tanyyt / GDTask

Async/await functionality in Godot ✅

GDTask ✅

NOTE:

This branch is for the Godot 4.x version of the addon. You can download the Godot 3.x version from the 3.x branch.

Adds async/await features in Godot for easier async coding. Based on code from Cysharp's UniTask library for Unity.

using Fractural.Tasks;

public Test : Node 
{
	[Signal]
	public delegate void MySignalHandler(int number, bool boolean);
	
	public override _Ready() 
	{
		// Running a task from a non-async method.
		Run().Forget();
	}

	public async GDTaskVoid Run() 
	{
		await GDTask.DelayFrame(100);

		// Waiting some amount of time
		// Note that these delays are paused when the game is paused
		await GDTask.Delay(TimeSpan.FromSeconds(10));
		await GDTask.Delay(TimeSpan.FromSeconds(10), PlayerLoopTiming.Process);
		await GDTask.Delay(TimeSpan.FromSeconds(10), PlayerLoopTiming.PhysicsProcess);
		// Waiting some amount of milliseconds
		await GDTask.Delay(1000);
		// Waiting some amount of milliseconds, regardless of whether the game is paused
		await GDTask.Delay(TimeSpan.FromSeconds(10), PlayerLoopTiming.PauseProcess);
		await GDTask.Delay(TimeSpan.FromSeconds(10), PlayerLoopTiming.PausePhysicsProcess);

		// Awaiting for a signal
		WaitAndEmitMySignal(TimeSpan.FromSeconds(2)).Forget();
		var signalResults = await GDTask.ToSignal(this, nameof(MySignal));
		// signalResults = [10, true]

		// Cancellable awaiting a signal
		var cts = new CancellationTokenSource();
		WaitAndEmitMySignal(TimeSpan.FromSeconds(2)).Forget();
		WaitAndCancelToken(TimeSpan.FromSeconds(1), cts).Forget();
		try 
		{
			var signalResults = await GDTask.ToSignal(this, nameof(MySignal), cts.Token);
		}
		catch (OperationCanceledException _)
		{
			GD.Print("Awaiting MySignal cancelled!");
		}

		// Waiting a single frame
		await GDTask.Yield();
		await GDTask.NextFrame();
		await GDTask.WaitForEndOfFrame();

		// Waiting for specific lifetime call
		await GDTask.WaitForPhysicsProcess();

		// Cancellation of a GDTask
		var cts = new CancellationTokenSource();
		CancellableReallyLongTask(cts.Token).Forget();
		await GDTask.Delay(TimeSpan.FromSeconds(3));
		cts.Cancel();

		// Returning a value from a GDTask
		string result = await RunWithResult();
		return result + " with additional text";
	}

	public async GDTask<string> RunWithResult()
	{
		await GDTask.Delay(TimeSpan.FromSeconds(3));
		return "A result string";
	}

	public async GDTaskVoid ReallyLongTask(CancellationToken cancellationToken)
	{
		GD.Print("Starting long task.");
		await GDTask.Delay(TimeSpan.FromSeconds(1000000), cancellationToken: cancellationToken);
		GD.Print("Finished long task.");
	}
	
	public async GDTaskVoid WaitAndEmitMySignal(TimeSpan delay)
	{
		await GDTask.Delay(delay);
		EmitSignal(nameof(MySignal), 10, true);
	}

	public async GDTaskVoid WaitAndCancelToken(TimeSpan delay, CancellationTokenSource cts)
	{
		await GDTask.Delay(delay);
		cts.Cancel();
	}
}

Installation

Manual

1. Download the repository
2. Move the addons/GDTask folder into addons/GDTask

Git Submodules

1. Make sure your project has a git repo initialized
2. Run

git submodule add -b release https://github.com/fractural/GDTask.git addons/GDTask

3. Add addons/GDTask/Autoload/GDTaskPlayerLoopAutoload as an autoload