104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018-08-25 armink the first version
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*/
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#ifndef _RINGBLK_BUF_H_
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#define _RINGBLK_BUF_H_
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/*
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* Introduction:
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* The rbb is the ring buffer which is composed with many blocks. It is different from the ring buffer.
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* The ring buffer is only composed with chars. The rbb put and get supported zero copies. So the rbb
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* is very suitable for put block and get block by a certain order. Such as DMA block transmit,
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* communicate frame send/recv, and so on.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum rt_rbb_status
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{
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/* unused status when first initialize or after blk_free() */
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RT_RBB_BLK_UNUSED,
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/* initialized status after blk_alloc() */
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RT_RBB_BLK_INITED,
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/* put status after blk_put() */
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RT_RBB_BLK_PUT,
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/* get status after blk_get() */
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RT_RBB_BLK_GET,
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};
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typedef enum rt_rbb_status rt_rbb_status_t;
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/**
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* the block of rbb
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*/
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struct rt_rbb_blk
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{
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rt_rbb_status_t status :8;
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/* less then 2^24 */
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rt_size_t size :24;
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rt_uint8_t *buf;
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rt_slist_t list;
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};
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typedef struct rt_rbb_blk *rt_rbb_blk_t;
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/**
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* Rbb block queue: the blocks (from block1->buf to blockn->buf) memory which on this queue is continuous.
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*/
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struct rt_rbb_blk_queue
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{
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rt_rbb_blk_t blocks;
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rt_size_t blk_num;
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};
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typedef struct rt_rbb_blk_queue *rt_rbb_blk_queue_t;
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/**
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* ring block buffer
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*/
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struct rt_rbb
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{
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rt_uint8_t *buf;
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rt_size_t buf_size;
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/* all of blocks */
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rt_rbb_blk_t blk_set;
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rt_size_t blk_max_num;
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/* saved the initialized and put status blocks */
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rt_slist_t blk_list;
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};
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typedef struct rt_rbb *rt_rbb_t;
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/* rbb (ring block buffer) API */
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void rt_rbb_init(rt_rbb_t rbb, rt_uint8_t *buf, rt_size_t buf_size, rt_rbb_blk_t block_set, rt_size_t blk_max_num);
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rt_rbb_t rt_rbb_create(rt_size_t buf_size, rt_size_t blk_max_num);
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void rt_rbb_destroy(rt_rbb_t rbb);
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rt_size_t rt_rbb_get_buf_size(rt_rbb_t rbb);
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/* rbb block API */
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rt_rbb_blk_t rt_rbb_blk_alloc(rt_rbb_t rbb, rt_size_t blk_size);
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void rt_rbb_blk_put(rt_rbb_blk_t block);
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rt_rbb_blk_t rt_rbb_blk_get(rt_rbb_t rbb);
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rt_size_t rt_rbb_blk_size(rt_rbb_blk_t block);
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rt_uint8_t *rt_rbb_blk_buf(rt_rbb_blk_t block);
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void rt_rbb_blk_free(rt_rbb_t rbb, rt_rbb_blk_t block);
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/* rbb block queue API */
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rt_size_t rt_rbb_blk_queue_get(rt_rbb_t rbb, rt_size_t queue_data_len, rt_rbb_blk_queue_t blk_queue);
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rt_size_t rt_rbb_blk_queue_len(rt_rbb_blk_queue_t blk_queue);
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rt_uint8_t *rt_rbb_blk_queue_buf(rt_rbb_blk_queue_t blk_queue);
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void rt_rbb_blk_queue_free(rt_rbb_t rbb, rt_rbb_blk_queue_t blk_queue);
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rt_size_t rt_rbb_next_blk_queue_len(rt_rbb_t rbb);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RINGBLK_BUF_H_ */
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