xref: /titanic_51/usr/src/lib/libast/common/vmalloc/vmregion.c (revision 3e14f97f673e8a630f076077de35afdd43dc1587)

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T 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_vmregion(){}

#else

#include	"vmhdr.h"

/*	Return the containing region of an allocated piece of memory.
**	Beware: this only works with Vmbest, Vmdebug and Vmprofile.
**
**	10/31/2009: Add handling of shared/persistent memory regions.
**
**	Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
*/
#if __STD_C
Vmalloc_t* vmregion(Void_t* addr)
#else
Vmalloc_t* vmregion(addr)
Void_t*	addr;
#endif
{
	Vmalloc_t	*vm;
	Vmdata_t	*vd;

	if(!addr)
		return NIL(Vmalloc_t*);

	vd = SEG(BLOCK(addr))->vmdt;
	for(vm = Vmheap; vm; vm = vm->next)
		if(vm->data == vd)
			break;

	return vm;
}

#endif