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Viewing changes to tools/vmalloc/vmclose.c

  • Committer: Bazaar Package Importer
  • Author(s): Stephen M Moraco
  • Date: 2002-02-05 18:52:12 UTC
  • Revision ID: james.westby@ubuntu.com-20020205185212-8i04c70te00rc40y
Tags: upstream-1.7.16
Import upstream version 1.7.16

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tools/vmalloc/vmclose.c
 
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#include        "vmhdr.h"
 
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/*      Close down a region.
 
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**
 
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**      Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
 
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*/
 
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#if __STD_C
 
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int vmclose(Vmalloc_t* vm)
 
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#else
 
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int vmclose(vm)
 
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Vmalloc_t*      vm;
 
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#endif
 
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{
 
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        reg Seg_t       *seg, *vmseg;
 
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        reg Vmemory_f   memoryf;
 
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        reg Vmdata_t*   vd = vm->data;
 
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        reg Vmalloc_t   *v, *last;
 
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        if(vm == Vmheap)
 
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                return -1;
 
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        if(!(vd->mode&VM_TRUST) && ISLOCK(vd,0))
 
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                return -1;
 
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        if(vm->disc->exceptf &&
 
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           (*vm->disc->exceptf)(vm,VM_CLOSE,NIL(Void_t*),vm->disc) < 0)
 
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                return -1;
 
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        /* make this region inaccessible until it disappears */
 
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        vd->mode &= ~VM_TRUST;
 
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        SETLOCK(vd,0);
 
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        if((vd->mode&VM_MTPROFILE) && _Vmpfclose)
 
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                (*_Vmpfclose)(vm);
 
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        /* remove from linked list of regions   */
 
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        for(last = Vmheap, v = last->next; v; last = v, v = v->next)
 
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        {       if(v == vm)
 
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                {       last->next = v->next;
 
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                        break;
 
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                }
 
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        }
 
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        /* free all non-region segments */
 
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        memoryf = vm->disc->memoryf;
 
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        vmseg = NIL(Seg_t*);
 
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        for(seg = vd->seg; seg; )
 
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        {       reg Seg_t*      next = seg->next;
 
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                if(seg->extent != seg->size)
 
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                        (void)(*memoryf)(vm,seg->addr,seg->extent,0,vm->disc);
 
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                else    vmseg = seg;
 
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                seg = next;
 
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        }
 
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        /* this must be done here because even though this region is freed,
 
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           there may still be others that share this space.
 
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        */
 
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        CLRLOCK(vd,0);
 
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        /* free the segment that contains the region data */
 
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        if(vmseg)
 
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                (void)(*memoryf)(vm,vmseg->addr,vmseg->extent,0,vm->disc);
 
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        /* free the region itself */
 
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        vmfree(Vmheap,vm);
 
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        return 0;
 
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}