1 /*-------------------------------------------------------------------------
4 * routines for signaling the postmaster from its child processes
7 * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
10 * $PostgreSQL: pgsql/src/include/storage/pmsignal.h,v 1.13 2005/08/12 03:24:43 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_auth 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 */
28 PMSIGNAL_ROTATE_LOGFILE, /* send SIGUSR1 to syslogger to rotate logfile */
30 NUM_PMSIGNALS /* Must be last value of enum! */
34 * prototypes for functions in pmsignal.c
36 extern void PMSignalInit(void);
37 extern void SendPostmasterSignal(PMSignalReason reason);
38 extern bool CheckPostmasterSignal(PMSignalReason reason);
39 extern bool PostmasterIsAlive(bool amDirectChild);
41 #endif /* PMSIGNAL_H */