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fs_vms.c
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1994-04-15
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2KB
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69 lines
/*
* 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: 14 April 1994
*
* Copyright 1994 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 free storage");
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))) fatal ("Can't resize free storage");
}
/* Return a block of free storage
* Accepts: ** pointer to free storage block
*/
void fs_give (void **block)
{
free (*block);
*block = NIL;
}