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/*
*
*/
#ifndef CIRCULAR_BUFFER_H
#define CIRCULAR_BUFFER_H
class
circular_buffer : public dom_owned<circular_buffer> {
static const size_t INITIAL_CIRCULAR_BUFFFER_SIZE_IN_UNITS = 8;
static const size_t MAX_CIRCULAR_BUFFFER_SIZE = 1 << 24;
public:
rust_dom *dom;
// Size of the data unit in bytes.
const size_t unit_sz;
circular_buffer(rust_dom *dom, size_t unit_sz);
~circular_buffer();
void transfer(void *dst);
void enqueue(void *src);
void dequeue(void *dst);
uint8_t *peek();
bool is_empty();
size_t size();
private:
// Size of the buffer in bytes, should always be a power of two so that
// modulo arithmetic (x % _buffer_sz) can optimized away with
// (x & (_buffer_sz - 1)).
size_t _buffer_sz;
// Byte offset within the buffer where to read the next unit of data.
size_t _next;
// Number of bytes that have not been read from the buffer.
size_t _unread;
// The buffer itself.
uint8_t *_buffer;
};
#endif /* CIRCULAR_BUFFER_H */
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