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Provide DSM segment to ExecXXXInitializeWorker functions.

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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
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
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6
src/include/access/parallel.h
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@ -45,6 +45,12 @@ typedef struct ParallelContext
ParallelWorkerInfo *worker;
} ParallelContext;
typedef struct ParallelWorkerContext
{
dsm_segment *seg;
shm_toc *toc;
} ParallelWorkerContext;
extern volatile bool ParallelMessagePending;
extern int ParallelWorkerNumber;
extern bool InitializingParallelWorker;