1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 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 24void _STUB_vmdcheap(){} 25 26#else 27 28#include "vmhdr.h" 29 30/* A discipline to get memory from the heap. 31** 32** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94. 33*/ 34#if __STD_C 35static Void_t* heapmem(Vmalloc_t* vm, Void_t* caddr, 36 size_t csize, size_t nsize, 37 Vmdisc_t* disc) 38#else 39static Void_t* heapmem(vm, caddr, csize, nsize, disc) 40Vmalloc_t* vm; /* region doing allocation from */ 41Void_t* caddr; /* current low address */ 42size_t csize; /* current size */ 43size_t nsize; /* new size */ 44Vmdisc_t* disc; /* discipline structure */ 45#endif 46{ 47 NOTUSED(vm); 48 NOTUSED(disc); 49 50 if(csize == 0) 51 return vmalloc(Vmheap,nsize); 52 else if(nsize == 0) 53 return vmfree(Vmheap,caddr) >= 0 ? caddr : NIL(Void_t*); 54 else return vmresize(Vmheap,caddr,nsize,0); 55} 56 57static Vmdisc_t _Vmdcheap = { heapmem, NIL(Vmexcept_f), 0 }; 58__DEFINE__(Vmdisc_t*,Vmdcheap,&_Vmdcheap); 59 60#ifdef NoF 61NoF(vmdcheap) 62#endif 63 64#endif 65