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/* $Id: vmdisc.c,v 1.3 2009/06/03 01:10:55 ellson Exp $ $Revision: 1.3 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#include "vmhdr.h"
/* Change the discipline for a region. The old discipline
** is returned. If the new discipline is NIL then the
** discipline is not changed.
**
** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
*/
#if __STD_C
Vmdisc_t *vmdisc(Vmalloc_t * vm, Vmdisc_t * disc)
#else
Vmdisc_t *vmdisc(vm, disc)
Vmalloc_t *vm;
Vmdisc_t *disc;
#endif
{
Vmdisc_t *old = vm->disc;
if (disc) {
if (disc->memoryf != old->memoryf)
return NIL(Vmdisc_t *);
if (old->exceptf &&
(*old->exceptf) (vm, VM_DISC, (Void_t *) disc, old) != 0)
return NIL(Vmdisc_t *);
vm->disc = disc;
}
return old;
}
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