32 lines
1.0 KiB
C
32 lines
1.0 KiB
C
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/*-------------------------------------------------------------------------
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*
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* tqueue.h
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* Use shm_mq to send & receive tuples between parallel backends
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*
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* Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/executor/tqueue.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef TQUEUE_H
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#define TQUEUE_H
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#include "storage/shm_mq.h"
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#include "tcop/dest.h"
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/* Use this to send tuples to a shm_mq. */
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extern DestReceiver *CreateTupleQueueDestReceiver(shm_mq_handle *handle);
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/* Use these to receive tuples from a shm_mq. */
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typedef struct TupleQueueFunnel TupleQueueFunnel;
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extern TupleQueueFunnel *CreateTupleQueueFunnel(void);
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extern void DestroyTupleQueueFunnel(TupleQueueFunnel *funnel);
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extern void RegisterTupleQueueOnFunnel(TupleQueueFunnel *, shm_mq_handle *);
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extern HeapTuple TupleQueueFunnelNext(TupleQueueFunnel *, bool nowait,
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bool *done);
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#endif /* TQUEUE_H */
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