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lightMutex.h
00001 // Filename: lightMutex.h
00002 // Created by:  drose (08Oct08)
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 LIGHTMUTEX_H
00016 #define LIGHTMUTEX_H
00017 
00018 #include "pandabase.h"
00019 #include "mutexDebug.h"
00020 #include "lightMutexDirect.h"
00021 
00022 ////////////////////////////////////////////////////////////////////
00023 //       Class : LightMutex
00024 // Description : This is a standard, non-reentrant mutex, similar to
00025 //               the Mutex class.  It is different from Mutex in the
00026 //               case of SIMPLE_THREADS: in this case, the LightMutex
00027 //               class compiles to nothing; it performs no locking
00028 //               whatsoever.  It is therefore useful only to protect
00029 //               very small sections of code, during which you are
00030 //               confident there will be no thread yields.
00031 //
00032 //               In the normal, system-threaded implementation, this
00033 //               class is exactly the same as Mutex.
00034 //
00035 //               ConditionVars cannot be used with LightMutex; they
00036 //               work only with Mutex.
00037 //
00038 //               This class inherits its implementation either from
00039 //               MutexDebug or LightMutexDirect, depending on the
00040 //               definition of DEBUG_THREADS.
00041 ////////////////////////////////////////////////////////////////////
00042 #ifdef DEBUG_THREADS
00043 class EXPCL_PANDA_PIPELINE LightMutex : public MutexDebug
00044 #else
00045 class EXPCL_PANDA_PIPELINE LightMutex : public LightMutexDirect
00046 #endif  // DEBUG_THREADS
00047 {
00048 PUBLISHED:
00049   INLINE LightMutex();
00050 public:
00051   INLINE LightMutex(const char *name);
00052 PUBLISHED:
00053   INLINE LightMutex(const string &name);
00054   INLINE ~LightMutex();
00055 private:
00056   INLINE LightMutex(const LightMutex &copy);
00057   INLINE void operator = (const LightMutex &copy);
00058 };
00059 
00060 #include "lightMutex.I"
00061 
00062 #endif
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