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using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
namespace TMPro
{
internal class TMP_ObjectPool<T> where T : new()
{
private readonly Stack<T> m_Stack = new Stack<T>();
private readonly UnityAction<T> m_ActionOnGet;
private readonly UnityAction<T> m_ActionOnRelease;
public int countAll { get; private set; }
public int countActive { get { return countAll - countInactive; } }
public int countInactive { get { return m_Stack.Count; } }
public TMP_ObjectPool(UnityAction<T> actionOnGet, UnityAction<T> actionOnRelease)
{
m_ActionOnGet = actionOnGet;
m_ActionOnRelease = actionOnRelease;
}
public T Get()
{
T element;
if (m_Stack.Count == 0)
{
element = new T();
countAll++;
}
else
{
element = m_Stack.Pop();
}
if (m_ActionOnGet != null)
m_ActionOnGet(element);
return element;
}
public void Release(T element)
{
if (m_Stack.Count > 0 && ReferenceEquals(m_Stack.Peek(), element))
Debug.LogError("Internal error. Trying to destroy object that is already released to pool.");
if (m_ActionOnRelease != null)
m_ActionOnRelease(element);
m_Stack.Push(element);
}
}
}