95b0cefad0
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26887 a1c6a512-1295-4272-9138-f99709370657
71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id: skin_buffer.c 25962 2010-05-12 09:31:40Z jdgordon $
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing
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* Copyright (C) 2009 Jonathan Gordon
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#ifdef ROCKBOX
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#define SKIN_BUFFER_SIZE (400*1024) /* Excessivly large for now */
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static unsigned char buffer[SKIN_BUFFER_SIZE];
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static unsigned char *buffer_front = NULL; /* start of the free space,
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increases with allocation*/
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#endif
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void skin_buffer_init(void)
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{
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#if defined(ROCKBOX)
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{
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/* reset the buffer.... */
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buffer_front = buffer;
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//TODO: buf_size = size;
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}
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#endif
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}
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/* Allocate size bytes from the buffer */
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void* skin_buffer_alloc(size_t size)
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{
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void *retval = NULL;
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#ifdef ROCKBOX
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retval = buffer_front;
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buffer_front += size;
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/* 32-bit aligned */
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buffer_front = (void *)(((unsigned long)buffer_front + 3) & ~3);
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#else
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retval = malloc(size);
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#endif
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return retval;
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}
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#ifdef ROCKBOX
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/* get the number of bytes currently being used */
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size_t skin_buffer_usage(void)
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{
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return buffer_front - buffer;
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}
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size_t skin_buffer_freespace(void)
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{
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return SKIN_BUFFER_SIZE - skin_buffer_usage();
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}
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#endif
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