39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
#ifndef RINGBUFFER_H
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#define RINGBUFFER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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typedef struct {
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uint32_t head;
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uint32_t tail;
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uint32_t size;
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uint8_t data[];
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} ringbuffer;
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#define RINGBUFFER_STORAGE(NAME, SIZE) uint8_t buf_##NAME##__LINE__[sizeof(ringbuffer) + SIZE]; ringbuffer *NAME = (ringbuffer*)buf_##NAME##__LINE__;
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#define RINGBUFFER_INIT(NAME, SIZE) NAME->head = NAME->tail = 0; NAME->size = SIZE;
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#define RINGBUFFER(NAME, SIZE) \
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RINGBUFFER_STORAGE(NAME, SIZE); \
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RINGBUFFER_INIT(NAME, SIZE);
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void ringbuffer_rst(ringbuffer *buf);
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unsigned ringbuffer_capacity(ringbuffer *buf);
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unsigned ringbuffer_free(ringbuffer *buf);
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unsigned ringbuffer_level(ringbuffer *buf);
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unsigned ringbuffer_empty(ringbuffer *buf);
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unsigned ringbuffer_add(ringbuffer *buf, uint8_t *dat, unsigned len);
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unsigned ringbuffer_get(ringbuffer *buf, uint8_t *dst, unsigned len);
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unsigned ringbuffer_peek(ringbuffer *buf, uint8_t *dst, unsigned len);
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void ringbuffer_skip(ringbuffer *buf, unsigned len);
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#ifdef __cplusplus
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}
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#endif
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#endif
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