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/*------------------------------------------------------------------------- * * async.h * Asynchronous notification: NOTIFY, LISTEN, UNLISTEN * * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * $PostgreSQL: pgsql/src/include/commands/async.h,v 1.36 2008/01/01 19:45:57 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 */