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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:19:15 +0000 |
| commit | 6eb9c5a5657d1fe77b55cc261450f3538d35a94d (patch) | |
| tree | 657d8194422a5daccecfd42d654b8a245ef7b4c8 /src/include/executor/tqueue.h | |
| parent | Initial commit. (diff) | |
| download | postgresql-13-6eb9c5a5657d1fe77b55cc261450f3538d35a94d.tar.xz postgresql-13-6eb9c5a5657d1fe77b55cc261450f3538d35a94d.zip | |
Adding upstream version 13.4.upstream/13.4upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/include/executor/tqueue.h')
| -rw-r--r-- | src/include/executor/tqueue.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/include/executor/tqueue.h b/src/include/executor/tqueue.h new file mode 100644 index 0000000..93655ef --- /dev/null +++ b/src/include/executor/tqueue.h @@ -0,0 +1,32 @@ +/*------------------------------------------------------------------------- + * + * tqueue.h + * Use shm_mq to send & receive tuples between parallel backends + * + * Portions Copyright (c) 1996-2020, 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 HeapTuple TupleQueueReaderNext(TupleQueueReader *reader, + bool nowait, bool *done); + +#endif /* TQUEUE_H */ |