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Declare LWLock pointers as volatile to prevent AIX compiler from

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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;