33 lines
1.0 KiB
C
33 lines
1.0 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* tqueue.h
|
|
* Use shm_mq to send & receive tuples between parallel backends
|
|
*
|
|
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* src/include/executor/tqueue.h
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef TQUEUE_H
|
|
#define TQUEUE_H
|
|
|
|
#include "storage/shm_mq.h"
|
|
#include "tcop/dest.h"
|
|
|
|
/* Opaque struct, only known inside tqueue.c. */
|
|
typedef struct TupleQueueReader TupleQueueReader;
|
|
|
|
/* Use this to send tuples to a shm_mq. */
|
|
extern DestReceiver *CreateTupleQueueDestReceiver(shm_mq_handle *handle);
|
|
|
|
/* Use these to receive tuples from a shm_mq. */
|
|
extern TupleQueueReader *CreateTupleQueueReader(shm_mq_handle *handle);
|
|
extern void DestroyTupleQueueReader(TupleQueueReader *reader);
|
|
extern MinimalTuple TupleQueueReaderNext(TupleQueueReader *reader,
|
|
bool nowait, bool *done);
|
|
|
|
#endif /* TQUEUE_H */
|