axmol/cocos/base/CCAutoreleasePool.h

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/
#ifndef __AUTORELEASEPOOL_H__
#define __AUTORELEASEPOOL_H__

#include <stack>
#include <vector>
#include <string>
#include "base/CCRef.h"

NS_CC_BEGIN

/**
 * @addtogroup base_nodes
 * @{
 */

class CC_DLL AutoreleasePool
{
public:
    /**
     * @warn Don't create an auto release pool in heap, create it in stack.
     * @js NA
     * @lua NA
     */
    AutoreleasePool();
    
    /**
     * Create an autorelease pool with specific name. This name is useful for debugging.
     */
    AutoreleasePool(const std::string &name);
    
    /**
     * @js NA
     * @lua NA
     */
    ~AutoreleasePool();

    /**
     * Add a given object to this pool.
     *
     * The same object may be added several times to the same pool; When the
     * pool is destructed, the object's Ref::release() method will be called
     * for each time it was added.
     *
     * @param object    The object to add to the pool.
     * @js NA
     * @lua NA
     */
    void addObject(Ref *object);

    /**
     * Clear the autorelease pool.
     *
     * Ref::release() will be called for each time the managed object is
     * added to the pool.
     * @js NA
     * @lua NA
     */
    void clear();
    
#if defined(COCOS2D_DEBUG) && (COCOS2D_DEBUG > 0)
    /**
     * Whether the pool is doing `clear` operation.
     */
    bool isClearing() const { return _isClearing; };
#endif
    
    /**
     * Checks whether the pool contains the specified object.
     */
    bool contains(Ref* object) const;

    /**
     * Dump the objects that are put into autorelease pool. It is used for debugging.
     *
     * The result will look like:
     * Object pointer address     object id     reference count
     *
     */
    void dump();
    
private:
    /**
     * The underlying array of object managed by the pool.
     *
     * Although Array retains the object once when an object is added, proper
     * Ref::release() is called outside the array to make sure that the pool
     * does not affect the managed object's reference count. So an object can
     * be destructed properly by calling Ref::release() even if the object
     * is in the pool.
     */
    std::vector<Ref*> _managedObjectArray;
    std::string _name;
    
#if defined(COCOS2D_DEBUG) && (COCOS2D_DEBUG > 0)
    /**
     *  The flag for checking whether the pool is doing `clear` operation.
     */
    bool _isClearing;
#endif
};

class CC_DLL PoolManager
{
public:
    /**
     * @js NA
     * @lua NA
     */
    CC_DEPRECATED_ATTRIBUTE static PoolManager* sharedPoolManager() { return getInstance(); }
    static PoolManager* getInstance();
    
    /**
     * @js NA
     * @lua NA
     */
    CC_DEPRECATED_ATTRIBUTE static void purgePoolManager() { destroyInstance(); }
    static void destroyInstance();
    
    /**
     * Get current auto release pool, there is at least one auto release pool that created by engine.
     * You can create your own auto release pool at demand, which will be put into auto releae pool stack.
     */
    AutoreleasePool *getCurrentPool() const;

    bool isObjectInPools(Ref* obj) const;

    /**
     * @js NA
     * @lua NA
     */
    friend class AutoreleasePool;
    
private:
    PoolManager();
    ~PoolManager();
    
    void push(AutoreleasePool *pool);
    void pop();
    
    static PoolManager* s_singleInstance;
    
    std::deque<AutoreleasePool*> _releasePoolStack;
    AutoreleasePool *_curReleasePool;
};

// end of base_nodes group
/// @}

NS_CC_END

#endif //__AUTORELEASEPOOL_H__