usr/src/lib/libast/common/vmalloc/vmregion.c

   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
  24 void _STUB_vmregion(){}
  25
  26 #else
  27
  28 #include        "vmhdr.h"
  29
  30 /*      Return the containing region of an allocated piece of memory.
  31 **      Beware: this only works with Vmbest, Vmdebug and Vmprofile.
  32 **
  33 **      10/31/2009: Add handling of shared/persistent memory regions.
  34 **
  35 **      Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
  36 */
  37 #if __STD_C
  38 Vmalloc_t* vmregion(Void_t* addr)
  39 #else
  40 Vmalloc_t* vmregion(addr)
  41 Void_t* addr;
  42 #endif
  43 {
  44         Vmalloc_t       *vm;
  45         Vmdata_t        *vd;
  46
  47         if(!addr)
  48                 return NIL(Vmalloc_t*);
  49
  50         vd = SEG(BLOCK(addr))->vmdt;
  51         for(vm = Vmheap; vm; vm = vm->next)
  52                 if(vm->data == vd)
  53                         break;
  54
  55         return vm;
  56 }
  57
  58 #endif