65 lines
1.1 KiB
C
65 lines
1.1 KiB
C
#include "device_ring_buffer.h"
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void rb_initialize(struct rb* _rb)
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{
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memset(_rb, 0, sizeof(struct rb));
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}
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int rb_put(struct rb* _rb, char element)
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{
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if (_rb->count < sizeof(_rb->buf))
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{
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_rb->count++;
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if (_rb->tail != _rb->head)
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{
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_rb->buf[_rb->tail] = element;
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_rb->tail++;
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if (_rb->tail == sizeof(_rb->buf))
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{
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_rb->tail = 0;
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}
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return 1;
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}
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else
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{
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return 0;
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}
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}
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else
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{
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return -1;
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}
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}
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int rb_get(struct rb* _rb, char *element)
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{
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if (_rb->count > 0)
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{
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_rb->count--;
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if (_rb->tail != _rb->head)
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{
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*element = _rb->buf[_rb->head];
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_rb->head++;
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if (_rb->head == sizeof(_rb->buf))
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{
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_rb->head = 0;
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}
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return 1;
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}
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else
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{
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return 0;
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}
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}
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else
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{
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return -1;
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}
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}
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int count_elements(struct rb* _rb)
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{
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return _rb->count;
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}
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