All I can find online talking about await in async is teaching me how to "wait for a certain period of time", which is not what I want.

I want it to wait until a certain condition is met.

Just lile

yield return new WaitUntil(()=>conditionIsMet);

in Coroutine.

I want to do something like

await Task.WaitUntil(()=>conditionIsMet);

Is such thing possible?

Could somebody please be so kind and help me out?

Thank you very much for your help.

CodePudding user response：

Wouldn't this basically simply be something like

public static class TaskUtils
{
    public static Task WaitUntil(Func<bool> predicate)
    {
        while (!predicate()) { }
    }
}

though for the love of your CPU I would actually rather give your task certain sleep intervals like

public static class TaskUtils
{
    public static async Task WaitUntil(Func<bool> predicate, int sleep = 50)
    {
        while (!predicate())
        {
            await Task.Delay(sleep);
        }
    }
}

and now you could e.g. use something like

public class Example : MonoBehaviour
{
    public bool condition;

    private void Start()
    {
        Task.Run(async ()=> await YourTask());
    }

    public async Task YourTask()
    {
        await TaskUtils.WaitUntil(IsConditionTrue);
        // or as lambda
        //await TaskUtils.WaitUntil(() => condition);

        Debug.Log("Hello!");
    }

    private bool IsConditionTrue()
    {
        return condition;
    }
}

CodePudding user response：

you can create your own ConsitionCheker method, and use it in your MainFunction that gets a boolian which awaits for your condition result

 public async Task<bool> CheckCondition()
        {
            While(true){
               // check the condition
               if(mycondition is true)
                  break;
            }
            return true;
        }



 public void Do(bool consitionResult)
    {
        if(consitionResult){
        // codes
        }
    }

usage :

public  async void Test()
        {
            // waiting for condition met
            // pass the condition result
            Do(await CheckCondition());
        }