forked from len0rd/rockbox
cf87597226
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21020 a1c6a512-1295-4272-9138-f99709370657
63 lines
2 KiB
C
63 lines
2 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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* $Id$
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*
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* Copyright (C) 2008 Dan Everton (safetydan)
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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 "plugin.h"
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#include "rockmalloc.h"
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#include "malloc.c"
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void *rocklua_morecore(int size)
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{
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static char *sbrk_top = NULL;
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static ssize_t total_size = 0;
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void *ptr = 0;
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if (size > 0) {
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size = size + 4 - (size % 4);
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if (sbrk_top == NULL) {
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sbrk_top = rb->plugin_get_buffer((size_t *) &total_size);
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}
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if (sbrk_top == NULL || size + 4 > abs(total_size)) {
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/* Try the audio buffer */
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sbrk_top = rb->plugin_get_audio_buffer((size_t *) &total_size);
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if(sbrk_top == NULL || size + 4 > abs(total_size)) {
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printf("malloc failed for %d!\n", size);
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return (void *) MFAIL;
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}
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}
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ptr = sbrk_top + 4;
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*((unsigned int *) sbrk_top) = size;
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sbrk_top += size + 4;
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total_size -= size + 4;
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return ptr;
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} else if (size < 0) {
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/* we don't currently support shrink behavior */
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return (void *) MFAIL;
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} else {
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return sbrk_top;
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}
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}
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