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Function members

• Default
  • SHM_BUFF_SIZE : 16 kByte
  • ANSHMKEY : 17001
  • ANSEMKEY : 18001

• BABIRL mode
  • SHM_BUFF_SIZE : 256 kByte
  • ANSHMKEY : 561000
  • ANSEMKEY : 561001

public

• TArtSharedMemoryDataSource()
• ~TArtSharedMemoryDataSource()
• int GetRunNumber()
• bool SMOpen(const int sid)
• void Close()
• ArtBlockStat_t GetNextBlock()
• int Read(char *buf, const int &size, const int &offset)
• virtual int Seek(long offset, int origin)
• virtual int IsPrepared()
• virtual int Wait()

private

• TArtSharedMemory *fSharedMemory
• TArtSemaphore *fSemaphore
• unsigned int fNBlock
  Number of Block.
• unsigned int fMemoryPos
  Pointer to memory.
• int fRunNumber
  Run number.

Function documents

• ~TArtSharedMemoryDataSource()
  Call Close() function.
• int GetRunNumber()
  Return fRunNumber.
• bool SMOpen(const int sid)
  Generate shared memory and semaphore associated sid. Return result.
• void Close()
  Delete fSharedMemory and fSemaphore.
• ArtBlockStat_t GetNextBlock()
  Read a data block from the shared memory, and identify the type of data.
  Return the block status.
• int Read(char *buf, const int &size, const int &offset)
  Read data from shared memory, and assign the data to buf associated offset.
  Return the length of buf.
• int Seek(long offset, int origin)
  If origin is SEEK_SET, offset is assigned to fMemoryPos.
  If origin is SEEK_CUR, offset is added to fMemoryPos.
  If origin is SEEK_END, shared memory size is assigned to fMemoryPos.
  
• int IsPrepared()
  Check a current status of a shared memory.
  If the memory is prepared, return 1.
• int Wait()
  Unlock the semaphore.