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/****************************************************************
* *
* Copyright (c) 2001-2020 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* 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 "cmidef.h"
#include "hashtab_mname.h" /* needed for cmmdef.h */
#include "cmmdef.h"
#include "gt_timer.h"
#include "gtcmlkdef.h"
#include "gtcml.h"
GBLDEF cm_lckblkreg *blkdlist;
GBLREF gd_region *gv_cur_region;
GBLDEF ABS_TIME chkreg_time;
void gtcml_chkreg(void)
{
cm_lckblkreg *reg, *reg1;
gtm_uint64_t wakeup;
sys_get_curr_time(&chkreg_time); /* just once per pass */
reg1 = reg = blkdlist;
while (reg)
{
gv_cur_region = reg->region->reg;
if (0 == reg->region->refcnt)
{
gtcml_chklck(reg, FALSE);
assert (0 == reg->lock);
} else
{
/* the following avoids repeated dereferencing on the asumption that a slightly stale value (picked up
* outside of LOCK crit) is not a big deal - reconsider on any evidence to the contrary and if so check
* mlk_unpend as well
*/
wakeup = ((mlk_ctldata *)FILE_INFO(gv_cur_region)->s_addrs.mlkctl)->wakeups;
assert(wakeup);
if (reg->region->wakeup < wakeup)
{
gtcml_chklck(reg, FALSE);
reg->pass = CM_BLKPASS;
} else if (0 == --reg->pass)
{
gtcml_chklck(reg, TRUE);
reg->pass = CM_BLKPASS;
}
reg->region->wakeup = wakeup; /* done for both cases above due to possibility of wakeup rollover */
}
if (0 == reg->lock)
{
if (reg == blkdlist)
{
blkdlist = reg->next;
free(reg);
reg = reg1 = blkdlist;
} else
{
reg1->next = reg->next;
free(reg);
reg = reg1->next;
}
} else
{
reg1 = reg;
reg = reg->next;
}
}
}
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