StreamOpcode

Stream operation code enumeration.

Synopsis

typedef enum StreamOpcode {
   kStreamOpData 0,
   kStreamOpGetChan,
   kStreamOpSetChan,
   kStreamOpControl,
   kStreamOpSync,
   kStreamOpStart,
   kStreamOpStop,
   kStreamOpOpening,
   kStreamOpClosing,
   kStreamOpEOF,
   kStreamOpAbort
}

Description

Opcode values as passed in whatToDo

Fields

kStreamOpData: 0; new data has arrived.

kStreamOpGetChan: Get logical channel status.

kStreamOpSetChan: Set logical channel status.

kStreamOpControl: Perform subscriber defined function.

kStreamOpSync: Clock stream resynched the clock.

kStreamOpStart: Stream is being started.

kStreamOpStop: Stream is being stopped.

The following messages have no extended message arguments and only may use the whatToDo and context fields in the following message record.

kStreamOpOpening: One-time initialization call from DSH.

kStreamOpClosing: Stream is being closed.

kStreamOpEOF: Physical end of file on data, no more to come.

kStreamOpAbort: Some subscriber gave up, streaming is aborted.

Associated Files

DataStream.h