51 lines
1.8 KiB
C#
51 lines
1.8 KiB
C#
using UnityEngine;
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namespace RTG
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{
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public class MonoSingleton<T> : MonoBehaviour where T : MonoBehaviour
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{
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private static object _singletonLock = new object();
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private static T _instance;
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/// <summary>
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/// Returns the singleton instance.
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/// </summary>
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/// <remarks>
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/// If no instance of the required MonoBehaviour type exists in the scene, the property
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/// will return null. Null is also returned if more than one instance is found.
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/// </remarks>
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public static T Get
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{
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get
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{
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// Is the instance available?
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if (_instance == null)
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{
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// Apply lock on our sync object
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lock (_singletonLock)
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{
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// Retrieve the instance from the scene.
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T[] singletonInstances = FindObjectsOfType(typeof(T)) as T[];
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// No instance? Return null.
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if (singletonInstances.Length == 0) return null;
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// More than one singleton?
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if (singletonInstances.Length > 1)
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{
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// Log warning message if running in editor mode and then return null
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if (Application.isEditor) Debug.LogWarning("MonoSingleton<T>.Instance: Only 1 singleton instance can exist in the scene. Null will be returned.");
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return null;
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}
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// Only one instance was found, so we can store it
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_instance = singletonInstances[0];
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}
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}
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return _instance;
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}
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}
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}
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}
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