ITK: itkSemaphore.h Source File

00001 /*========================================================================= 00002 00003 Program: Insight Segmentation & Registration Toolkit 00004 Module: $RCSfile: itkSemaphore.h,v $ 00005 Language: C++ 00006 Date: $Date: 2003/09/10 14:29:25 $ 00007 Version: $Revision: 1.10 $ 00008 00009 Copyright (c) Insight Software Consortium. All rights reserved. 00010 See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. 00011 00012 This software is distributed WITHOUT ANY WARRANTY; without even 00013 the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 00014 PURPOSE. See the above copyright notices for more information. 00015 00016 =========================================================================*/ 00017 #ifndef __itkSemaphore_h_ 00018 #define __itkSemaphore_h_ 00019 00020 #include "itkObjectFactory.h" 00021 #include "itkLightObject.h" 00022 #include "itkConfigure.h" 00023 #include <string> 00024 00025 #ifdef ITK_USE_UNIX_IPC_SEMAPHORES 00026 #include "itkMutexLock.h" 00027 #include <stdio.h> 00028 #include <sys/types.h> 00029 #include <sys/ipc.h> 00030 #include <sys/sem.h> 00031 #include <errno.h> 00032 #endif 00033 00034 #ifndef ITK_USE_UNIX_IPC_SEMAPHORES 00035 #ifdef ITK_USE_SPROC 00036 #include "itkMultiThreader.h" 00037 #include <ulocks.h> 00038 #endif 00039 #ifdef ITK_USE_PTHREADS 00040 #ifdef sun 00041 #include <synch.h> 00042 #else 00043 #include <semaphore.h> 00044 #endif 00045 #endif 00046 #endif 00047 00048 #ifdef ITK_USE_WIN32_THREADS 00049 #include "itkWindows.h" 00050 #endif 00051 00052 namespace itk { 00053 00054 #ifdef ITK_USE_UNIX_IPC_SEMAPHORES 00055 typedef int SemaphoreType; 00056 #endif 00057 00058 #ifndef ITK_USE_UNIX_IPC_SEMAPHORES 00059 #ifdef ITK_USE_SPROC 00060 typedef usema_t * SemaphoreType; 00061 #endif 00062 #ifdef ITK_USE_PTHREADS 00063 #ifdef sun 00064 typedef sema_t SemaphoreType; 00065 #else 00066 #ifdef __APPLE__ 00067 typedef sem_t *SemaphoreType; 00068 #else 00069 typedef sem_t SemaphoreType; 00070 #endif 00071 #endif 00072 #endif 00073 #endif 00074 00075 #ifdef ITK_USE_WIN32_THREADS 00076 typedef HANDLE SemaphoreType; 00077 #endif 00078 00079 #ifndef ITK_USE_UNIX_IPC_SEMAPHORES 00080 #ifndef ITK_USE_SPROC 00081 #ifndef ITK_USE_PTHREADS 00082 #ifndef ITK_USE_WIN32_THREADS 00083 typedef int SemaphoreType; 00084 #endif 00085 #endif 00086 #endif 00087 #endif 00088 00112 class ITKCommon_EXPORT Semaphore : public LightObject 00113 { 00114 public: 00116 typedef Semaphore Self; 00117 typedef LightObject Superclass; 00118 typedef SmartPointer<Self> Pointer; 00119 typedef SmartPointer<const Self> ConstPointer; 00120 00122 itkNewMacro(Self); 00123 00125 itkTypeMacro(Semaphore, LightObject); 00126 00128 void Initialize(unsigned int value); 00129 00132 void Up(); 00133 00139 void Down(); 00140 00142 void Remove (); 00143 00144 protected: 00145 Semaphore (); 00146 ~Semaphore(); 00147 00148 private: 00149 00150 #ifdef ITK_USE_UNIX_IPC_SEMAPHORES 00151 00153 static int m_IPCSemaphoreKey; 00155 static SimpleMutexLock m_Mutex; 00156 00157 int UnixIpcSemaphoreCreate (int unix_semaphore_key); 00158 void UnixIpcSemaphoreRemove (int sid); 00159 void UnixIpcSemaphoreCall (int sid, int op); 00160 void UnixIpcSemaphoreDown (int sid); 00161 void UnixIpcSemaphoreUp (int sid); 00162 #endif 00163 00164 char Pad1[128]; // to avoid false sharing in case of shared memory multiprocessor systems 00165 SemaphoreType m_Sema; 00166 char Pad2[128]; // to avoid false sharing in case of shared memory multiprocessor systems 00167 00168 #ifdef __APPLE__ 00169 std::string GetUniqueName(); 00170 static int m_SemaphoreCount; 00171 std::string m_SemaphoreName; 00172 #endif 00173 00174 }; 00175 00176 }//itk 00177 00178 #endif