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#ifndef _ASURA_ENGINE_DATABUFFER_H_
#define _ASURA_ENGINE_DATABUFFER_H_

#include <cstdlib>

#include "../Scripting/Scripting.h"
#include "../Threads/Mutex.h"

namespace AsuraEngine
{
	namespace FileSystem
	{

		///
		/// ڴݵķװеʹData bufferװֱʹconst void*ͨresource managerȡ
		///
		class DataBuffer ASURA_FINAL
			: public AEScripting::Portable<DataBuffer>
		{
		public:

			LUAX_DECL_FACTORY(DataBuffer);

			DataBuffer(DataBuffer& src);
			DataBuffer(std::size_t capacity);
			DataBuffer(const void* bytes, std::size_t size);
			~DataBuffer();

			byte* GetData();
			size_t GetSize();
			size_t GetCapacity();

			///
			/// ޸
			///
			void Refactor(size_t capacity);

			///
			/// Դ˻
			///
			void Load(DataBuffer& db);
			void Load(const void* bytes, std::size_t size);

			///
			/// bytesӵȨcapacityΪsize
			///
			void Move(void* bytes, std::size_t size);

			///
			/// 
			///
			void Clear();

			void Lock();
			void Unlock();
			
		private:

			LUAX_DECL_METHOD(_New);
			LUAX_DECL_METHOD(_GetData);
			LUAX_DECL_METHOD(_GetSize);
			LUAX_DECL_METHOD(_GetCapacity);
			LUAX_DECL_METHOD(_Refactor);
			LUAX_DECL_METHOD(_Load);
			LUAX_DECL_METHOD(_Clear);

			///
			/// Buffer׵ַݵij
			///
			byte* m_Bytes;
			size_t m_Size;

			///
			/// Buffer
			///
			size_t m_Capacity;

			AEThreading::Mutex m_Mutex;

		};

	}
}

namespace AEFileSystem = AsuraEngine::FileSystem;

#endif