* Copyright (c) 2000, 2001, 2002, 2003, 2004 by Martin C. Shepherd.
* All rights reserved.
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, and/or sell copies of the Software, and to permit persons
* to whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
* OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
* INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* Except as contained in this notice, the name of a copyright holder
* shall not be used in advertising or otherwise to promote the sale, use
* or other dealings in this Software without prior written authorization
* of the copyright holder.
typedef struct StringMem StringMem;
* Applications that dynamically allocate lots of small strings
* run the risk of significantly fragmenting the heap. This module
* aims to reduce this risk by allocating large arrays of small fixed
* length strings, arranging them as a free-list and allowing
* callers to allocate from the list. Strings that are too long
* to be allocated from the free-list are allocated from the heap.
* Since typical implementations of malloc() eat up a minimum of
* 16 bytes per call to malloc() [because of alignment and space
* management constraints] it makes sense to set the free-list
* string size to 16 bytes. Note that unlike malloc() which typically
* keeps 8 bytes per allocation for its own use, our allocator will
* return all but one of the 16 bytes for use. One hidden byte of overhead
* is reserved for flagging whether the string was allocated directly
* from malloc or from the free-list.
* Set the length of each free-list string. The longest string that
* will be returned without calling malloc() will be one less than
* this number.
#define SM_STRLEN 16
* Create a string free-list container and the first block of its free-list.
StringMem *_new_StringMem(unsigned blocking_factor);
* Delete a string free-list.
StringMem *_del_StringMem(StringMem *sm, int force);
* Allocate an array of 'length' chars.
char *_new_StringMemString(StringMem *sm, size_t size);
* Free a string that was previously returned by _new_StringMemString().
char *_del_StringMemString(StringMem *sm, char *s);