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libmisc/high_water_alloc.c
45 строк
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Mike Frysinger
licensing: clean up LGPL boilerplate for library code
13 янв 2024, 08:36
13 янв 2024, 08:36
c769e17
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/* File: high_water_alloc.c Copyright (C) 2001-2002 Silicon Graphics, Inc. All Rights Reserved. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, see <https://www.gnu.org/licenses/>. */ #include "config.h" #include <stdio.h> #include <stdlib.h> #include "misc.h" int __acl_high_water_alloc(void **buf, size_t *bufsize, size_t newsize) { #define CHUNK_SIZE 256 /* * Goal here is to avoid unnecessary memory allocations by * using static buffers which only grow when necessary. * Size is increased in fixed size chunks (CHUNK_SIZE). */ if (*bufsize < newsize) { void *newbuf; newsize = (newsize + CHUNK_SIZE-1) & ~(CHUNK_SIZE-1); newbuf = realloc(*buf, newsize); if (!newbuf) return 1; *buf = newbuf; *bufsize = newsize; } return 0; }