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Declare LWLock pointers as volatile to prevent AIX compiler from 

reordering operations at its whim.  Releasing TAS lock before we've
finished updating proc structure is uncool.
This commit is contained in:
Tom Lane 2001-12-10 21:13:50 +00:00
parent 53016fa55c
commit 584f818bef
1 changed files with 4 additions and 4 deletions
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8
src/backend/storage/lmgr/lwlock.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lwlock.c,v 1.3 2001/11/05 17:46:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lwlock.c,v 1.4 2001/12/10 21:13:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -185,7 +185,7 @@ LWLockAssign(void)
void
LWLockAcquire(LWLockId lockid, LWLockMode mode)
{
LWLock *lock = LWLockArray + lockid;
volatile LWLock *lock = LWLockArray + lockid;
bool mustwait;
PRINT_LWDEBUG("LWLockAcquire", lockid, lock);
@ -303,7 +303,7 @@ LWLockAcquire(LWLockId lockid, LWLockMode mode)
bool
LWLockConditionalAcquire(LWLockId lockid, LWLockMode mode)
{
LWLock *lock = LWLockArray + lockid;
volatile LWLock *lock = LWLockArray + lockid;
bool mustwait;
PRINT_LWDEBUG("LWLockConditionalAcquire", lockid, lock);
@ -369,7 +369,7 @@ LWLockConditionalAcquire(LWLockId lockid, LWLockMode mode)
void
LWLockRelease(LWLockId lockid)
{
LWLock *lock = LWLockArray + lockid;
volatile LWLock *lock = LWLockArray + lockid;
PROC *head;
PROC *proc;
int i;