UniTask/Assets/UniRx.Async/Triggers/AsyncAwakeTrigger.cs

55 lines
1.4 KiB
C#

#if CSHARP_7_OR_LATER || (UNITY_2018_3_OR_NEWER && (NET_STANDARD_2_0 || NET_4_6))
#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
using UnityEngine;
namespace UniRx.Async.Triggers
{
[DisallowMultipleComponent]
public class AsyncAwakeTrigger : MonoBehaviour
{
bool called = false;
UniTaskCompletionSource promise;
void Awake()
{
called = true;
promise?.TrySetResult();
}
public UniTask AwakeAsync()
{
if (called) return UniTask.CompletedTask;
PlayerLoopHelper.AddAction(PlayerLoopTiming.Update, new AwakeMonitor(this));
return new UniTask(promise ?? (promise = new UniTaskCompletionSource()));
}
private void OnDestroy()
{
promise?.TrySetCanceled();
}
class AwakeMonitor : IPlayerLoopItem
{
readonly AsyncAwakeTrigger trigger;
public AwakeMonitor(AsyncAwakeTrigger trigger)
{
this.trigger = trigger;
}
public bool MoveNext()
{
if (trigger.called) return false;
if (trigger == null)
{
trigger.OnDestroy();
return false;
}
return true;
}
}
}
}
#endif