timer.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * Copyright (C) 2019, Google Inc.
 *
 * Generic timer
 */

#pragma once

#include <chrono>

#include <libcamera/base/private.h>

#include <libcamera/base/object.h>
#include <libcamera/base/signal.h>

namespace libcamera {

class Message;

class Timer : public Object
{
public:
    Timer(Object *parent = nullptr);
    ~Timer();

    void start(std::chrono::milliseconds duration);
    void start(std::chrono::steady_clock::time_point deadline);
    void stop();
    bool isRunning() const;

    std::chrono::steady_clock::time_point deadline() const { return deadline_; }

    Signal<> timeout;

protected:
    void message(Message *msg) override;

private:
    void registerTimer();
    void unregisterTimer();

    bool running_;
    std::chrono::steady_clock::time_point deadline_;
};

} /* namespace libcamera */