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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <LibCore/Timer.h>
28
29namespace Core {
30
31Timer::Timer(Object* parent)
32 : Object(parent)
33{
34}
35
36Timer::Timer(int interval, Function<void()>&& timeout_handler, Object* parent)
37 : Object(parent)
38 , on_timeout(move(timeout_handler))
39{
40 start(interval);
41}
42
43Timer::~Timer()
44{
45}
46
47void Timer::start()
48{
49 start(m_interval);
50}
51
52void Timer::start(int interval)
53{
54 if (m_active)
55 return;
56 m_interval = interval;
57 start_timer(interval);
58 m_active = true;
59}
60
61void Timer::restart(int interval)
62{
63 if (m_active)
64 stop();
65 start(interval);
66}
67
68void Timer::stop()
69{
70 if (!m_active)
71 return;
72 stop_timer();
73 m_active = false;
74}
75
76void Timer::timer_event(TimerEvent&)
77{
78 if (m_single_shot)
79 stop();
80 else {
81 if (m_interval_dirty) {
82 stop();
83 start(m_interval);
84 }
85 }
86
87 if (on_timeout)
88 on_timeout();
89}
90
91}