Panda3D
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00001 // Filename: atomicAdjustPosixImpl.h 00002 // Created by: drose (10Feb06) 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 ATOMICADJUSTPOSIXIMPL_H 00016 #define ATOMICADJUSTPOSIXIMPL_H 00017 00018 #include "dtoolbase.h" 00019 #include "selectThreadImpl.h" 00020 00021 #ifdef HAVE_POSIX_THREADS 00022 00023 #include "numeric_types.h" 00024 00025 #include <pthread.h> 00026 00027 //////////////////////////////////////////////////////////////////// 00028 // Class : AtomicAdjustPosixImpl 00029 // Description : Uses POSIX to implement atomic adjustments. 00030 //////////////////////////////////////////////////////////////////// 00031 class EXPCL_DTOOL AtomicAdjustPosixImpl { 00032 public: 00033 // In Posix, "long" is generally the native word size (32- or 00034 // 64-bit), which is what we'd prefer. 00035 typedef long Integer; 00036 typedef void *Pointer; 00037 00038 INLINE static void inc(TVOLATILE Integer &var); 00039 INLINE static bool dec(TVOLATILE Integer &var); 00040 INLINE static void add(TVOLATILE Integer &var, Integer delta); 00041 INLINE static Integer set(TVOLATILE Integer &var, Integer new_value); 00042 INLINE static Integer get(const TVOLATILE Integer &var); 00043 00044 INLINE static Pointer set_ptr(TVOLATILE Pointer &var, Pointer new_value); 00045 INLINE static Pointer get_ptr(const TVOLATILE Pointer &var); 00046 00047 INLINE static Integer compare_and_exchange(TVOLATILE Integer &mem, 00048 Integer old_value, 00049 Integer new_value); 00050 00051 INLINE static Pointer compare_and_exchange_ptr(TVOLATILE Pointer &mem, 00052 Pointer old_value, 00053 Pointer new_value); 00054 00055 private: 00056 static pthread_mutex_t _mutex; 00057 }; 00058 00059 #include "atomicAdjustPosixImpl.I" 00060 00061 #endif // HAVE_POSIX_THREADS 00062 00063 #endif