firesse/keepalive.h

#pragma once

#include <atomic>
#include <thread>

#include "index.h"

namespace firesse {

class KeepAlive {
  public:
	KeepAlive(const std::chrono::nanoseconds& max_stale, Index* index);
	~KeepAlive();

	void Start();
	void Stop();

  private:
	const std::chrono::nanoseconds max_stale_;
	Index* index_;

	// Two shutdown mechanisms, one for if we're in a tight no-syscall loop,
	// and one for if we're sleeping in poll()
	int shutdown_fd_;
	std::atomic<bool> running_ = true;

	std::thread thread_;
};

} // namespace firesse