usr/src/lib/libast/common/vmalloc/vmclose.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_vmclose(){}
  25
  26 #else
  27
  28 #include        "vmhdr.h"
  29
  30 /*      Close down a region.
  31 **
  32 **      Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
  33 */
  34 #if __STD_C
  35 int vmclose(Vmalloc_t* vm)
  36 #else
  37 int vmclose(vm)
  38 Vmalloc_t*      vm;
  39 #endif
  40 {
  41         Seg_t           *seg, *vmseg, *next;
  42         Vmalloc_t       *v, *last;
  43         Vmdata_t*       vd = vm->data;
  44         int             ev = 0;
  45
  46         if(vm == Vmheap)
  47                 return -1;
  48
  49         if(!(vd->mode&VM_TRUST) && ISLOCK(vd,0))
  50                 return -1;
  51
  52         if(vm->disc->exceptf &&
  53            (ev = (*vm->disc->exceptf)(vm,VM_CLOSE,NIL(Void_t*),vm->disc)) < 0 )
  54                 return -1;
  55
  56         /* make this region inaccessible until it disappears */
  57         vd->mode &= ~VM_TRUST;
  58         SETLOCK(vd,0);
  59
  60         if((vd->mode&VM_MTPROFILE) && _Vmpfclose)
  61                 (*_Vmpfclose)(vm);
  62
  63         /* remove from linked list of regions   */
  64         for(last = Vmheap, v = last->next; v; last = v, v = v->next)
  65         {       if(v == vm)
  66                 {       last->next = v->next;
  67                         break;
  68                 }
  69         }
  70
  71         if(ev == 0)
  72         {       vmseg = NIL(Seg_t*);
  73                 for(seg = vd->seg; seg; seg = next)
  74                 {       next = seg->next;
  75                         if(seg->extent == seg->size)
  76                                 vmseg = seg;
  77                         else    (*vm->disc->memoryf)(vm,seg->addr,seg->extent,0,vm->disc);
  78                 }
  79                 if(vmseg)
  80                         (*vm->disc->memoryf)(vm,vmseg->addr,vmseg->extent,0,vm->disc);
  81         }
  82         else    CLRLOCK(vd,0);
  83
  84         vmfree(Vmheap,vm);
  85
  86         return 0;
  87 }
  88
  89 #endif