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Viewing changes to tools/vmalloc/vmclear.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/vmclear.c
 
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#include        "vmhdr.h"
 
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/*      Clear out all allocated space.
 
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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 vmclear(Vmalloc_t* vm)
 
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#else
 
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int vmclear(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;
 
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        reg Seg_t*      next;
 
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        reg Block_t*    tp;
 
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        reg size_t      size, s;
 
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        reg Vmdata_t*   vd = vm->data;
 
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        if(!(vd->mode&VM_TRUST) )
 
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        {       if(ISLOCK(vd,0))
 
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                        return -1;
 
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                SETLOCK(vd,0);
 
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        }
 
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        vd->free = vd->wild = NIL(Block_t*);
 
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        vd->pool = 0;
 
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        if(vd->mode&(VM_MTBEST|VM_MTDEBUG|VM_MTPROFILE) )
 
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        {       vd->root = NIL(Block_t*);
 
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                for(s = 0; s < S_TINY; ++s)
 
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                        TINY(vd)[s] = NIL(Block_t*);
 
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                for(s = 0; s <= S_CACHE; ++s)
 
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                        CACHE(vd)[s] = NIL(Block_t*);
 
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        }
 
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        for(seg = vd->seg; seg; seg = next)
 
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        {       next = seg->next;
 
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                tp = SEGBLOCK(seg);
 
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                size = seg->baddr - ((Vmuchar_t*)tp) - 2*sizeof(Head_t);
 
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                SEG(tp) = seg;
 
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                SIZE(tp) = size;
 
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                if((vd->mode&(VM_MTLAST|VM_MTPOOL)) )
 
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                        seg->free = tp;
 
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                else
 
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                {       SIZE(tp) |= BUSY|JUNK;
 
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                        LINK(tp) = CACHE(vd)[C_INDEX(SIZE(tp))];
 
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                        CACHE(vd)[C_INDEX(SIZE(tp))] = tp;
 
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                }
 
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                tp = BLOCK(seg->baddr);
 
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                SEG(tp) = seg;
 
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                SIZE(tp) = BUSY;
 
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        }
 
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        CLRLOCK(vd,0);
 
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        return 0;
 
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}