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 * Eclipse Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.eclipse.org/org/documents/epl-v10.html *
11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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 #include <vmalloc.h>
23
24 /*
25 * vm open/close/resize - a handy default for discipline memory functions
26 *
27 * vmgetmem(0,0,0) open new region
28 * vmgetmem(r,0,0) free region
29 * vmgetmem(r,0,n) allocate n bytes initialized to 0
30 * vmgetmem(r,p,0) free p
31 * vmgetmem(r,p,n) realloc p to n bytes
32 *
33 * Written by Glenn S. Fowler.
34 */
35
36 #if __STD_C
vmgetmem(Vmalloc_t * vm,Void_t * data,size_t size)37 Void_t* vmgetmem(Vmalloc_t* vm, Void_t* data, size_t size)
38 #else
39 Void_t* vmgetmem(vm, data, size)
40 Vmalloc_t* vm;
41 Void_t* data;
42 size_t size;
43 #endif
44 {
45 if (!vm)
46 return vmopen(Vmdcheap, Vmbest, 0);
47 if (data || size)
48 return vmresize(vm, data, size, VM_RSMOVE|VM_RSCOPY|VM_RSZERO);
49 vmclose(vm);
50 return 0;
51 }
52