ST_SMIMessageQueue

TYPE ST_SMIMessageQueue :
STRUCT
  arrBuffer                    : ARRAY [1..SMI_COMMAND_BUFFER_ENTRIES] OF ST_SMIMessageQueueItem;
  byBufferReadPointer          : BYTE;
  byBufferWritePointer         : BYTE;
  byBufferDemandCounter        : BYTE;
  byBufferMaximumDemandCounter : BYTE;
  uiBufferOverflowCounter      : UINT;
  bLockSemaphore               : BOOL;
END_STRUCT
END_TYPE