1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin * *
3da2e3ebdSchin * This software is part of the ast package *
4*b30d1939SAndy Fiddaman * Copyright (c) 1985-2011 AT&T Intellectual Property *
5da2e3ebdSchin * and is licensed under the *
6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 *
77c2fbfb3SApril Chin * by AT&T Intellectual Property *
8da2e3ebdSchin * *
9da2e3ebdSchin * A copy of the License is available at *
10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html *
11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12da2e3ebdSchin * *
13da2e3ebdSchin * Information and Software Systems Research *
14da2e3ebdSchin * AT&T Research *
15da2e3ebdSchin * Florham Park NJ *
16da2e3ebdSchin * *
17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> *
18da2e3ebdSchin * David Korn <dgk@research.att.com> *
19da2e3ebdSchin * Phong Vo <kpv@research.att.com> *
20da2e3ebdSchin * *
21da2e3ebdSchin ***********************************************************************/
22da2e3ebdSchin #if defined(_UWIN) && defined(_BLD_ast)
23da2e3ebdSchin
_STUB_vmdcheap()24da2e3ebdSchin void _STUB_vmdcheap(){}
25da2e3ebdSchin
26da2e3ebdSchin #else
27da2e3ebdSchin
28da2e3ebdSchin #include "vmhdr.h"
29da2e3ebdSchin
30da2e3ebdSchin /* A discipline to get memory from the heap.
31da2e3ebdSchin **
32da2e3ebdSchin ** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
33da2e3ebdSchin */
34da2e3ebdSchin #if __STD_C
heapmem(Vmalloc_t * vm,Void_t * caddr,size_t csize,size_t nsize,Vmdisc_t * disc)35da2e3ebdSchin static Void_t* heapmem(Vmalloc_t* vm, Void_t* caddr,
36da2e3ebdSchin size_t csize, size_t nsize,
37da2e3ebdSchin Vmdisc_t* disc)
38da2e3ebdSchin #else
39da2e3ebdSchin static Void_t* heapmem(vm, caddr, csize, nsize, disc)
40da2e3ebdSchin Vmalloc_t* vm; /* region doing allocation from */
41da2e3ebdSchin Void_t* caddr; /* current low address */
42da2e3ebdSchin size_t csize; /* current size */
43da2e3ebdSchin size_t nsize; /* new size */
44da2e3ebdSchin Vmdisc_t* disc; /* discipline structure */
45da2e3ebdSchin #endif
46da2e3ebdSchin {
47*b30d1939SAndy Fiddaman if(csize == 0 && nsize == 0)
48*b30d1939SAndy Fiddaman return NIL(Void_t*);
49*b30d1939SAndy Fiddaman else if(csize == 0)
50da2e3ebdSchin return vmalloc(Vmheap,nsize);
51da2e3ebdSchin else if(nsize == 0)
52da2e3ebdSchin return vmfree(Vmheap,caddr) >= 0 ? caddr : NIL(Void_t*);
53da2e3ebdSchin else return vmresize(Vmheap,caddr,nsize,0);
54da2e3ebdSchin }
55da2e3ebdSchin
56da2e3ebdSchin static Vmdisc_t _Vmdcheap = { heapmem, NIL(Vmexcept_f), 0 };
57da2e3ebdSchin __DEFINE__(Vmdisc_t*,Vmdcheap,&_Vmdcheap);
58da2e3ebdSchin
59da2e3ebdSchin #ifdef NoF
60da2e3ebdSchin NoF(vmdcheap)
61da2e3ebdSchin #endif
62da2e3ebdSchin
63da2e3ebdSchin #endif
64