1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 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
24void _STUB_vmset(){}
25
26#else
27
28#include	"vmhdr.h"
29
30
31/*	Set the control flags for a region.
32**
33**	Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
34*/
35#if __STD_C
36int vmset(reg Vmalloc_t* vm, int flags, int on)
37#else
38int vmset(vm, flags, on)
39reg Vmalloc_t*	vm;	/* region being worked on		*/
40int		flags;	/* flags must be in VM_FLAGS		*/
41int		on;	/* !=0 if turning on, else turning off	*/
42#endif
43{
44	reg int		mode, inuse;
45	reg Vmdata_t*	vd = vm->data;
46
47	if(flags == 0 && on == 0)
48		return vd->mode;
49
50	SETINUSE(vd, inuse);
51	if(!(vd->mode&VM_TRUST) )
52	{	if(ISLOCK(vd,0))
53		{	CLRINUSE(vd, inuse);
54			return 0;
55		}
56		SETLOCK(vd,0);
57	}
58
59	mode = vd->mode;
60
61	if(on)
62		vd->mode |=  (flags&VM_FLAGS);
63	else	vd->mode &= ~(flags&VM_FLAGS);
64
65	if(vd->mode&(VM_TRACE|VM_MTDEBUG))
66		vd->mode &= ~VM_TRUST;
67
68	CLRLOCK(vd,0);
69	CLRINUSE(vd, inuse);
70
71	return mode;
72}
73
74#endif
75