| 34f655c1 |
1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: arena.c,v 1.1 2000/06/17 10:37:53 mdw Exp $ |
| 4 | * |
| 5 | * Abstraction for memory allocation arenas |
| 6 | * |
| 7 | * (c) 2000 Straylight/Edgeware |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of the mLib utilities library. |
| 13 | * |
| 14 | * mLib is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU Library General Public License as |
| 16 | * published by the Free Software Foundation; either version 2 of the |
| 17 | * License, or (at your option) any later version. |
| 18 | * |
| 19 | * mLib is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU Library General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU Library General Public |
| 25 | * License along with mLib; if not, write to the Free |
| 26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 27 | * MA 02111-1307, USA. |
| 28 | */ |
| 29 | |
| 30 | /*----- Revision history --------------------------------------------------* |
| 31 | * |
| 32 | * $Log: arena.c,v $ |
| 33 | * Revision 1.1 2000/06/17 10:37:53 mdw |
| 34 | * Basic arena management. |
| 35 | * |
| 36 | */ |
| 37 | |
| 38 | /*----- Header files ------------------------------------------------------*/ |
| 39 | |
| 40 | #include <stdlib.h> |
| 41 | |
| 42 | #include "arena.h" |
| 43 | |
| 44 | /*----- The standard arena ------------------------------------------------*/ |
| 45 | |
| 46 | static void *_alloc(arena *a, size_t sz) { return malloc(sz); } |
| 47 | static void *_realloc(arena *a, void *p, size_t sz){ return realloc(p, sz); } |
| 48 | static void _free(arena *a, void *p) { free (p); } |
| 49 | |
| 50 | static arena_ops stdlib_ops = { _alloc, _realloc, _free, 0 }; |
| 51 | arena arena_stdlib = { &stdlib_ops }; |
| 52 | |
| 53 | /*----- Global variables --------------------------------------------------*/ |
| 54 | |
| 55 | arena *arena_global = &arena_stdlib; |
| 56 | |
| 57 | /*----- Main code ---------------------------------------------------------*/ |
| 58 | |
| 59 | /* --- @arena_fakerealloc@ --- * |
| 60 | * |
| 61 | * Arguments: @arena *a@ = pointer to arena block |
| 62 | * @void *p@ = pointer to memory block to resize |
| 63 | * @size_t sz@ = size desired for the block |
| 64 | * |
| 65 | * Returns: --- |
| 66 | * |
| 67 | * Use: Standard fake @realloc@ function, for use if you don't |
| 68 | * support @realloc@ properly. |
| 69 | */ |
| 70 | |
| 71 | void *arena_fakerealloc(arena *a, void *p, size_t sz) |
| 72 | { |
| 73 | void *q = A_ALLOC(a, sz); |
| 74 | if (!q) |
| 75 | return (0); |
| 76 | memcpy(q, p, sz); |
| 77 | A_FREE(a, p); |
| 78 | return (q); |
| 79 | } |
| 80 | |
| 81 | /* --- Function equivalents of the macros --- */ |
| 82 | |
| 83 | void *a_alloc(arena *a, size_t sz) { return (A_ALLOC(a, sz)); } |
| 84 | void *a_realloc(arena *a, void *p, size_t sz) { return A_REALLOC(a, p, sz); } |
| 85 | void a_free(arena *a, void *p) { A_FREE(a, p); } |
| 86 | |
| 87 | /*----- That's all, folks -------------------------------------------------*/ |
~mdw / mLib / blame