rimworld-animation-studio/Assets/Scripts/Singleton.cs
2022-09-15 00:17:44 -05:00

52 lines
No EOL
1.4 KiB
C#

using System;
using System.Collections.Generic;
using UnityEngine;
namespace RimWorldAnimationStudio
{
public class Singleton<T> : MonoBehaviour where T : MonoBehaviour
{
private static bool shuttingDown = false;
private static object threadLock = new object();
private static T instance;
public static T Instance
{
get
{
if (shuttingDown)
{
Debug.LogWarning("[Singleton] Instance '" + typeof(T) + "' already destroyed. Returning null.");
return null;
}
lock (threadLock)
{
if (instance == null)
{
instance = (T)FindObjectOfType(typeof(T));
if (instance == null)
{
var singletonObject = new GameObject();
instance = singletonObject.AddComponent<T>();
singletonObject.name = typeof(T).ToString() + " (Singleton)";
}
}
return instance;
}
}
}
private void Awake()
{
DontDestroyOnLoad(this.gameObject);
}
private void OnDestroy()
{
shuttingDown = true;
}
}
}