| /*------------------------------------------------------------------------- |
| * |
| * async.h |
| * Asynchronous notification: NOTIFY, LISTEN, UNLISTEN |
| * |
| * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group |
| * Portions Copyright (c) 1994, Regents of the University of California |
| * |
| * $PostgreSQL: pgsql/src/include/commands/async.h,v 1.37 2009/01/01 17:23:58 momjian Exp $ |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef ASYNC_H |
| #define ASYNC_H |
| |
| extern bool Trace_notify; |
| |
| /* notify-related SQL statements */ |
| extern void Async_Notify(const char *relname); |
| extern void Async_Listen(const char *relname); |
| extern void Async_Unlisten(const char *relname); |
| extern void Async_UnlistenAll(void); |
| |
| /* perform (or cancel) outbound notify processing at transaction commit */ |
| extern void AtCommit_Notify(void); |
| extern void AtAbort_Notify(void); |
| extern void AtSubStart_Notify(void); |
| extern void AtSubCommit_Notify(void); |
| extern void AtSubAbort_Notify(void); |
| extern void AtPrepare_Notify(void); |
| |
| /* signal handler for inbound notifies (SIGUSR2) */ |
| extern void NotifyInterruptHandler(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. |
| */ |
| extern void EnableNotifyInterrupt(void); |
| extern bool DisableNotifyInterrupt(void); |
| |
| extern void notify_twophase_postcommit(TransactionId xid, uint16 info, |
| void *recdata, uint32 len); |
| |
| #endif /* ASYNC_H */ |