C:/Active/libraries/cxutils/2.0/include/cxutils/ipc/mappedmemory.h
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00001 00002 00003 00004 00005 00006 00007 00008 00009 00010 00011 00012 00013 00014 00015 00016 00017 00018 00019 00020 00021 00022 00023 00024 00025 00026 00027 00028 00029 00030 00031 00032 00033 00034 00035 00036 00037 00038 00039 00040 00041 #ifndef _CXUTILS_IPC_MAPPED_MEMORY_H 00042 #define _CXUTILS_IPC_MAPPED_MEMORY_H 00043 00044 #include <limits.h> 00045 #include <assert.h> 00046 00047 #include "cxutils/cxbase.h" 00048 #include "cxutils/packet.h" 00049 #include "cxutils/mutex.h" 00050 #include "cxutils/time.h" 00051 00052 namespace CxUtils 00053 { 00066 class CX_UTILS_DLL MappedMemory 00067 { 00068 public: 00069 static const unsigned ReadAccess = 1; 00070 static const unsigned int ReadWriteAccess = 2; 00071 static const unsigned int MemoryNameSize = 128; 00072 typedef unsigned long long int ID; 00073 MappedMemory(); 00074 virtual ~MappedMemory(); 00075 int OpenMappedMemory(const ID id, 00076 const unsigned int access = ReadWriteAccess, 00077 const unsigned int expectedSize = 0); 00078 int OpenMappedMemory(const std::string& name, 00079 const unsigned int access = ReadWriteAccess, 00080 const unsigned int expectedSize = 0); 00081 int CreateMappedMemory(const ID id, 00082 const unsigned int size); 00083 int CreateMappedMemory(const std::string& name, 00084 const unsigned int size); 00085 int CloseMappedMemory(); 00086 static int DeleteMappedMemory(const std::string& name); 00087 int Lock(unsigned long wait = INFINITE) const; 00088 int Unlock() const; 00089 Packet* operator->(); 00090 const Packet* operator->() const; 00091 Packet* GetData(); 00092 const Packet* GetData() const; 00093 int Copy(const unsigned int p1, const unsigned int p2); 00094 bool IsOpen() const; 00095 static bool IsMemOpen(const std::string& name); 00096 unsigned char* GetMemory(); 00097 const unsigned char* GetMemory() const; 00098 const std::string GetMappedName() const { return std::string(mMappedName); } 00099 unsigned int Length() const; 00100 private: 00101 #ifdef WIN32 00102 void* mFileMapping; 00103 void* mFileSizeMapping; 00104 unsigned char* mpMemorySizePtr; 00105 #else 00106 int mFileMapping; 00107 bool mCreatedFlag; 00108 #endif 00109 Mutex* mpMemMutex; 00110 char mMappedName[MemoryNameSize]; 00111 unsigned int mWriteAccess; 00112 unsigned char* mpMemory; 00113 unsigned int mLength; 00114 Packet::Wrapper mPacket; 00115 }; 00116 } 00117 00118 #endif 00119 00120 /* End of File */
