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 */