libcamera v0.0.0
Supporting cameras in Linux since 2019
timer.h
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1/* SPDX-License-Identifier: LGPL-2.1-or-later */
2/*
3 * Copyright (C) 2019, Google Inc.
4 *
5 * timer.h - Generic timer
6 */
7
8#pragma once
9
10#include <chrono>
11#include <stdint.h>
12
13#include <libcamera/base/private.h>
14
17
18namespace libcamera {
19
20class Message;
21
22class Timer : public Object
23{
24public:
25 Timer(Object *parent = nullptr);
26 ~Timer();
27
28 void start(unsigned int msec) { start(std::chrono::milliseconds(msec)); }
29 void start(std::chrono::milliseconds duration);
30 void start(std::chrono::steady_clock::time_point deadline);
31 void stop();
32 bool isRunning() const;
33
34 std::chrono::steady_clock::time_point deadline() const { return deadline_; }
35
37
38protected:
39 void message(Message *msg) override;
40
41private:
42 void registerTimer();
43 void unregisterTimer();
44
45 bool running_;
46 std::chrono::steady_clock::time_point deadline_;
47};
48
49} /* namespace libcamera */
A message that can be posted to a Thread.
Definition: message.h:22
Base object to support automatic signal disconnection.
Definition: object.h:25
Object * parent() const
Retrieve the object's parent.
Definition: object.h:47
Generic signal and slot communication mechanism.
Definition: signal.h:39
Single-shot timer interface.
Definition: timer.h:23
bool isRunning() const
Check if the timer is running.
Definition: timer.cpp:154
void message(Message *msg) override
Message handler for the object.
Definition: timer.cpp:172
std::chrono::steady_clock::time_point deadline() const
Retrieve the timer deadline.
Definition: timer.h:34
void start(unsigned int msec)
Start or restart the timer with a timeout of msec.
Definition: timer.h:28
void stop()
Stop the timer.
Definition: timer.cpp:125
Signal timeout
Signal emitted when the timer times out.
Definition: timer.h:36
Timer(Object *parent=nullptr)
Construct a timer.
Definition: timer.cpp:55
Top-level libcamera namespace.
Definition: backtrace.h:17
Base object to support automatic signal disconnection.
Signal & slot implementation.