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Fix for deadlock timer timeout.

This commit is contained in:
Bruce Momjian 1998-12-29 18:29:18 +00:00
parent 550de5db2c
commit f659ec545f
1 changed files with 9 additions and 15 deletions
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24
src/backend/storage/lmgr/proc.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.44 1998/12/18 19:45:37 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.45 1998/12/29 18:29:18 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -46,7 +46,7 @@
* This is so that we can support more backends. (system-wide semaphore
* sets run out pretty fast.) -ay 4/95
*
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.44 1998/12/18 19:45:37 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.45 1998/12/29 18:29:18 momjian Exp $
*/
#include <sys/time.h>
#include <unistd.h>
@ -449,7 +449,6 @@ ProcSleep(PROC_QUEUE *waitQueue,/* lock->waitProcs */
int i;
bool deadlock_checked = false;
PROC *proc;
struct timeval timeval;
/*
* If the first entries in the waitQueue have a greater priority than
@ -513,29 +512,24 @@ ProcSleep(PROC_QUEUE *waitQueue,/* lock->waitProcs */
SpinRelease(spinlock);
/* --------------
* We set this so we can wake up periodically and check for a deadlock.
* We set this so we can wake up after one second to check for a deadlock.
* If a deadlock is detected, the handler releases the processes
* semaphore and aborts the current transaction.
*
* Need to zero out struct to set the interval and the micro seconds fields
* to 0.
* --------------
*/
MemSet(&timeval, 0, sizeof(struct timeval));
timeval.tv_sec = \
(DeadlockCheckTimer ? DeadlockCheckTimer : DEADLOCK_CHECK_TIMER);
do
{
int expire;
int expired;
MyProc->errType = NO_ERROR; /* reset flag after deadlock check */
if ((expire = select(0, NULL, NULL, NULL,
(deadlock_checked == false) ? &timeval : NULL)) == -1)
elog(FATAL, "ProcSleep: Unable to set timer for process wakeup");
if (deadlock_checked == false)
expired = sleep(DeadlockCheckTimer ? DeadlockCheckTimer : DEADLOCK_CHECK_TIMER);
else
pause();
if (expire == 0 /* timeout reached */ && deadlock_checked == false)
if (expired == 0 && deadlock_checked == false)
{
HandleDeadLock();
deadlock_checked = true;