/src/rt/circular_buffer.h
http://github.com/jruderman/rust · C Header · 57 lines · 28 code · 11 blank · 18 comment · 0 complexity · d9edaf46db027d603e863185de8dcc33 MD5 · raw file
- /*
- *
- */
- #ifndef CIRCULAR_BUFFER_H
- #define CIRCULAR_BUFFER_H
- #include "rust_globals.h"
- #include "rust_kernel.h"
- class
- circular_buffer : public kernel_owned<circular_buffer> {
- static const size_t INITIAL_CIRCULAR_BUFFER_SIZE_IN_UNITS = 8;
- public:
- rust_kernel *kernel;
- // Size of the data unit in bytes.
- const size_t unit_sz;
- circular_buffer(rust_kernel *kernel, 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_t initial_size();
- void grow();
- void shrink();
- // Size of the buffer in bytes.
- 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;
- };
- //
- // Local Variables:
- // mode: C++
- // fill-column: 78;
- // indent-tabs-mode: nil
- // c-basic-offset: 4
- // buffer-file-coding-system: utf-8-unix
- // compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
- // End:
- //
- #endif /* CIRCULAR_BUFFER_H */