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| author | Tom Lane <tgl@sss.pgh.pa.us> | 1998-10-06 02:40:09 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 1998-10-06 02:40:09 +0000 |
| commit | c77a29a14efe69851a087989e3520ed560fa8862 (patch) | |
| tree | 351498a12d481c6ab7c52632441b2294a708f504 /src/include/commands/async.h | |
| parent | e7e027a6c9ca2fde9c05da9fda8ea89d1a6296c6 (diff) | |
| download | postgresql-c77a29a14efe69851a087989e3520ed560fa8862.tar.gz | |
Substantial rewrite of async.c to avoid problems with non-reentrant stdio
and possibly other problems. Minor changes in xact.c and postgres.c's
main loop to support new handling of async NOTIFY.
Diffstat (limited to 'src/include/commands/async.h')
| -rw-r--r-- | src/include/commands/async.h | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/src/include/commands/async.h b/src/include/commands/async.h index 2c9d0a348a..5494b0f6c7 100644 --- a/src/include/commands/async.h +++ b/src/include/commands/async.h @@ -1,27 +1,38 @@ /*------------------------------------------------------------------------- * * async.h-- - * - * + * Asynchronous notification: NOTIFY, LISTEN, UNLISTEN * * Copyright (c) 1994, Regents of the University of California * - * $Id: async.h,v 1.9 1998/09/01 04:35:22 momjian Exp $ + * $Id: async.h,v 1.10 1998/10/06 02:40:08 tgl Exp $ * *------------------------------------------------------------------------- */ #ifndef ASYNC_H #define ASYNC_H -#include <nodes/memnodes.h> +#include <postgres.h> -extern void Async_NotifyHandler(SIGNAL_ARGS); +/* notify-related SQL statements */ extern void Async_Notify(char *relname); -extern void Async_NotifyAtCommit(void); -extern void Async_NotifyAtAbort(void); extern void Async_Listen(char *relname, int pid); extern void Async_Unlisten(char *relname, int pid); -extern GlobalMemory notifyContext; +/* perform (or cancel) outbound notify processing at transaction commit */ +extern void AtCommit_Notify(void); +extern void AtAbort_Notify(void); + +/* signal handler for inbound notifies (SIGUSR2) */ +extern void Async_NotifyHandler(SIGNAL_ARGS); + +/* + * enable/disable processing of inbound notifies directly from signal handler. + * The enable routine first performs processing of any inbound notifies that + * have occurred since the last disable. These are meant to be called ONLY + * from the appropriate places in PostgresMain(). + */ +extern void EnableNotifyInterrupt(void); +extern void DisableNotifyInterrupt(void); #endif /* ASYNC_H */ |