1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2010 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Common Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.opensource.org/licenses/cpl1.0.txt *
11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
12 * *
13 * Information and Software Systems Research *
14 * AT&T Research *
15 * Florham Park NJ *
16 * *
17 * Glenn Fowler <gsf@research.att.com> *
18 * David Korn <dgk@research.att.com> *
19 * Phong Vo <kpv@research.att.com> *
20 * *
21 ***********************************************************************/
22 #if defined(_UWIN) && defined(_BLD_ast)
23
_STUB_vmsegment()24 void _STUB_vmsegment(){}
25
26 #else
27
28 #include "vmhdr.h"
29
30 /* Get the segment containing this address
31 **
32 ** Written by Kiem-Phong Vo, kpv@research.att.com, 02/07/95
33 */
34
35 #if __STD_C
vmsegment(Vmalloc_t * vm,Void_t * addr)36 Void_t* vmsegment(Vmalloc_t* vm, Void_t* addr)
37 #else
38 Void_t* vmsegment(vm, addr)
39 Vmalloc_t* vm; /* region */
40 Void_t* addr; /* address */
41 #endif
42 {
43 reg Seg_t* seg;
44 reg Vmdata_t* vd = vm->data;
45 reg int inuse;
46
47 SETINUSE(vd, inuse);
48 if(!(vd->mode&VM_TRUST))
49 { if(ISLOCK(vd,0))
50 { CLRINUSE(vd, inuse);
51 return NIL(Void_t*);
52 }
53 SETLOCK(vd,0);
54 }
55
56 for(seg = vd->seg; seg; seg = seg->next)
57 if((Vmuchar_t*)addr >= (Vmuchar_t*)seg->addr &&
58 (Vmuchar_t*)addr < (Vmuchar_t*)seg->baddr )
59 break;
60
61 CLRLOCK(vd,0);
62 CLRINUSE(vd, inuse);
63 return seg ? (Void_t*)seg->addr : NIL(Void_t*);
64 }
65
66 #endif
67