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Provide DSM segment to ExecXXXInitializeWorker functions.

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
This commit is contained in:
Andres Freund
2017-11-16 17:28:11 -08:00
parent 09a777447a
commit 7082e614c0
17 changed files with 55 additions and 33 deletions

View File

@@ -25,7 +25,8 @@ extern void ExecReScanIndexScan(IndexScanState *node);
extern void ExecIndexScanEstimate(IndexScanState *node, ParallelContext *pcxt);
extern void ExecIndexScanInitializeDSM(IndexScanState *node, ParallelContext *pcxt);
extern void ExecIndexScanReInitializeDSM(IndexScanState *node, ParallelContext *pcxt);
extern void ExecIndexScanInitializeWorker(IndexScanState *node, shm_toc *toc);
extern void ExecIndexScanInitializeWorker(IndexScanState *node,
ParallelWorkerContext *pwcxt);
/*
* These routines are exported to share code with nodeIndexonlyscan.c and