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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
* Copyright (C) 2009 Jonathan Gordon
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _SKIN_BUFFER_H_
#define _SKIN_BUFFER_H_
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
/* int the global buffer */
void skin_buffer_init(void);
/* get the number of bytes currently being used */
size_t skin_buffer_usage(void);
size_t skin_buffer_freespace(void);
/* Allocate size bytes from the buffer */
void* skin_buffer_alloc(size_t size);
/* Get a pointer to the skin buffer and the count of how much is free
* used to do your own buffer management.
* Any memory used will be overwritten next time wps_buffer_alloc()
* is called unless skin_buffer_increment() is called first
*
* This is from the start of the buffer, it is YOUR responsility to make
* sure you dont ever use more then *freespace, and bear in mind this will only
* be valid untill skin_buffer_alloc() is next called...
* so call skin_buffer_increment() and skin_buffer_freespace() regularly
*/
void* skin_buffer_grab(size_t *freespace);
/* Use after skin_buffer_grab() to specify how much buffer was used.
* align should always be true unless there is a possibility that you will need
* more space *immediatly* after the previous allocation. (i.e in an array).
* NEVER leave the buffer unaligned */
void skin_buffer_increment(size_t used, bool align);
/* free previously skin_buffer_increment()'ed space. This just moves the pointer
* back 'used' bytes so make sure you actually want to do this */
void skin_buffer_free_from_front(size_t used);
#endif /* _SKIN_BUFFER_H_ */
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