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Source/Engine/Core/ObjectsRemovalService.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Object.h"
+
+/// <summary>
+/// Removing old objects service. Your friendly garbage collector!
+/// </summary>
+class FLAXENGINE_API ObjectsRemovalService
+{
+public:
+
+    /// <summary>
+    /// Determines whether object has been registered in the pool for the removing.
+    /// </summary>
+    /// <param name="obj">The object.</param>
+    /// <returns>True if object has been registered in the pool for the removing, otherwise false.</returns>
+    static bool IsInPool(RemovableObject* obj);
+
+    /// <summary>
+    /// Determines whether any object has been registered to be removed from pool (requests are flushed on Flush call).
+    /// </summary>
+    /// <returns>True if any object has been registered to be removed, otherwise false.</returns>
+    static bool HasNewItemsForFlush();
+
+    /// <summary>
+    /// Removes the specified object from the dead pool (clears the reference to it).
+    /// </summary>
+    /// <param name="obj">The object.</param>
+    static void Dereference(RemovableObject* obj);
+
+    /// <summary>
+    /// Adds the specified object to the dead pool.
+    /// </summary>
+    /// <param name="obj">The object.</param>
+    /// <param name="timeToLive">The time to live (in seconds).</param>
+    /// <param name="useGameTime">True if unscaled game time for the object life timeout, otherwise false to use absolute time.</param>
+    static void Add(RemovableObject* obj, float timeToLive = 1.0f, bool useGameTime = false);
+
+    /// <summary>
+    /// Flushes the objects pool removing objects marked to remove now (with negative or zero time to live).
+    /// </summary>
+    FORCE_INLINE static void Flush()
+    {
+        Flush(0, 0);
+    }
+
+    /// <summary>
+    /// Flushes the objects pool.
+    /// </summary>
+    /// <param name="dt">The delta time (in seconds).</param>
+    /// <param name="gameDelta">The game update delta time (in seconds).</param>
+    static void Flush(float dt, float gameDelta);
+
+    /// <summary>
+    /// Forces the flush the all objects from the pool.
+    /// </summary>
+    FORCE_INLINE static void ForceFlush()
+    {
+        Flush(1000, 1000);
+    }
+};