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/* $Id: vmsegment.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"
/* Get the segment containing this address
**
** Written by Kiem-Phong Vo, kpv@research.att.com, 02/07/95
*/
#if __STD_C
Void_t *vmsegment(Vmalloc_t * vm, Void_t * addr)
#else
Void_t *vmsegment(vm, addr)
Vmalloc_t *vm; /* region */
Void_t *addr; /* address */
#endif
{
reg Seg_t *seg;
reg Vmdata_t *vd = vm->data;
if (!(vd->mode & VM_TRUST)) {
if (ISLOCK(vd, 0))
return NIL(Void_t *);
SETLOCK(vd, 0);
}
for (seg = vd->seg; seg; seg = seg->next)
if ((Vmuchar_t *) addr >= (Vmuchar_t *) seg->addr &&
(Vmuchar_t *) addr < (Vmuchar_t *) seg->baddr)
break;
CLRLOCK(vd, 0);
return seg ? (Void_t *) seg->addr : NIL(Void_t *);
}
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