9e07ef2b0a
Massive thanks to Michael Chicoine and other testers for finding the early bugs. This removes all skin memory limitations git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30991 a1c6a512-1295-4272-9138-f99709370657
109 lines
3.3 KiB
C
109 lines
3.3 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) 2010 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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#include "skin_buffer.h"
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#include "skin_parser.h"
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/****************************************************************************
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*
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* This code handles buffer allocation for the entire skin system.
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* This needs to work in 3 different situations:
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* 1) as a stand alone library. ROCKBOX isnt defined, alloc using malloc()
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* and free the skin elements only (no callbacks doing more allocation)
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* 2) ROCKBOX builds for normal targets, alloc from a single big buffer
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* which origionally came from the audio buffer, likely to run out of
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* room with large themes. No need to free anything, just restore to
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* the start of our buffer
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* 3) ROCKBOX "application/hosted" builds, alloc using the hosts malloc().
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* We need to keep track of all allocations so they can be free()'d easily
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*
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*
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****************************************************************************/
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#ifdef ROCKBOX
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#include "config.h"
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#include "skin_debug.h"
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static size_t buf_size;
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static unsigned char *buffer_start = NULL;
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static unsigned char *buffer_front = NULL;
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#ifndef __PCTOOL__
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long skin_buffer_to_offset(void *pointer)
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{
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return pointer == NULL ? -1 : (void*)pointer - (void*)buffer_start;
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}
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void* skin_buffer_from_offset(long offset)
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{
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return offset < 0 ? NULL : buffer_start + offset;
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}
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#endif
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void skin_buffer_init(char* buffer, size_t size)
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{
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buffer_start = buffer_front = buffer;
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buf_size = size;
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}
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/* Allocate size bytes from the buffer */
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#ifdef DEBUG_SKIN_ALLOCATIONS
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void* skin_buffer_alloc_ex(size_t size, char* debug)
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{
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void *retval = NULL;
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printf("%d %s\n", size, debug);
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#else
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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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#endif
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/* 32-bit aligned */
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size = (size + 3) & ~3;
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if (size > skin_buffer_freespace())
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{
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skin_error(MEMORY_LIMIT_EXCEEDED, NULL);
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return NULL;
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}
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retval = buffer_front;
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buffer_front += size;
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return retval;
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}
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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_start;
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}
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size_t skin_buffer_freespace(void)
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{
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return buf_size - skin_buffer_usage();
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}
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#else
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void* skin_buffer_alloc(size_t size)
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{
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return malloc(size);
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}
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#endif
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