Panda3D

lightMutexDirect.h

00001 // Filename: lightMutexDirect.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 LIGHTMUTEXDIRECT_H
00016 #define LIGHTMUTEXDIRECT_H
00017 
00018 #include "pandabase.h"
00019 #include "mutexImpl.h"
00020 
00021 class Thread;
00022 
00023 #ifndef DEBUG_THREADS
00024 
00025 ////////////////////////////////////////////////////////////////////
00026 //       Class : LightMutexDirect
00027 // Description : This class implements a lightweight Mutex by making
00028 //               direct calls to the underlying implementation layer.
00029 //               It doesn't perform any debugging operations.
00030 ////////////////////////////////////////////////////////////////////
00031 class EXPCL_PANDA_PIPELINE LightMutexDirect {
00032 protected:
00033   INLINE LightMutexDirect();
00034   INLINE ~LightMutexDirect();
00035 private:
00036   INLINE LightMutexDirect(const LightMutexDirect &copy);
00037   INLINE void operator = (const LightMutexDirect &copy);
00038 
00039 PUBLISHED:
00040   BLOCKING INLINE void acquire() const;
00041   INLINE void release() const;
00042   INLINE bool debug_is_locked() const;
00043 
00044   INLINE void set_name(const string &name);
00045   INLINE void clear_name();
00046   INLINE bool has_name() const;
00047   INLINE string get_name() const;
00048 
00049   void output(ostream &out) const;
00050 
00051 private:
00052 #ifdef DO_PSTATS
00053   // When PStats is compiled in, we use the full implementation of
00054   // LightMutex, even in the SIMPLE_THREADS case.  We have to do this
00055   // since any PStatTimer call may trigger a context switch, and any
00056   // low-level context switch requires all containing mutexes to be
00057   // true mutexes.
00058   MutexTrueImpl _impl;
00059 #else
00060   MutexImpl _impl;
00061 #endif  // DO_PSTATS
00062 };
00063 
00064 INLINE ostream &
00065 operator << (ostream &out, const LightMutexDirect &m) {
00066   m.output(out);
00067   return out;
00068 }
00069 
00070 #include "lightMutexDirect.I"
00071 
00072 #endif  // !DEBUG_THREADS
00073 
00074 #endif
 All Classes Functions Variables Enumerations