jellyfin/MediaBrowser.Server.Implementations/Threading/PeriodicTimer.cs
2016-10-23 22:42:19 -04:00

73 lines
1.8 KiB
C#

using System;
using System.Threading;
using Microsoft.Win32;
namespace MediaBrowser.Server.Implementations.Threading
{
public class PeriodicTimer : IDisposable
{
public Action<object> Callback { get; set; }
private Timer _timer;
private readonly object _state;
private readonly object _timerLock = new object();
private readonly TimeSpan _period;
public PeriodicTimer(Action<object> callback, object state, TimeSpan dueTime, TimeSpan period)
{
if (callback == null)
{
throw new ArgumentNullException("callback");
}
Callback = callback;
_period = period;
_state = state;
StartTimer(dueTime);
}
void SystemEvents_PowerModeChanged(object sender, PowerModeChangedEventArgs e)
{
if (e.Mode == PowerModes.Resume)
{
DisposeTimer();
StartTimer(Timeout.InfiniteTimeSpan);
}
}
private void TimerCallback(object state)
{
Callback(state);
}
private void StartTimer(TimeSpan dueTime)
{
lock (_timerLock)
{
_timer = new Timer(TimerCallback, _state, dueTime, _period);
SystemEvents.PowerModeChanged += SystemEvents_PowerModeChanged;
}
}
private void DisposeTimer()
{
SystemEvents.PowerModeChanged -= SystemEvents_PowerModeChanged;
lock (_timerLock)
{
if (_timer != null)
{
_timer.Dispose();
_timer = null;
}
}
}
public void Dispose()
{
DisposeTimer();
}
}
}