52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#ifndef CIRCULAR_BUF_INTERFACE_H
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#define CIRCULAR_BUF_INTERFACE_H
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#include "generic/typedef.h"
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typedef struct _cbuffer {
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u8 *begin;
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u8 *end;
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u8 *read_ptr;
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u8 *write_ptr;
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u8 *tmp_ptr ;
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u32 tmp_len;
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u32 data_len;
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u32 total_len;
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} cbuffer_t;
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extern void cbuf_init(cbuffer_t *cbuffer, void *buf, u32 size);
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extern u32 cbuf_read(cbuffer_t *cbuffer, void *buf, u32 len);
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extern u32 cbuf_write(cbuffer_t *cbuffer, void *buf, u32 len);
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extern u32 cbuf_is_write_able(cbuffer_t *cbuffer, u32 len);
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extern void *cbuf_write_alloc(cbuffer_t *cbuffer, u32 *len);
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extern void cbuf_write_updata(cbuffer_t *cbuffer, u32 len);
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void *cbuf_read_alloc(cbuffer_t *cbuffer, u32 *len);
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void cbuf_read_updata(cbuffer_t *cbuffer, u32 len);
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void cbuf_clear(cbuffer_t *cbuffer);
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u32 cbuf_rewrite(cbuffer_t *cbuffer, void *begin, void *buf, u32 len);
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void cbuf_discard_prewrite(cbuffer_t *cbuffer);
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void cbuf_updata_prewrite(cbuffer_t *cbuffer);
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u32 cbuf_prewrite(cbuffer_t *cbuffer, void *buf, u32 len);
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#define cbuf_get_writeptr(a) (a)->write_ptr
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#define cbuf_get_data_size(a) (a)->data_len
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#define cbuf_get_readptr(a ) (a)->read_ptr
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#endif
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