/*******************************************************************
*                                                                  *
*             This software is part of the ast package             *
*                Copyright (c) 1985-2004 AT&T Corp.                *
*        and it may only be used by you under license from         *
*                       AT&T Corp. ("AT&T")                        *
*         A copy of the Source Code Agreement is available         *
*                at the AT&T Internet web site URL                 *
*                                                                  *
*       http://www.research.att.com/sw/license/ast-open.html       *
*                                                                  *
*    If you have copied or used this software without agreeing     *
*        to the terms of the license you are infringing on         *
*           the license and copyright and are violating            *
*               AT&T's intellectual property rights.               *
*                                                                  *
*            Information and Software Systems Research             *
*                        AT&T Labs Research                        *
*                         Florham Park NJ                          *
*                                                                  *
*               Glenn Fowler <gsf@research.att.com>                *
*                David Korn <dgk@research.att.com>                 *
*                 Phong Vo <kpv@research.att.com>                  *
*                                                                  *
*******************************************************************/
#if defined(_UWIN) && defined(_BLD_ast)

void _STUB_vmset(){}

#else

#include	"vmhdr.h"


/*	Set the control flags for a region.
**
**	Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
*/
#if __STD_C
int vmset(reg Vmalloc_t* vm, int flags, int on)
#else
int vmset(vm, flags, on)
reg Vmalloc_t*	vm;	/* region being worked on		*/
int		flags;	/* flags must be in VM_FLAGS		*/
int		on;	/* !=0 if turning on, else turning off	*/
#endif
{
	reg int		mode;
	reg Vmdata_t*	vd = vm->data;

	if(flags == 0 && on == 0)
		return vd->mode;

	if(!(vd->mode&VM_TRUST) )
	{	if(ISLOCK(vd,0))
			return 0;
		SETLOCK(vd,0);
	}

	mode = vd->mode;

	if(on)
		vd->mode |=  (flags&VM_FLAGS);
	else	vd->mode &= ~(flags&VM_FLAGS);

	if(vd->mode&(VM_TRACE|VM_MTDEBUG))
		vd->mode &= ~VM_TRUST;

	CLRLOCK(vd,0);

	return mode;
}

#endif
