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using System.Collections.Generic;

using UnityEngine.Events;

using UnityEngine;

namespace TexDrawLib

{

public class ObjectPool<T> where T : new ()

{

private readonly Stack<T> m_Stack = new Stack<T>();

#if UNITY_EDITOR

public int countAll { get; private set; }

public int countActive { get { return countAll - countInactive; } }

public int countInactive { get { return m_Stack.Count; } }

#endif

public T Get()

{

T element;

if (m_Stack.Count == 0)

{

element = new T();

#if UNITY_EDITOR

countAll++;

// Debug.LogFormat( "Pop New {0}, Total {1}", typeof(T).Name, countAll);

#endif

}

else

{

element = m_Stack.Pop();

}

return element;

}

public void Release(T element)

{

#if UNITY_EDITOR

if (m_Stack.Count > 0 && ReferenceEquals(m_Stack.Peek(), element))

Debug.LogError("Internal error. Trying to destroy object that is already released to pool.");

#endif

m_Stack.Push(element);

}

}

}