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Viewing changes to src/include/storage/pmsignal.h

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2009-03-20 12:00:13 UTC
  • Revision ID: james.westby@ubuntu.com-20090320120013-hogj7egc5mjncc5g
Tags: upstream-8.4~0cvs20090328
Import upstream version 8.4~0cvs20090328

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src/include/storage/pmsignal.h
 
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/*-------------------------------------------------------------------------
 
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 *
 
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 * pmsignal.h
 
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 *        routines for signaling the postmaster from its child processes
 
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 *
 
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 *
 
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 * Portions Copyright (c) 1996-2009, 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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 * $PostgreSQL$
 
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 *
 
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 *-------------------------------------------------------------------------
 
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 */
 
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#ifndef PMSIGNAL_H
 
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#define PMSIGNAL_H
 
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/*
 
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 * Reasons for signaling the postmaster.  We can cope with simultaneous
 
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 * signals for different reasons.  If the same reason is signaled multiple
 
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 * times in quick succession, however, the postmaster is likely to observe
 
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 * only one notification of it.  This is okay for the present uses.
 
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 */
 
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typedef enum
 
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{
 
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        PMSIGNAL_RECOVERY_STARTED,      /* recovery has started */
 
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        PMSIGNAL_RECOVERY_CONSISTENT, /* recovery has reached consistent state */
 
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        PMSIGNAL_PASSWORD_CHANGE,       /* pg_auth file has changed */
 
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        PMSIGNAL_WAKEN_ARCHIVER,        /* send a NOTIFY signal to xlog archiver */
 
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        PMSIGNAL_ROTATE_LOGFILE,        /* send SIGUSR1 to syslogger to rotate logfile */
 
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        PMSIGNAL_START_AUTOVAC_LAUNCHER,        /* start an autovacuum launcher */
 
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        PMSIGNAL_START_AUTOVAC_WORKER,          /* start an autovacuum worker */
 
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        NUM_PMSIGNALS                           /* Must be last value of enum! */
 
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} PMSignalReason;
 
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/*
 
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 * prototypes for functions in pmsignal.c
 
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 */
 
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extern void PMSignalInit(void);
 
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extern void SendPostmasterSignal(PMSignalReason reason);
 
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extern bool CheckPostmasterSignal(PMSignalReason reason);
 
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extern bool PostmasterIsAlive(bool amDirectChild);
 
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#endif   /* PMSIGNAL_H */