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Restructure backend SIGINT/SIGTERM handling so that 'die' interrupts

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are treated more like 'cancel' interrupts: the signal handler sets a
flag that is examined at well-defined spots, rather than trying to cope
with an interrupt that might happen anywhere.  See pghackers discussion
of 1/12/01.
This commit is contained in:
Tom Lane
2001-01-14 05:08:17 +00:00
parent 027f144e39
commit 36839c1927
24 changed files with 614 additions and 479 deletions
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11
src/backend/utils/init/globals.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/globals.c,v 1.49 2001/01/07 04:17:29 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/globals.c,v 1.50 2001/01/14 05:08:16 tgl Exp $
*
* NOTES
* Globals used all over the place should be declared here and not
@@ -34,7 +34,12 @@ ProtocolVersion FrontendProtocol = PG_PROTOCOL_LATEST;
bool Noversion = false;
bool Quiet = false;
volatile bool QueryCancel = false;
volatile bool InterruptPending = false;
volatile bool QueryCancelPending = false;
volatile bool ProcDiePending = false;
volatile bool ImmediateInterruptOK = false;
volatile uint32 CritSectionCount = 0;
int MyProcPid;
struct Port *MyProcPort;
@@ -56,9 +61,7 @@ BackendId MyBackendId;
char *DatabaseName = NULL;
char *DatabasePath = NULL;
bool MyDatabaseIdIsInitialized = false;
Oid MyDatabaseId = InvalidOid;
bool TransactionInitWasProcessed = false;
bool IsUnderPostmaster = false;