// -*- mode: c++; c-basic-offset: 2; -*-

#ifndef BUFFER_HH
#define BUFFER_HH

#include <cstddef>

class Buffer {
public:
  virtual ~Buffer() {}

  static Buffer* create(size_t capacity, size_t min_avail);

  bool empty() const;

  virtual void const* read_ptr(size_t* avail) const = 0;
  virtual void consume(size_t bytes) = 0;

  virtual void* write_ptr(size_t* avail) = 0;
  virtual void commit(size_t bytes) = 0;

  size_t read(void* data, size_t max);
  void write(void const* data, size_t size);

  void clear();

protected:
  Buffer() {}
  Buffer(Buffer const&) = delete;
};

#endif  // BUFFER_HH