summaryrefslogtreecommitdiff
path: root/include/timer.h
blob: 503fa82a2f460c1aa8c8bd705d206861608f9cd1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2006-2007 Craig Edwards <craigedwards@brainbox.cc>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#pragma once

class Module;

/** Timer class for one-second resolution timers
 * Timer provides a facility which allows module
 * developers to create one-shot timers. The timer
 * can be made to trigger at any time up to a one-second
 * resolution. To use Timer, inherit a class from
 * Timer, then insert your inherited class into the
 * queue using Server::AddTimer(). The Tick() method of
 * your object (which you have to override) will be called
 * at the given time.
 */
class CoreExport Timer
{
	/** The triggering time
	 */
	time_t trigger;

	/** Number of seconds between triggers
	 */
	unsigned int secs;

	/** True if this is a repeating timer
	 */
	bool repeat;

 public:
	/** Default constructor, initializes the triggering time
	 * @param secs_from_now The number of seconds from now to trigger the timer
	 * @param now The time now
	 * @param repeating Repeat this timer every secs_from_now seconds if set to true
	 */
	Timer(unsigned int secs_from_now, time_t now, bool repeating = false)
	{
		trigger = now + secs_from_now;
		secs = secs_from_now;
		repeat = repeating;
	}

	/** Default destructor, removes the timer from the timer manager
	 */
	virtual ~Timer();

	/** Retrieve the current triggering time
	 */
	time_t GetTrigger() const
	{
		return trigger;
	}

	/** Sets the trigger timeout to a new value
	 * This does not update the bookkeeping in TimerManager, use SetInterval()
	 * to change the interval between ticks while keeping TimerManager updated
	 */
	void SetTrigger(time_t nexttrigger)
	{
		trigger = nexttrigger;
	}

	/** Sets the interval between two ticks.
	 */
	void SetInterval(time_t interval);

	/** Called when the timer ticks.
	 * You should override this method with some useful code to
	 * handle the tick event.
	 * @param TIME The current time.
	 * @return True if the Timer object is still valid, false if it was destructed.
	 */
	virtual bool Tick(time_t TIME) = 0;

	/** Returns true if this timer is set to repeat
	 */
	bool GetRepeat() const
	{
		return repeat;
	}

	/** Returns the interval (number of seconds between ticks)
	 * of this timer object.
	 */
	unsigned int GetInterval() const
	{
		return secs;
	}

	/** Cancels the repeat state of a repeating timer.
	 * If you call this method, then the next time your
	 * timer ticks, it will be removed immediately after.
	 */
	void CancelRepeat()
	{
		repeat = false;
	}
};

typedef std::multimap<time_t, Timer*> TimerMap;

/** This class manages sets of Timers, and triggers them at their defined times.
 * This will ensure timers are not missed, as well as removing timers that have
 * expired and allowing the addition of new ones.
 */
class CoreExport TimerManager
{
	/** A list of all pending timers
	 */
	TimerMap Timers;

 public:
	/** Tick all pending Timers
	 * @param TIME the current system time
	 */
	void TickTimers(time_t TIME);

	/** Add an Timer
	 * @param T an Timer derived class to add
	 */
	void AddTimer(Timer *T);

	/** Remove a Timer
	 * @param T an Timer derived class to remove
	 */
	void DelTimer(Timer* T);
};