69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2009 Fidelity Information Services, 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 "gtm_string.h"
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#include "mlkdef.h"
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#include "copy.h"
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#include "mlk_shrblk_delete_if_empty.h"
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bool mlk_shrblk_delete_if_empty(mlk_ctldata_ptr_t ctl,
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mlk_shrblk_ptr_t d)
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{
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mlk_shrblk_ptr_t r, l, p;
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mlk_shrsub_ptr_t sub;
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if (d->children != 0 || d->owner != 0 || d->pending != 0)
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return FALSE;
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if (d->parent == 0)
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p = NULL;
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else
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p = (mlk_shrblk_ptr_t)R2A(d->parent);
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l = (mlk_shrblk_ptr_t)R2A(d->lsib);
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r = (mlk_shrblk_ptr_t)R2A(d->rsib);
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if (d == r)
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if (p == NULL)
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ctl->blkroot = 0;
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else
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p->children = 0;
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else
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{
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assert(d != l);
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A2R(r->lsib, l);
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A2R(l->rsib, r);
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if (p != NULL && (mlk_shrblk_ptr_t)R2A(p->children) == d)
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A2R(p->children, r);
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else
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if ((mlk_shrblk_ptr_t)R2A(ctl->blkroot) == d)
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A2R(ctl->blkroot, r);
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}
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sub = (mlk_shrsub_ptr_t)R2A(d->value);
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PUT_ZERO(sub->backpointer);
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p = (mlk_shrblk_ptr_t)R2A(ctl->blkfree);
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memset(d, 0, SIZEOF(mlk_shrblk));
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A2R(d->rsib, p);
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A2R(ctl->blkfree, d);
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++ctl->blkcnt;
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return TRUE;
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}
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