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Fix a variety of locking problems like newer lock waiters getting

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lock before older waiters, and having readlock people not share
locks if a writer is waiting for a lock, and waiting writers not
getting priority over waiting readers.
This commit is contained in:
Bruce Momjian
1998-01-23 22:16:48 +00:00
parent 1de8926bbe
commit 0e8ac82c63
2 changed files with 18 additions and 4 deletions
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6
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 1.26 1998/01/23 06:01:05 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.27 1998/01/23 22:16:48 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 1.26 1998/01/23 06:01:05 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/proc.c,v 1.27 1998/01/23 22:16:48 momjian Exp $
*/
#include <sys/time.h>
#include <unistd.h>
@@ -469,7 +469,7 @@ ProcSleep(PROC_QUEUE *queue,
proc = (PROC *) MAKE_PTR(queue->links.prev);
for (i = 0; i < queue->size; i++)
{
if (proc->prio < prio)
if (proc->prio >= prio)
proc = (PROC *) MAKE_PTR(proc->links.prev);
else
break;