Disable query cancel during HandleDeadLock().

diff --git a/src/backend/storage/lmgr/proc.c b/src/backend/storage/lmgr/proc.c
index 406aa35f7c6dc42634c1347b7e73f08ff8c7496a..2730c8811e6e91a19bd215c8ebf522c58c2e66c5 100644 (file)
--- a/src/backend/storage/lmgr/proc.c
+++ b/src/backend/storage/lmgr/proc.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.89 2000/12/22 00:51:54 tgl Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.90 2001/01/09 09:38:57 inoue Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -48,7 +48,7 @@
  *             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 1.89 2000/12/22 00:51:54 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.90 2001/01/09 09:38:57 inoue Exp $
  */
 #include "postgres.h"
 
@@ -864,7 +864,9 @@ HandleDeadLock(SIGNAL_ARGS)
 {
        int                     save_errno = errno;
        LOCK       *mywaitlock;
+       bool    isWaitingForLock = lockWaiting; /* save waiting status */
 
+       SetWaitingForLock(false); /* disable query cancel during this fuction */
        LockLockTable();
 
        /* ---------------------
@@ -884,6 +886,7 @@ HandleDeadLock(SIGNAL_ARGS)
        {
                UnlockLockTable();
                errno = save_errno;
+               SetWaitingForLock(isWaitingForLock); /* restore waiting status */
                return;
        }
 
@@ -897,6 +900,7 @@ HandleDeadLock(SIGNAL_ARGS)
                /* No deadlock, so keep waiting */
                UnlockLockTable();
                errno = save_errno;
+               SetWaitingForLock(isWaitingForLock); /* restore waiting status */
                return;
        }
 
@@ -911,7 +915,7 @@ HandleDeadLock(SIGNAL_ARGS)
        SHMQueueElemInit(&(MyProc->links));
        MyProc->waitLock = NULL;
        MyProc->waitHolder = NULL;
-       lockWaiting = false;
+       isWaitingForLock = false; /* wait for lock no longer */
 
        /* ------------------
         * Unlock my semaphore so that the interrupted ProcSleep() call can finish.