62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
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/****************************************************************
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* *
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* Copyright 2001 Sanchez Computer Associates, Inc. *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "mlkdef.h"
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#include "locklits.h"
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#include "mlk_bckout.h"
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#include "mlk_unlock.h"
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#include "mlk_unpend.h"
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void mlk_bckout(mlk_pvtblk *p,unsigned char action)
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{
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if (!p->granted)
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{
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mlk_unpend(p);
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}
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else
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{
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switch(action)
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{
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case INCREMENTAL:
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if ((p->level -= p->translev) <= 0 && !p->zalloc)
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{ mlk_unlock(p);
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p->granted = FALSE;
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p->level = 0;
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p->nodptr = 0;
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}
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break;
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case ZALLOCATED:
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if (!p->level && !(p->old))
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{ mlk_unlock(p);
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p->granted = FALSE;
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p->zalloc = FALSE;
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p->nodptr = 0;
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}
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else if (!p->old)
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p->zalloc = FALSE;
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break;
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case LOCKED:
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if (!p->zalloc)
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{ mlk_unlock(p);
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p->granted = FALSE;
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p->level = 0;
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p->nodptr = 0;
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}
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else
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p->level = 0;
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break;
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default:
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GTMASSERT;
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}
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}
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}
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