spine-runtimes/spine-cpp/spine-cpp/include/spine/Pool.h

/******************************************************************************
 * Spine Runtimes Software License v2.5
 *
 * Copyright (c) 2013-2016, Esoteric Software
 * All rights reserved.
 *
 * You are granted a perpetual, non-exclusive, non-sublicensable, and
 * non-transferable license to use, install, execute, and perform the Spine
 * Runtimes software and derivative works solely for personal or internal
 * use. Without the written permission of Esoteric Software (see Section 2 of
 * the Spine Software License Agreement), you may not (a) modify, translate,
 * adapt, or develop new applications using the Spine Runtimes or otherwise
 * create derivative works or improvements of the Spine Runtimes or (b) remove,
 * delete, alter, or obscure any trademarks or any copyright, trademark, patent,
 * or other intellectual property or proprietary rights notices on or in the
 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
 *
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#ifndef Spine_Pool_h
#define Spine_Pool_h

#include <spine/Extension.h>
#include <spine/Vector.h>
#include <spine/ContainerUtil.h>
#include <spine/SpineObject.h>

namespace Spine {
    template <typename T>
    class Pool : public SpineObject {
    public:
        Pool() {
        }
        
        ~Pool() {
            ContainerUtil::cleanUpVectorOfPointers(_objects);
        }
        
        T* obtain() {
            if (_objects.size() > 0) {
                T** object = &_objects[_objects.size() - 1];
                T* ret = *object;
                _objects.removeAt(_objects.size() - 1);
                
                return ret;
            }
            else {
                T* ret = new (__FILE__, __LINE__)  T();
                
                return ret;
            }
        }
        
        void free(T* object) {
            if (!_objects.contains(object)) {
                _objects.add(object);
            }
        }
        
    private:
        Vector<T*> _objects;
    };
}

#endif /* Spine_Pool_h */