40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* async.h
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* Asynchronous notification: NOTIFY, LISTEN, UNLISTEN
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: async.h,v 1.15 2000/08/27 19:00:41 petere Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef ASYNC_H
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#define ASYNC_H
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extern bool Trace_notify;
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/* notify-related SQL statements */
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extern void Async_Notify(char *relname);
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extern void Async_Listen(char *relname, int pid);
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extern void Async_Unlisten(char *relname, int pid);
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/* perform (or cancel) outbound notify processing at transaction commit */
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extern void AtCommit_Notify(void);
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extern void AtAbort_Notify(void);
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/* signal handler for inbound notifies (SIGUSR2) */
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extern void Async_NotifyHandler(int signum);
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/*
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* enable/disable processing of inbound notifies directly from signal handler.
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* The enable routine first performs processing of any inbound notifies that
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* have occurred since the last disable. These are meant to be called ONLY
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* from the appropriate places in PostgresMain().
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*/
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extern void EnableNotifyInterrupt(void);
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extern void DisableNotifyInterrupt(void);
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#endif /* ASYNC_H */
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