2 File: high_water_alloc.c
4 Copyright (C) 2001-2002 Silicon Graphics, Inc. All Rights Reserved.
6 This program is free software; you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License as published by the
8 Free Software Foundation; either version 2.1 of the License, or (at
9 your option) any later version.
11 This program is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with this program. If not, see <http://www.gnu.org/licenses/>.
24 int high_water_alloc(void **buf, size_t *bufsize, size_t newsize)
26 #define CHUNK_SIZE 256
28 * Goal here is to avoid unnecessary memory allocations by
29 * using static buffers which only grow when necessary.
30 * Size is increased in fixed size chunks (CHUNK_SIZE).
32 if (*bufsize < newsize) {
35 newsize = (newsize + CHUNK_SIZE-1) & ~(CHUNK_SIZE-1);
36 newbuf = realloc(*buf, newsize);