71 lines
2.4 KiB
C
71 lines
2.4 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) 2023 William Wilgus
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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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#ifndef _CHUNKALLOC_H_
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#define _CHUNKALLOC_H_
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#include <stdbool.h>
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#include <string.h>
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#include "config.h"
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#include "buflib.h"
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#define CHUNK_ALLOC_INVALID ((size_t)-1)
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struct chunk_alloc_header
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{
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struct buflib_context *context; /* buflib context for all allocations */
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int chunk_handle; /* data handle of buflib allocated array of struct chunk */
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size_t chunk_bytes_total; /* total bytes in current chunk */
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size_t chunk_bytes_free; /* free bytes in current chunk */
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size_t chunk_size; /* default chunk size */
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size_t count; /* total chunks possible */
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size_t current; /* current chunk in use */
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struct {
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int handle;
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size_t min_offset;
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size_t max_offset;
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} cached_chunk;
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};
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void chunk_alloc_free(struct chunk_alloc_header *hdr);
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bool chunk_alloc_init(struct chunk_alloc_header *hdr,
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struct buflib_context *ctx,
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size_t chunk_size, size_t max_chunks);
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bool chunk_realloc(struct chunk_alloc_header *hdr,
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size_t chunk_size, size_t max_chunks);
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void chunk_alloc_finalize(struct chunk_alloc_header *hdr);
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size_t chunk_alloc(struct chunk_alloc_header *hdr, size_t size); /* Returns offset */
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void* chunk_get_data(struct chunk_alloc_header *hdr, size_t offset); /* Returns data */
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void chunk_put_data(struct chunk_alloc_header *hdr, void* data, size_t offset);
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static inline bool chunk_alloc_is_initialized(struct chunk_alloc_header *hdr)
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{
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return (hdr->chunk_handle > 0);
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}
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#endif
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