56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
/*
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*
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*/
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#ifndef CIRCULAR_BUFFER_H
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#define CIRCULAR_BUFFER_H
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class
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circular_buffer : public kernel_owned<circular_buffer> {
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static const size_t INITIAL_CIRCULAR_BUFFER_SIZE_IN_UNITS = 8;
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static const size_t MAX_CIRCULAR_BUFFER_SIZE = 1 << 24;
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public:
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rust_kernel *kernel;
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// Size of the data unit in bytes.
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const size_t unit_sz;
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circular_buffer(rust_kernel *kernel, size_t unit_sz);
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~circular_buffer();
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void transfer(void *dst);
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void enqueue(void *src);
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void dequeue(void *dst);
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uint8_t *peek();
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bool is_empty();
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size_t size();
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private:
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size_t initial_size();
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void grow();
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void shrink();
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// Size of the buffer in bytes.
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size_t _buffer_sz;
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// Byte offset within the buffer where to read the next unit of data.
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size_t _next;
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// Number of bytes that have not been read from the buffer.
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size_t _unread;
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// The buffer itself.
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uint8_t *_buffer;
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};
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//
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// Local Variables:
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// mode: C++
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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//
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#endif /* CIRCULAR_BUFFER_H */
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