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/* ========================================================================
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* Copyright 1988-2006 University of Washington
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* ========================================================================
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* Program: Free storage management routines
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* Author: Mark Crispin
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* Networks and Distributed Computing
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* Computing & Communications
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* University of Washington
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* Administration Building, AG-44
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* Internet: MRC@CAC.Washington.EDU
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* Last Edited: 30 August 2006
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/* Get a block of free storage
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* Accepts: size of desired block
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* Returns: free storage block
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void *fs_get (size_t size)
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blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
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void *data = (*bn) (BLOCK_SENSITIVE,NIL);
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void *block = malloc (size ? size : (size_t) 1);
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if (!block) fatal ("Out of memory");
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(*bn) (BLOCK_NONSENSITIVE,data);
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/* Resize a block of free storage
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* Accepts: ** pointer to current block
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void fs_resize (void **block,size_t size)
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blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
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void *data = (*bn) (BLOCK_SENSITIVE,NIL);
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if (!(*block = realloc (*block,size ? size : (size_t) 1)))
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fatal ("Can't resize memory");
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(*bn) (BLOCK_NONSENSITIVE,data);
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/* Return a block of free storage
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* Accepts: ** pointer to free storage block
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void fs_give (void **block)
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blocknotify_t bn = (blocknotify_t) mail_parameters (NIL,GET_BLOCKNOTIFY,NIL);
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void *data = (*bn) (BLOCK_SENSITIVE,NIL);
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(*bn) (BLOCK_NONSENSITIVE,data);