88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*-------------------------------------------------------------------------
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*
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* parallel.h
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*
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* Parallel support header file for the pg_dump archiver
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*
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* Portions Copyright (c) 1996-2016, 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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* The author is not responsible for loss or damages that may
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* result from its use.
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*
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* IDENTIFICATION
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* src/bin/pg_dump/parallel.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_DUMP_PARALLEL_H
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#define PG_DUMP_PARALLEL_H
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#include "pg_backup_archiver.h"
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typedef enum
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{
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WRKR_TERMINATED = 0,
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WRKR_IDLE,
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WRKR_WORKING,
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WRKR_FINISHED
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} T_WorkerStatus;
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/* Arguments needed for a worker process */
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typedef struct ParallelArgs
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{
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ArchiveHandle *AH;
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TocEntry *te;
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} ParallelArgs;
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/* State for each parallel activity slot */
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typedef struct ParallelSlot
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{
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ParallelArgs *args;
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T_WorkerStatus workerStatus;
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int status;
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int pipeRead; /* master's end of the pipes */
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int pipeWrite;
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int pipeRevRead; /* child's end of the pipes */
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int pipeRevWrite;
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#ifdef WIN32
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uintptr_t hThread;
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unsigned int threadId;
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#else
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pid_t pid;
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#endif
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} ParallelSlot;
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#define NO_SLOT (-1)
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typedef struct ParallelState
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{
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int numWorkers;
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ParallelSlot *parallelSlot;
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} ParallelState;
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#ifdef WIN32
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extern bool parallel_init_done;
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extern DWORD mainThreadId;
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#endif
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extern void init_parallel_dump_utils(void);
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extern int GetIdleWorker(ParallelState *pstate);
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extern bool IsEveryWorkerIdle(ParallelState *pstate);
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extern void ListenToWorkers(ArchiveHandle *AH, ParallelState *pstate, bool do_wait);
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extern int ReapWorkerStatus(ParallelState *pstate, int *status);
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extern void EnsureIdleWorker(ArchiveHandle *AH, ParallelState *pstate);
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extern void EnsureWorkersFinished(ArchiveHandle *AH, ParallelState *pstate);
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extern ParallelState *ParallelBackupStart(ArchiveHandle *AH);
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extern void DispatchJobForTocEntry(ArchiveHandle *AH,
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ParallelState *pstate,
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TocEntry *te, T_Action act);
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extern void ParallelBackupEnd(ArchiveHandle *AH, ParallelState *pstate);
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extern void checkAborting(ArchiveHandle *AH);
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#endif /* PG_DUMP_PARALLEL_H */
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