openpcd/firmware/src/os/fifo.h @ master
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#ifndef _FIFO_H
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#define _FIFO_H
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#include <sys/types.h>
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#define FIFO_SIZE 1024
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struct fifo { |
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uint16_t size; /* actual FIFO size, can be smaller than 'data' */ |
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uint16_t producer; /* index of producer */ |
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uint16_t consumer; /* index of consumer */ |
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uint16_t watermark; |
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uint8_t irq; |
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uint8_t irq_en; |
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uint8_t status; |
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void (*callback)(struct fifo *fifo, uint8_t event, void *data); |
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void *cb_data; |
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uint8_t data[FIFO_SIZE]; |
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};
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extern int fifo_init(struct fifo *fifo, uint16_t size, |
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void (*callback)(struct fifo *fifo, uint8_t event, void *data), void *cb_data); |
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extern uint16_t fifo_data_get(struct fifo *fifo, uint16_t len, uint8_t *data); |
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extern uint16_t fifo_data_put(struct fifo *fifo, uint16_t len, uint8_t *data); |
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extern int fifo_available(struct fifo *fifo); |
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#endif
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