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common/vtkCriticalSection.h

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00001 /*=========================================================================
00002 
00003   Program:   Visualization Toolkit
00004   Module:    $RCSfile: vtkCriticalSection.h,v $
00005   Language:  C++
00006 
00007 
00008 Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
00009 All rights reserved.
00010 
00011 Redistribution and use in source and binary forms, with or without
00012 modification, are permitted provided that the following conditions are met:
00013 
00014  * Redistributions of source code must retain the above copyright notice,
00015    this list of conditions and the following disclaimer.
00016 
00017  * Redistributions in binary form must reproduce the above copyright notice,
00018    this list of conditions and the following disclaimer in the documentation
00019    and/or other materials provided with the distribution.
00020 
00021  * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
00022    of any contributors may be used to endorse or promote products derived
00023    from this software without specific prior written permission.
00024 
00025  * Modified source versions must be plainly marked as such, and must not be
00026    misrepresented as being the original software.
00027 
00028 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00029 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00030 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00031 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
00032 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00033 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00034 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00035 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00036 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00037 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00038 
00039 =========================================================================*/
00063 #ifndef __vtkCriticalSection_h
00064 #define __vtkCriticalSection_h
00065 
00066 #include "vtkObject.h"
00067 
00068 //BTX
00069 
00070 #ifdef VTK_USE_SPROC
00071 #include <abi_mutex.h>
00072 typedef abilock_t vtkCritSecType;
00073 #endif
00074 
00075 #ifdef VTK_USE_PTHREADS
00076 #include <pthread.h>
00077 typedef pthread_mutex_t vtkCritSecType;
00078 #endif
00079  
00080 #ifdef _WIN32
00081 #include <winbase.h>
00082 typedef CRITICAL_SECTION vtkCritSecType;
00083 #endif
00084 
00085 #ifndef VTK_USE_SPROC
00086 #ifndef VTK_USE_PTHREADS
00087 #ifndef _WIN32
00088 typedef int vtkCritSecType;
00089 #endif
00090 #endif
00091 #endif
00092 
00093 // Critical Section object that is not a vtkObject.
00094 class VTK_EXPORT vtkSimpleCriticalSection
00095 {
00096 public:
00097   vtkSimpleCriticalSection();
00098   virtual ~vtkSimpleCriticalSection();
00099 
00100   static vtkSimpleCriticalSection *New();
00101 
00102   // What's the point of these (here and in MutexLock)? This class
00103   // is not part of the hierarchy!! -CRV
00104   virtual const char *GetClassName() {return "vtkSimpleCriticalSection";};
00105   virtual int IsA(const char *name);
00106   static vtkSimpleCriticalSection *SafeDownCast(vtkSimpleCriticalSection *o);
00107 
00108   void Delete() {delete this;}
00109   
00111   void Lock( void );
00112 
00114   void Unlock( void );
00115 
00116 protected:
00117   vtkCritSecType   CritSec;
00118 };
00119 
00120 //ETX
00121 
00122 class VTK_EXPORT vtkCriticalSection : public vtkObject
00123 {
00124 public:
00125   static vtkCriticalSection *New();
00126 
00127   vtkTypeMacro(vtkCriticalSection,vtkObject);
00128   void PrintSelf(ostream& os, vtkIndent indent);
00129   
00131   void Lock( void );
00132 
00134   void Unlock( void );
00135 
00136 protected:
00137   vtkSimpleCriticalSection   SimpleCriticalSection;
00138 };
00139 
00140 
00141 inline void vtkCriticalSection::Lock( void )
00142 {
00143   this->SimpleCriticalSection.Lock();
00144 }
00145 
00146 inline void vtkCriticalSection::Unlock( void )
00147 {
00148   this->SimpleCriticalSection.Unlock();
00149 }
00150 
00151 #endif

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