fis-gtm/sr_port/mlk_prcblk_add.c

77 lines
2.2 KiB
C

/****************************************************************
* *
* Copyright 2001, 2012 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "filestruct.h"
#include "mlkdef.h"
#include "mlk_prcblk_add.h"
#include "mlk_shrclean.h"
error_def(ERR_LOCKSPACEFULL);
error_def(ERR_LOCKSPACEINFO);
void mlk_prcblk_add(gd_region *reg,
mlk_ctldata_ptr_t ctl,
mlk_shrblk_ptr_t d,
uint4 pid)
{
mlk_prcblk_ptr_t pr;
ptroff_t *prpt;
int lcnt;
for (prpt = (ptroff_t *)&d->pending, lcnt = ctl->max_prccnt; *prpt && lcnt; prpt = (ptroff_t *) &pr->next, lcnt--)
{
pr = (mlk_prcblk_ptr_t)R2A(*prpt);
if (pr->process_id == pid)
{
pr->ref_cnt++;
return;
}
}
if (1 > ctl->prccnt)
{ /* No process slot available. */
mlk_shrclean(reg, ctl, (mlk_shrblk_ptr_t)R2A(ctl->blkroot));
if (1 > ctl->prccnt)
{ /* Process cleanup did not help. Issue error to syslog. */
send_msg(VARLSTCNT(4) ERR_LOCKSPACEFULL, 2, DB_LEN_STR(reg));
if (ctl->subtop > ctl->subfree)
send_msg(VARLSTCNT(10) ERR_LOCKSPACEINFO, 8, REG_LEN_STR(reg),
(ctl->max_prccnt - ctl->prccnt), ctl->max_prccnt,
(ctl->max_blkcnt - ctl->blkcnt), ctl->max_blkcnt, LEN_AND_LIT(" not "));
else
send_msg(VARLSTCNT(10) ERR_LOCKSPACEINFO, 8, REG_LEN_STR(reg),
(ctl->max_prccnt - ctl->prccnt), ctl->max_prccnt,
(ctl->max_blkcnt - ctl->blkcnt), ctl->max_blkcnt, LEN_AND_LIT(" "));
return;
}
}
/* Process slot is available. Add process to the queue. */
ctl->prccnt--;
pr = (mlk_prcblk_ptr_t)R2A(ctl->prcfree);
if (0 == pr->next)
{
assert(0 == ctl->prccnt);
ctl->prcfree = 0;
} else
A2R(ctl->prcfree, R2A(pr->next));
A2R(*prpt, pr);
pr->process_id = pid;
pr->ref_cnt = 1;
pr->next = pr->unlock = 0;
return;
}