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Use dlist/dclist instead of PROC_QUEUE / SHM_QUEUE for heavyweight locks

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Part of a series to remove SHM_QUEUE. ilist.h style lists are more widely used
and have an easier to use interface.

As PROC_QUEUE is now unused, remove it.

Reviewed-by: Thomas Munro <thomas.munro@gmail.com> (in an older version)
Discussion: https://postgr.es/m/20221120055930.t6kl3tyivzhlrzu2@awork3.anarazel.de
Discussion: https://postgr.es/m/20200211042229.msv23badgqljrdg2@alap3.anarazel.de
This commit is contained in:
Andres Freund
2023-01-18 11:41:14 -08:00
parent 51384cc40c
commit 5764f611e1
7 changed files with 183 additions and 339 deletions
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4
src/backend/access/transam/twophase.c
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@@ -461,7 +461,7 @@ MarkAsPreparingGuts(GlobalTransaction gxact, TransactionId xid, const char *gid,
/* Initialize the PGPROC entry */
MemSet(proc, 0, sizeof(PGPROC));
proc->pgprocno = gxact->pgprocno;
SHMQueueElemInit(&(proc->links));
dlist_node_init(&proc->links);
proc->waitStatus = PROC_WAIT_STATUS_OK;
if (LocalTransactionIdIsValid(MyProc->lxid))
{
@@ -491,7 +491,7 @@ MarkAsPreparingGuts(GlobalTransaction gxact, TransactionId xid, const char *gid,
proc->waitProcLock = NULL;
pg_atomic_init_u64(&proc->waitStart, 0);
for (i = 0; i < NUM_LOCK_PARTITIONS; i++)
SHMQueueInit(&(proc->myProcLocks[i]));
dlist_init(&proc->myProcLocks[i]);
/* subxid data must be filled later by GXactLoadSubxactData */
proc->subxidStatus.overflowed = false;
proc->subxidStatus.count = 0;