45 lines
881 B
C
45 lines
881 B
C
/**
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* Definitions of ring buffers
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*/
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#ifndef __RING_BUFFER_H
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#define __RING_BUFFER_H
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#include "types.h"
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#define MAX_BUFFER_SIZE 128
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// A ring buffer of unsigned words
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typedef struct s_word_ring {
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unsigned short buffer[MAX_BUFFER_SIZE];
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unsigned short head;
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unsigned short tail;
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} t_word_ring, *p_word_ring;
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//
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// Initialize the byte ring buffer
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//
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extern void rb_word_init(p_word_ring r);
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//
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// Return true if the ring buffer is full
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//
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extern unsigned short rb_word_full(p_word_ring r);
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//
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// Return true if the ring buffer is empty
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//
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extern unsigned short rb_word_empty(p_word_ring r);
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//
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// Add a byte to the ring buffer... data is lost if buffer is full
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//
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extern void rb_word_put(p_word_ring r, unsigned short data);
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//
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// Get a byte from the ring buffer... returns 0 if the buffer is empty
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//
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extern unsigned short rb_word_get(p_word_ring r);
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#endif
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