I" 00055 00056 #endif // __i386__ 00057 00058 #endif