00001 /*========================================================================= 00002 00003 Program: Visualization Toolkit 00004 Module: $RCSfile: vtkCriticalSection.h,v $ 00005 Language: C++ 00006 00007 Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen 00008 All rights reserved. 00009 See Copyright.txt or http://www.kitware.com/Copyright.htm for details. 00010 00011 This software is distributed WITHOUT ANY WARRANTY; without even 00012 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 00013 PURPOSE. See the above copyright notice for more information. 00014 00015 =========================================================================*/ 00052 #ifndef __vtkCriticalSection_h 00053 #define __vtkCriticalSection_h 00054 00055 #include "vtkObject.h" 00056 00057 //BTX 00058 00059 #ifdef VTK_USE_SPROC 00060 #include <abi_mutex.h> // Needed for sproc implementation of mutex 00061 typedef abilock_t vtkCritSecType; 00062 #endif 00063 00064 #if defined(VTK_USE_PTHREADS) || defined(VTK_HP_PTHREADS) 00065 #include <pthread.h> // Needed for pthreads implementation of mutex 00066 typedef pthread_mutex_t vtkCritSecType; 00067 #endif 00068 00069 #ifdef VTK_USE_WIN32_THREADS 00070 #include <winbase.h> // Needed for win32 implementation of mutex 00071 typedef CRITICAL_SECTION vtkCritSecType; 00072 #endif 00073 00074 #ifndef VTK_USE_SPROC 00075 #ifndef VTK_USE_PTHREADS 00076 #ifndef VTK_USE_WIN32_THREADS 00077 typedef int vtkCritSecType; 00078 #endif 00079 #endif 00080 #endif 00081 00082 // Critical Section object that is not a vtkObject. 00083 class VTK_COMMON_EXPORT vtkSimpleCriticalSection 00084 { 00085 public: 00086 vtkSimpleCriticalSection() 00087 { 00088 this->Init(); 00089 } 00090 00091 vtkSimpleCriticalSection(int isLocked) 00092 { 00093 this->Init(); 00094 if(isLocked) 00095 { 00096 this->Lock(); 00097 } 00098 } 00099 00100 void Init(); 00101 00102 virtual ~vtkSimpleCriticalSection(); 00103 00104 static vtkSimpleCriticalSection *New(); 00105 00106 // What's the point of these (here and in MutexLock)? This class 00107 // is not part of the hierarchy!! -CRV 00108 virtual const char *GetClassName() {return "vtkSimpleCriticalSection";}; 00109 virtual int IsA(const char *name); 00110 static vtkSimpleCriticalSection *SafeDownCast(vtkSimpleCriticalSection *o); 00111 00112 void Delete() {delete this;} 00113 00115 void Lock( void ); 00116 00118 void Unlock( void ); 00119 00120 protected: 00121 vtkCritSecType CritSec; 00122 }; 00123 00124 //ETX 00125 00126 class VTK_COMMON_EXPORT vtkCriticalSection : public vtkObject 00127 { 00128 public: 00129 static vtkCriticalSection *New(); 00130 00131 vtkTypeRevisionMacro(vtkCriticalSection,vtkObject); 00132 void PrintSelf(ostream& os, vtkIndent indent); 00133 00135 void Lock( void ); 00136 00138 void Unlock( void ); 00139 00140 protected: 00141 vtkSimpleCriticalSection SimpleCriticalSection; 00142 vtkCriticalSection() {}; 00143 private: 00144 vtkCriticalSection(const vtkCriticalSection&); // Not implemented. 00145 void operator=(const vtkCriticalSection&); // Not implemented. 00146 }; 00147 00148 00149 inline void vtkCriticalSection::Lock( void ) 00150 { 00151 this->SimpleCriticalSection.Lock(); 00152 } 00153 00154 inline void vtkCriticalSection::Unlock( void ) 00155 { 00156 this->SimpleCriticalSection.Unlock(); 00157 } 00158 00159 #endif