blob: 440178bc7c29a0bef973a4fa993c5ca296975849 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/*-------------------------------------------------------------------------
*
* tqueue.h
* Use shm_mq to send & receive tuples between parallel backends
*
* Portions Copyright (c) 1996-2023, 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 */
|
