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/****************************************************************
* *
* Copyright 2001 Sanchez Computer Associates, 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 "mlkdef.h"
#include "locklits.h"
#include "mlk_bckout.h"
#include "mlk_unlock.h"
#include "mlk_unpend.h"
void mlk_bckout(mlk_pvtblk *p,unsigned char action)
{
if (!p->granted)
{
mlk_unpend(p);
}
else
{
switch(action)
{
case INCREMENTAL:
if ((p->level -= p->translev) <= 0 && !p->zalloc)
{ mlk_unlock(p);
p->granted = FALSE;
p->level = 0;
p->nodptr = 0;
}
break;
case ZALLOCATED:
if (!p->level && !(p->old))
{ mlk_unlock(p);
p->granted = FALSE;
p->zalloc = FALSE;
p->nodptr = 0;
}
else if (!p->old)
p->zalloc = FALSE;
break;
case LOCKED:
if (!p->zalloc)
{ mlk_unlock(p);
p->granted = FALSE;
p->level = 0;
p->nodptr = 0;
}
else
p->level = 0;
break;
default:
GTMASSERT;
}
}
}
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