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- /*--------------------------------------------------------------------
- * execParallel.h
- * POSTGRES parallel execution interface
- *
- * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * IDENTIFICATION
- * src/include/executor/execParallel.h
- *--------------------------------------------------------------------
- */
-
- #ifndef EXECPARALLEL_H
- #define EXECPARALLEL_H
-
- #include "access/parallel.h"
- #include "nodes/execnodes.h"
- #include "nodes/parsenodes.h"
- #include "nodes/plannodes.h"
- #include "utils/dsa.h"
-
- typedef struct SharedExecutorInstrumentation SharedExecutorInstrumentation;
-
- typedef struct ParallelExecutorInfo
- {
- PlanState *planstate; /* plan subtree we're running in parallel */
- ParallelContext *pcxt; /* parallel context we're using */
- BufferUsage *buffer_usage; /* points to bufusage area in DSM */
- SharedExecutorInstrumentation *instrumentation; /* optional */
- struct SharedJitInstrumentation *jit_instrumentation; /* optional */
- dsa_area *area; /* points to DSA area in DSM */
- dsa_pointer param_exec; /* serialized PARAM_EXEC parameters */
- bool finished; /* set true by ExecParallelFinish */
- /* These two arrays have pcxt->nworkers_launched entries: */
- shm_mq_handle **tqueue; /* tuple queues for worker output */
- struct TupleQueueReader **reader; /* tuple reader/writer support */
- } ParallelExecutorInfo;
-
- extern ParallelExecutorInfo *ExecInitParallelPlan(PlanState *planstate,
- EState *estate, Bitmapset *sendParam, int nworkers,
- int64 tuples_needed);
- extern void ExecParallelCreateReaders(ParallelExecutorInfo *pei);
- extern void ExecParallelFinish(ParallelExecutorInfo *pei);
- extern void ExecParallelCleanup(ParallelExecutorInfo *pei);
- extern void ExecParallelReinitialize(PlanState *planstate,
- ParallelExecutorInfo *pei, Bitmapset *sendParam);
-
- extern void ParallelQueryMain(dsm_segment *seg, shm_toc *toc);
-
- #endif /* EXECPARALLEL_H */
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