30 lines
1002 B
C
30 lines
1002 B
C
#ifndef __BOUNDEDBUFFER_H__
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#define __BOUNDEDBUFFER_H__
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/*
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* For some reasons, our ring buffer (aka BSB ring buffer)
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* can only hold size - 1 elements.
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* If we want to store BOUNDEDBUFFER_SIZE elements, as desired,
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* the buffer must be one element larger.
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* Hence, BOUNDEDBUFFER_SIZE_REAL is used for allocating the actual buffer
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* and used for the size member.
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*/
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#ifndef BOUNDEDBUFFER_SIZE
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#error Buffer size not defined!
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#endif
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#define BOUNDEDBUFFER_SIZE_REAL (BOUNDEDBUFFER_SIZE + 1)
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#define BOUNDEDBUFFER_SIZE_VIRT (BOUNDEDBUFFER_SIZE_REAL - 1)
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struct boundedbuffer {
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int next_in;
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int next_out;
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int size;
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BOUNDEDBUFFER_STORAGE_TYPE data[BOUNDEDBUFFER_SIZE_REAL];
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};
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void init_bbuffer(struct boundedbuffer *buffer);
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int is_full(struct boundedbuffer *buffer);
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int is_empty(struct boundedbuffer *buffer);
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int produce(struct boundedbuffer *buffer, BOUNDEDBUFFER_STORAGE_TYPE data);
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int consume(struct boundedbuffer *buffer, BOUNDEDBUFFER_STORAGE_TYPE *ret);
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#endif // __BOUNDEDBUFFER_H__
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