84 lines
2.8 KiB
C#
84 lines
2.8 KiB
C#
using System;
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using System.Threading.Tasks;
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using CoCoL;
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namespace Duplicati.GUI.TrayIcon;
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/// <summary>
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/// A class that delays the execution of actions.
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/// </summary>
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public class ProcessBasedActionDelay : IDisposable
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{
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/// <summary>
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/// The channel that sends the delayed actions, buffer avoids deadlocks if multiple events are queued before starting.
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/// </summary>
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private readonly IChannel<Action> m_inboundActionChannel = Channel.Create<Action>(name: "UI Action", buffersize: 500);
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/// <summary>
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/// The channel that sends the start signal.
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/// </summary>
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private readonly IChannel<bool> m_initializedChannel = Channel.Create<bool>(name: "UI Initializer");
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/// <summary>
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/// Reference to the task running
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/// </summary>
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private readonly Task m_task;
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/// <summary>
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/// Initializes a new instance of the <see cref="ProcessBasedActionDelay"/> class.
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/// </summary>
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public ProcessBasedActionDelay()
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{
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m_task = RunProcessor(m_inboundActionChannel.AsReadOnly(), m_initializedChannel.AsReadOnly());
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}
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/// <summary>
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/// Runs the processor process, which pauses until a ready signal is received.
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/// </summary>
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/// <param name="inboundChannel">The channel with actions to be delayed.</param>
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/// <param name="initializedChannel">The channel that sends the start signal.</param>
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/// <returns>The task running the processor process.</returns>
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private static Task RunProcessor(IReadChannelEnd<Action> inboundChannel, IReadChannelEnd<bool> initializedChannel)
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=> AutomationExtensions.RunTask(new
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{
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inboundChannel,
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initializedChannel
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}, async (self) =>
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{
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// Wait for initialization
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await self.initializedChannel.ReadAsync();
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while (true)
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{
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var action = await self.inboundChannel.ReadAsync();
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action();
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}
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});
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/// <summary>
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/// Adds a new task to the processor
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/// </summary>
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/// <param name="action">The action to execute</param>
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public void ExecuteAction(Action action)
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// Note: WriteNoWait() is used to avoid waiting for the action to be read,
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// as this would cause deadlocks if called from within the processor.
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// The buffer size should be sufficient to allow for a reasonable number of actions to be queued.
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=> m_inboundActionChannel.WriteNoWait(action);
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/// <summary>
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/// Signals the start of the processor
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/// </summary>
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public void SignalStart()
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=> m_initializedChannel.TryWrite(true);
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/// <summary>
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/// Disposes the object
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/// </summary>
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public void Dispose()
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{
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m_inboundActionChannel.Retire();
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m_initializedChannel.Retire();
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}
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}
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