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/*-------------------------------------------------------------------------
*
* pmsignal.h
* routines for signaling the postmaster from its child processes
*
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/pmsignal.h,v 1.8 2004/05/29 22:48:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PMSIGNAL_H
#define PMSIGNAL_H
/*
* Reasons for signaling the postmaster. We can cope with simultaneous
* signals for different reasons. If the same reason is signaled multiple
* times in quick succession, however, the postmaster is likely to observe
* only one notification of it. This is okay for the present uses.
*/
typedef enum
{
PMSIGNAL_PASSWORD_CHANGE, /* pg_pwd file has changed */
PMSIGNAL_WAKEN_CHILDREN, /* send a SIGUSR1 signal to all backends */
NUM_PMSIGNALS /* Must be last value of enum! */
} PMSignalReason;
/*
* prototypes for functions in pmsignal.c
*/
extern void PMSignalInit(void);
extern void SendPostmasterSignal(PMSignalReason reason);
extern bool CheckPostmasterSignal(PMSignalReason reason);
extern bool PostmasterIsAlive(bool amDirectChild);
#endif /* PMSIGNAL_H */
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