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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Tango.Core.Threading
{
/// <summary>
/// Represents a task that will be awaited for a limited time.
/// If the timeout has reached, the task will return and will continue in the background.
/// </summary>
public class LimitedTimeTask
{
private Action _action;
private TimeSpan _timeout;
private bool _completed;
public LimitedTimeTask(Action action, TimeSpan timeout)
{
_action = action;
_timeout = timeout;
}
public Task Run()
{
TaskCompletionSource<Object> completion = new TaskCompletionSource<object>();
ThreadFactory.StartNew(() =>
{
try
{
_action?.Invoke();
if (!_completed)
{
_completed = true;
try
{
completion.SetResult(true);
}
catch { }
}
}
catch (Exception ex)
{
if (!_completed)
{
_completed = true;
try
{
completion.SetException(ex);
}
catch { }
}
}
});
TimeoutTask.StartNew(() =>
{
if (!_completed)
{
_completed = true;
try
{
completion.SetException(new TimeoutException($"The limited time task did not complete within the given time of {(int)_timeout.TotalMilliseconds} milliseconds and will continue in the background if possible."));
}
catch { }
}
}, _timeout);
return completion.Task;
}
public static Task StartNew(Action action, TimeSpan timeout)
{
return new LimitedTimeTask(action, timeout).Run();
}
}
}
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