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79
src/Ryujinx.Common/Logging/Targets/AsyncLogTargetWrapper.cs
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79
src/Ryujinx.Common/Logging/Targets/AsyncLogTargetWrapper.cs
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using System;
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using System.Collections.Concurrent;
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using System.Threading;
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namespace Ryujinx.Common.Logging
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{
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public enum AsyncLogTargetOverflowAction
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{
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/// <summary>
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/// Block until there's more room in the queue
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/// </summary>
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Block = 0,
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/// <summary>
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/// Discard the overflowing item
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/// </summary>
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Discard = 1
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}
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public class AsyncLogTargetWrapper : ILogTarget
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{
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private ILogTarget _target;
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private Thread _messageThread;
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private BlockingCollection<LogEventArgs> _messageQueue;
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private readonly int _overflowTimeout;
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string ILogTarget.Name { get => _target.Name; }
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public AsyncLogTargetWrapper(ILogTarget target)
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: this(target, -1, AsyncLogTargetOverflowAction.Block)
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{ }
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public AsyncLogTargetWrapper(ILogTarget target, int queueLimit, AsyncLogTargetOverflowAction overflowAction)
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{
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_target = target;
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_messageQueue = new BlockingCollection<LogEventArgs>(queueLimit);
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_overflowTimeout = overflowAction == AsyncLogTargetOverflowAction.Block ? -1 : 0;
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_messageThread = new Thread(() => {
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while (!_messageQueue.IsCompleted)
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{
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try
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{
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_target.Log(this, _messageQueue.Take());
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}
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catch (InvalidOperationException)
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{
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// IOE means that Take() was called on a completed collection.
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// Some other thread can call CompleteAdding after we pass the
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// IsCompleted check but before we call Take.
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// We can simply catch the exception since the loop will break
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// on the next iteration.
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}
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}
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});
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_messageThread.Name = "Logger.MessageThread";
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_messageThread.IsBackground = true;
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_messageThread.Start();
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}
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public void Log(object sender, LogEventArgs e)
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{
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if (!_messageQueue.IsAddingCompleted)
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{
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_messageQueue.TryAdd(e, _overflowTimeout);
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}
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}
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public void Dispose()
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{
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_messageQueue.CompleteAdding();
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_messageThread.Join();
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}
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}
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}
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