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Previously, executor nodes running in parallel worker processes didn't have access to the dsm_segment object used for parallel execution. In order to support resource management based on DSM segment lifetime, they need that. So create a ParallelWorkerContext object to hold it and pass it to all InitializeWorker functions. Author: Thomas Munro Reviewed-By: Andres Freund Discussion: https://postgr.es/m/CAEepm=2W=cOkiZxcg6qiFQP-dHUe09aqTrEMM7yJDrHMhDv_RA@mail.gmail.com
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* ------------------------------------------------------------------------
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*
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* nodeCustom.h
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*
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* prototypes for CustomScan nodes
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*
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* Portions Copyright (c) 1996-2017, 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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* ------------------------------------------------------------------------
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*/
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#ifndef NODECUSTOM_H
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#define NODECUSTOM_H
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#include "access/parallel.h"
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#include "nodes/execnodes.h"
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#include "nodes/extensible.h"
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/*
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* General executor code
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*/
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extern CustomScanState *ExecInitCustomScan(CustomScan *custom_scan,
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EState *estate, int eflags);
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extern void ExecEndCustomScan(CustomScanState *node);
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extern void ExecReScanCustomScan(CustomScanState *node);
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extern void ExecCustomMarkPos(CustomScanState *node);
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extern void ExecCustomRestrPos(CustomScanState *node);
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/*
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* Parallel execution support
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*/
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extern void ExecCustomScanEstimate(CustomScanState *node,
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ParallelContext *pcxt);
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extern void ExecCustomScanInitializeDSM(CustomScanState *node,
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ParallelContext *pcxt);
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extern void ExecCustomScanReInitializeDSM(CustomScanState *node,
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ParallelContext *pcxt);
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extern void ExecCustomScanInitializeWorker(CustomScanState *node,
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ParallelWorkerContext *pwcxt);
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extern void ExecShutdownCustomScan(CustomScanState *node);
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#endif /* NODECUSTOM_H */
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