1 /*-------------------------------------------------------------------------
4 * routines for signaling the postmaster from its child processes
7 * Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
10 * $PostgreSQL: pgsql/src/include/storage/pmsignal.h,v 1.10 2004/08/29 04:13:10 momjian Exp $
12 *-------------------------------------------------------------------------
18 * Reasons for signaling the postmaster. We can cope with simultaneous
19 * signals for different reasons. If the same reason is signaled multiple
20 * times in quick succession, however, the postmaster is likely to observe
21 * only one notification of it. This is okay for the present uses.
25 PMSIGNAL_PASSWORD_CHANGE, /* pg_pwd file has changed */
26 PMSIGNAL_WAKEN_CHILDREN, /* send a SIGUSR1 signal to all backends */
27 PMSIGNAL_WAKEN_ARCHIVER, /* send a NOTIFY signal to xlog archiver */
29 NUM_PMSIGNALS /* Must be last value of enum! */
33 * prototypes for functions in pmsignal.c
35 extern void PMSignalInit(void);
36 extern void SendPostmasterSignal(PMSignalReason reason);
37 extern bool CheckPostmasterSignal(PMSignalReason reason);
38 extern bool PostmasterIsAlive(bool amDirectChild);
40 #endif /* PMSIGNAL_H */