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/* ========================================================================
* Copyright 1988-2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* 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: 30 August 2006
*/
/* Get a block of free storage
* Accepts: size of desired block
* Returns: free storage block
*/
void *fs_get (size_t size)
{
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
void *data = (*bn) (BLOCK_SENSITIVE,NIL);
void *block = malloc (size ? size : (size_t) 1);
if (!block) fatal ("Out of memory");
(*bn) (BLOCK_NONSENSITIVE,data);
return (block);
}
/* Resize a block of free storage
* Accepts: ** pointer to current block
* new size
*/
void fs_resize (void **block,size_t size)
{
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
void *data = (*bn) (BLOCK_SENSITIVE,NIL);
if (!(*block = realloc (*block,size ? size : (size_t) 1)))
fatal ("Can't resize memory");
(*bn) (BLOCK_NONSENSITIVE,data);
}
/* Return a block of free storage
* Accepts: ** pointer to free storage block
*/
void fs_give (void **block)
{
blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
void *data = (*bn) (BLOCK_SENSITIVE,NIL);
free (*block);
*block = NIL;
(*bn) (BLOCK_NONSENSITIVE,data);
}
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