fs_t20.c
上传用户:ycwykj01
上传日期:2007-01-04
资源大小:1819k
文件大小:2k
- /*
- * Program: Free storage management routines
- *
- * Author: Mark Crispin
- * Networks and Distributed Computing
- * Computing & Communications
- * University of Washington
- * Administration Building, AG-44
- * Seattle, WA 98195
- * Internet: MRC@CAC.Washington.EDU
- *
- * Date: 1 August 1988
- * Last Edited: 7 May 1999
- *
- * Copyright 1999 by the University of Washington
- *
- * Permission to use, copy, modify, and distribute this software and its
- * documentation for any purpose and without fee is hereby granted, provided
- * that the above copyright notice appears in all copies and that both the
- * above copyright notice and this permission notice appear in supporting
- * documentation, and that the name of the University of Washington not be
- * used in advertising or publicity pertaining to distribution of the software
- * without specific, written prior permission. This software is made available
- * "as is", and
- * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
- * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
- * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
- * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
- * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- */
- /* Get a block of free storage
- * Accepts: size of desired block
- * Returns: free storage block
- */
- void *fs_get (size_t size)
- {
- void *block = malloc (size ? size : (size_t) 1);
- if (!block) fatal ("Out of memory");
- return (block);
- }
- /* Resize a block of free storage
- * Accepts: ** pointer to current block
- * new size
- */
- void fs_resize (void **block,size_t size)
- {
- if (!(*block = realloc (*block,size ? size : (size_t) 1)))
- fatal ("Can't resize memory");
- }
- /* Return a block of free storage
- * Accepts: ** pointer to free storage block
- */
- void fs_give (void **block)
- {
- free (*block);
- *block = NIL;
- }