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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2008-12-09 14:28:20 +0000 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2008-12-09 14:28:20 +0000 |
| commit | 7b05b3fa3996c6b7795c22757a31e2348378209d (patch) | |
| tree | acfe73e103dc5291a7c61d7b90b476c9c1e27a35 /src/backend/commands/async.c | |
| parent | 9edd720050a2979c684b514f7d5118a8a0d45dff (diff) | |
| download | postgresql-7b05b3fa3996c6b7795c22757a31e2348378209d.tar.gz | |
Provide support for multiplexing SIGUSR1 signal. The upcoming synchronous
replication patch needs a signal, but we've already used SIGUSR1 and
SIGUSR2 in normal backends. This patch allows reusing SIGUSR1 for that,
and for other purposes too if the need arises.
Diffstat (limited to 'src/backend/commands/async.c')
| -rw-r--r-- | src/backend/commands/async.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/src/backend/commands/async.c b/src/backend/commands/async.c index 195159f305..0767d97ef9 100644 --- a/src/backend/commands/async.c +++ b/src/backend/commands/async.c @@ -7,7 +7,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/commands/async.c,v 1.142 2008/11/02 01:45:27 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/commands/async.c,v 1.143 2008/12/09 14:28:20 heikki Exp $ * *------------------------------------------------------------------------- */ @@ -915,9 +915,10 @@ EnableNotifyInterrupt(void) * a frontend command. Signal handler execution of inbound notifies * is disabled until the next EnableNotifyInterrupt call. * - * The SIGUSR1 signal handler also needs to call this, so as to - * prevent conflicts if one signal interrupts the other. So we - * must return the previous state of the flag. + * This also needs to be called when SIGUSR1 with + * PROCSIG_CATCHUP_INTERRUPT is received, so as to prevent conflicts + * if one signal interrupts the other. So we must return the previous + * state of the flag. */ bool DisableNotifyInterrupt(void) @@ -954,7 +955,7 @@ ProcessIncomingNotify(void) nulls[Natts_pg_listener]; bool catchup_enabled; - /* Must prevent SIGUSR1 interrupt while I am running */ + /* Must prevent catchup interrupt while I am running */ catchup_enabled = DisableCatchupInterrupt(); if (Trace_notify) |