UnityQueuedTaskManager.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System;


public class QueuedTask : Singleton<QueuedTask> {

	const int MaxProcessCount = 2;

	public class Task {
		public Task (Action action) {
			this.action = action;
			this.isDone = false;
		}
		public Action action;
		public bool isDone;
	}

	public static Queue<Task> taskQueue = new Queue<Task> (100);

	public static void AddTask ( Task task ) {
		task.isDone = false;
		taskQueue.Enqueue(task);
	}

	void Update () {
		for (int i=0;i<MaxProcessCount;i++) {
			if (taskQueue.Count==0) return;
			Task t = taskQueue.Peek();
			if (t!=null) {
				t.action();
				t.isDone = true;
				taskQueue.Dequeue();
			}
		}
	}

}

//// Usage Example
//public class TestCCCC : MonoBehaviour {
//
//	QueuedTask.Task task;
//
//	void Start() {
//		task = new QueuedTask.Task (sb);
//	}
//
//	void sb () {
//		//some heavy work
//	}
//
//	void Update() {
//		QueuedTask.AddTask(task);
//		if (task.isDone == false ) return;
//		else {
//			//continue the logic
//			//...
//		}
//	}
//}