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Viewing changes to tools/vmalloc/vmdcheap.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/vmdcheap.c
 
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#include        "vmhdr.h"
 
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/*      A discipline to get memory from the heap.
 
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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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static Void_t* heapmem(Vmalloc_t* vm, Void_t* caddr,
 
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                        size_t csize, size_t nsize,
 
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                        Vmdisc_t* disc)
 
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#else
 
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static Void_t* heapmem(vm, caddr, csize, nsize, disc)
 
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Vmalloc_t*      vm;     /* region doing allocation from         */
 
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Void_t*         caddr;  /* current low address                  */
 
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size_t          csize;  /* current size                         */
 
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size_t          nsize;  /* new size                             */
 
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Vmdisc_t*       disc;   /* discipline structure                 */
 
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#endif
 
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{
 
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        NOTUSED(vm);
 
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        NOTUSED(disc);
 
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        if(csize == 0)
 
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                return vmalloc(Vmheap,nsize);
 
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        else if(nsize == 0)
 
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                return vmfree(Vmheap,caddr) >= 0 ? caddr : NIL(Void_t*);
 
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        else    return vmresize(Vmheap,caddr,nsize,0);
 
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}
 
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static Vmdisc_t _Vmdcheap = { heapmem, NIL(Vmexcept_f), 0 };
 
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__DEFINE__(Vmdisc_t*,Vmdcheap,&_Vmdcheap);