acl/lib_acl_cpp/include/acl_cpp/stdlib/dbuf_pool.hpp

#pragma once
#include "../acl_cpp_define.hpp"
#include "noncopyable.hpp"
#include <vector>

struct ACL_DBUF_POOL;

namespace acl
{

/**
 * <EFBFBD>Ự<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>࣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>亯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>
 * <EFBFBD>ᱻһ<EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD><EFBFBD>ͷţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҪƵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD>С<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ã<EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD>װ<EFBFBD><EFBFBD> lib_acl <EFBFBD>е<EFBFBD> ACL_DBUF_POOL <EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */

class ACL_CPP_API dbuf_pool : public noncopyable
{
public:
	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>붯̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	dbuf_pool();

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> destroy
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	void destroy();

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> new/delete <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD>
	 * <EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> malloc/free <EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>
	 * @param size {size_t} <EFBFBD>ɱ<EFBFBD><EFBFBD>봫<EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD>ȴ<EFBFBD>С
	 * @param nblock {size_t} <EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>飨4096<EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD>
	 */
	void *operator new(size_t size, size_t nblock = 2);

#if defined(_WIN32) || defined(_WIN64)
	void operator delete(void* ptr, size_t);
#endif
	void operator delete(void* ptr);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ص<EFBFBD>״̬<EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>ʹ<EFBFBD>ø<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD>
	 * @param reserve {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ > 0<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ᵽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD>
	 *  <EFBFBD>ô<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ڸ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>С
	 * @return {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>򷵻<EFBFBD> false
	 */
	bool dbuf_reset(size_t reserve = 0);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ<EFBFBD>
	 * @param len {size_t} <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ泤<EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>Ƚ<EFBFBD>Сʱ(С<EFBFBD>ڹ<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD>
	 *  <EFBFBD>е<EFBFBD> block_size)ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD>
	 *  <EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ϴ<EFBFBD>ʱ<EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD> malloc <EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><EFBFBD><EFBFBD>
	 * @return {void*} <EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ
	 */
	void* dbuf_alloc(size_t len);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڴ沢<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param len {size_t} <EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ泤<EFBFBD><EFBFBD>
	 * @return {void*} <EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ
	 */
	void* dbuf_calloc(size_t len);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><EFBFBD>ڴ沢<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> strdup
	 * @param s {const char*} Դ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>
	 * @return {char*} <EFBFBD>¸<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
	 */
	char* dbuf_strdup(const char* s);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><EFBFBD>ڴ沢<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> strdup
	 * @param s {const char*} Դ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>
	 * @param len {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󳤶<EFBFBD>
	 * @return {char*} <EFBFBD>¸<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ
	 */
	char* dbuf_strndup(const char* s, size_t len);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ沢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD>и<EFBFBD><EFBFBD><EFBFBD>
	 * @param addr {const void*} Դ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ
	 * @param len {size_t} Դ<EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD><EFBFBD><EFBFBD>
	 * @return {void*} <EFBFBD>¸<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ַ
	 */
	void* dbuf_memdup(const void* addr, size_t len);

	/**
	 * <EFBFBD>黹<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>
	 * @param addr {const void*} <EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ
	 * @return {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŶ<EFBFBD><EFBFBD>Σ<EFBFBD><EFBFBD>򷵻<EFBFBD> false
	 */
	bool dbuf_free(const void* addr);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD>ε<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⵱<EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_reset ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD>ͷŵ<EFBFBD>
	 * @param addr {const void*} <EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ
	 * @return {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD>䣬<EFBFBD>򷵻<EFBFBD> false
	 */
	bool dbuf_keep(const void* addr);

	/**
	 * ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD>ε<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD> dbuf_reset ʱ<EFBFBD><EFBFBD><EFBFBD>ͷŵ<EFBFBD>
	 * @param addr {const void*} <EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ
	 * @return {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD>䣬<EFBFBD>򷵻<EFBFBD> false
	 */
	bool dbuf_unkeep(const void* addr);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD> ACL_DBUF_POOL <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD> C <EFBFBD>ӿڵ<EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD>
	 * @return {ACL_DBUF_POOL*}
	 */
	ACL_DBUF_POOL *get_dbuf()
	{
		return pool_;
	}

private:
	ACL_DBUF_POOL* pool_;
	size_t mysize_;

public:
	~dbuf_pool();
};

/**
 * sample:
 *  void test()
 *  {
 *      acl::dbuf_pool* dbuf = new acl::dbuf_pool;
 *      for (int i = 0; i < 1000; i++)
 *      {
 *          char* ptr = dbuf->dbuf_strdup("hello world!");
 *          printf("%s\r\n", p);
 *      }
 *      dbuf->destroy();
 *
 *      // <20><><EFBFBD><EFBFBD> dbuf <20><><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><DAB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
 *      dbuf = new(8) acl::dbuf_pool;
 *      for (int i = 0; i < 1000; i++)
 *      {
 *          ptr = dbuf->dbuf_strdup("hello world!");
 *          printf("%s\r\n", p);
 *      }
 *
 *	// <20><><EFBFBD><EFBFBD> dbuf <20><><EFBFBD><EFBFBD>
 *      dbuf->destroy();
 *  }
 *
 */
//////////////////////////////////////////////////////////////////////////////

class dbuf_guard;

/**
 * <EFBFBD>ڻỰ<EFBFBD>ڴ<EFBFBD><EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 */
class ACL_CPP_API dbuf_obj : public noncopyable
{
public:
	/**
	 * <EFBFBD><EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD>
	 * @param guard {dbuf_guard*} <EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᱻ
	 *  dbuf_guard <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳһ<EFBFBD><EFBFBD><EFBFBD>٣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ӧ
	 *  <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard::push_back <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	dbuf_obj(dbuf_guard* guard = NULL);

	virtual ~dbuf_obj() {}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>øö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD><EFBFBD>
	 * @return {int} <EFBFBD><EFBFBD><EFBFBD>ظö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  <EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>б<EFBFBD> dbuf_guard <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>򷵻<EFBFBD> -1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>п<EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>й¶
	 */
	int pos() const
	{
		return pos_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>ع<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @return {dbuf_guard*}
	 */
	dbuf_guard* get_guard() const
	{
		return guard_;
	}

private:
	friend class dbuf_guard;

	// <20><>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <20><><EFBFBD><EFBFBD>
	dbuf_guard* guard_;

	// <20>ñ<EFBFBD><C3B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <20><><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><C3A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӱ<EFBFBD>ȫ<EFBFBD><C8AB>
	int nrefer_;

	// <20>ö<EFBFBD><C3B6><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <20><><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB>
	int pos_;
};

/**
 * <EFBFBD>Ự<EFBFBD>ڴ<EFBFBD><EFBFBD>ع<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD>󣬵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷš<EFBFBD>
 */
class ACL_CPP_API dbuf_guard : public noncopyable
{
public:
	/**
	 * <EFBFBD><EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD>
	 * @param dbuf {dbuf_pool*} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD>ʱ<EFBFBD><EFBFBD>dbuf <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard
	 *  <EFBFBD>ӹܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD>򱾹<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param capacity {size_t} <EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> objs_ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	dbuf_guard(dbuf_pool* dbuf, size_t capacity = 500);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD>
	 * @param nblock {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>(4096)<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD>
	 * @param capacity {size_t} <EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> objs_ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	dbuf_guard(size_t nblock = 2, size_t capacity = 500);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	~dbuf_guard();

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_reset
	 * @param reserve {size_t}
	 * @return {bool}
	 */
	bool dbuf_reset(size_t reserve = 0);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_alloc
	 * @param len {size_t}
	 * @return {void*}
	 */
	void* dbuf_alloc(size_t len)
	{
		return dbuf_->dbuf_alloc(len);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_calloc
	 * @param len {size_t}
	 * @return {void*}
	 */
	void* dbuf_calloc(size_t len)
	{
		return dbuf_->dbuf_calloc(len);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_strdup
	 * @param s {const char*}
	 * @return {char*}
	 */
	char* dbuf_strdup(const char* s)
	{
		return dbuf_->dbuf_strdup(s);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_strndup
	 * @param s {const char*}
	 * @param len {size_t}
	 * @return {char*}
	 */
	char* dbuf_strndup(const char* s, size_t len)
	{
		return dbuf_->dbuf_strndup(s, len);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_memdup
	 * @param addr {const void*}
	 * @param len {size_t}
	 * @return {void*}
	 */
	void* dbuf_memdup(const void* addr, size_t len)
	{
		return dbuf_->dbuf_memdup(addr, len);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_free
	 * @param addr {const void*}
	 * @return {bool}
	 */
	bool dbuf_free(const void* addr)
	{
		return dbuf_->dbuf_free(addr);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_keep
	 * @param addr {const void*}
	 * @return {bool}
	 */
	bool dbuf_keep(const void* addr)
	{
		return dbuf_->dbuf_keep(addr);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool::dbuf_unkeep
	 * @param addr {const void*}
	 * @return {bool}
	 */
	bool dbuf_unkeep(const void* addr)
	{
		return dbuf_->dbuf_unkeep(addr);
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @return {acl::dbuf_pool&}
	 */
	acl::dbuf_pool& get_dbuf() const
	{
		return *dbuf_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_pool <EFBFBD>Ϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_obj <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󽻸<EFBFBD>
	 * dbuf_guard <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͳһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD> dbuf_obj <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ
	 * ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_guard <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>򽫻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><EFBFBD>ͷ<EFBFBD>
	 * @param obj {dbuf_obj*}
	 * @return {int} <EFBFBD><EFBFBD><EFBFBD><EFBFBD> obj <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> dbuf_obj <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD>ã<EFBFBD>
	 *  dbuf_guard <EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD> dbuf_obj <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӻ<EFBFBD><EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  <EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD> dbuf_obj <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD> dbuf_guard <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>
	 */
	int push_back(dbuf_obj* obj);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @return {size_t}
	 */
	size_t size() const
	{
		return size_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>±<EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>
	 * @param pos {size_t} ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>ӦԽ<EFBFBD><EFBFBD>
	 * @return {dbuf_obj*} <EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL
	 */
	dbuf_obj* operator[](size_t pos) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>±<EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>
	 * @param pos {size_t} ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD>ӦԽ<EFBFBD><EFBFBD>
	 * @return {dbuf_obj*} <EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL
	 */
	dbuf_obj* get(size_t pos) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD> objs_ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD>ȱʡֵΪ 100
	 * @param incr {size_t}
	 */
	void set_increment(size_t incr);

public:
	template <typename T>
	T* create()
	{
		T* t = new (dbuf_alloc(sizeof(T))) T();
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1>
	T* create(P1 p)
	{
		T* t = new (dbuf_alloc(sizeof(T))) T(p);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2>
	T* create(P1 p1, P2 p2)
	{
		T* t = new (dbuf_alloc(sizeof(T))) T(p1, p2);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3>
	T* create(P1 p1, P2 p2, P3 p3)
	{
		T* t = new (dbuf_alloc(sizeof(T))) T(p1, p2, p3);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4)
	{
		T* t = new (dbuf_alloc(sizeof(T))) T(p1, p2, p3, p4);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4, typename P5>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5)
	{
		T* t = new (dbuf_alloc(sizeof(T))) T(p1, p2, p3, p4, p5);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4, typename P5, typename P6>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6)
	{
		T* t = new (dbuf_alloc(sizeof(T))) T(p1, p2, p3, p4, p5, p6);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4, typename P5, typename P6, typename P7>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7)
	{
		T* t = new (dbuf_alloc(sizeof(T)))
			T(p1, p2, p3, p4, p5, p6, p7);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4, typename P5, typename P6, typename P7,
		 typename P8>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7, P8 p8)
	{
		T* t = new (dbuf_alloc(sizeof(T)))
			T(p1, p2, p3, p4, p5, p6, p7, p8);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4, typename P5, typename P6, typename P7,
		 typename P8,typename P9>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7,
		P8 p8, P9 p9)
	{
		T* t = new (dbuf_alloc(sizeof(T)))
			T(p1, p2, p3, p4, p5, p6, p7, p8, p9);
		(void) push_back(t);
		return t;
	}

	template <typename T, typename P1, typename P2, typename P3,
		 typename P4, typename P5, typename P6, typename P7,
		 typename P8, typename P9, typename P10>
	T* create(P1 p1, P2 p2, P3 p3, P4 p4, P5 p5, P6 p6, P7 p7,
		P8 p8, P9 p9, P10 p10)
	{
		T* t = new (dbuf_alloc(sizeof(T)))
			T(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10);
		(void) push_back(t);
		return t;
	}

private:
	size_t nblock_;			// <20>ڲ<EFBFBD><DAB2>Խ<EFBFBD> dbuf_pool <20>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD>ĵ<EFBFBD>λ<EFBFBD><CEBB><EFBFBD><EFBFBD>
	size_t incr_;			// <20><><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD> dbuf_objs_link ʱ<><CAB1>
					// capacity <20><>С
	dbuf_pool* dbuf_;		// <20>ڴ<EFBFBD><DAB4>ض<EFBFBD><D8B6><EFBFBD>

	// <20>˴<EFBFBD>֮<EFBFBD><D6AE><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD>ʵ<EFBFBD>ֵ<EFBFBD> dbuf_obj <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󣬶<EFBFBD>û<EFBFBD><C3BB>ʹ<EFBFBD><CAB9> std::vector<6F><72>
	// һ<><D2BB><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><D2B2> dbuf_pool <20>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD>ϴ<EFBFBD><CFB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD><D4B1><EFBFBD>
	// std::vector <20>ڲ<EFBFBD><DAB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD>ڴ治<DAB4>ɿ<EFBFBD><C9BF><EFBFBD>

	struct dbuf_objs_link
	{
		dbuf_obj** objs;	// <20>洢 dbuf_obj <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		size_t size;		// <20>洢<EFBFBD><E6B4A2> objs <20>еĶ<D0B5><C4B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		size_t capacity;	// objs <20><><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD>С

		struct dbuf_objs_link* next;
	};

	dbuf_objs_link  head_;
	dbuf_objs_link* curr_;
	size_t size_;

	void init(size_t capacity);

	// <20><><EFBFBD><EFBFBD> objs_ <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀռ<C4BF>
	void extend_objs();
};

/**
 * sample1:
 * // <20>̳<EFBFBD> acl::dbuf_obj <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * class myobj1 : public acl::dbuf_obj
 * {
 * public:
 * 	// <20><> guard <20><><EFBFBD>󴫵ݸ<F3B4ABB5><DDB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󣬻<EFBFBD><F3A3ACBB>ཫ<EFBFBD><E0BDAB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> guard <20>Ķ<EFBFBD><C4B6>󼯺<EFBFBD><F3BCAFBA><EFBFBD>
 * 	myobj1(acl::dbuf_guard* guard) : dbuf_obj(guard) {}
 *
 * 	void doit()
 * 	{
 * 		printf("hello world!\r\n");
 * 	}
 *
 * private:
 * 	~myobj1() {}
 * };
 *
 * void test()
 * {
 * 	acl::dbuf_guard dbuf;
 *
 *	// <20><> dbuf_guard <20><><EFBFBD><EFBFBD><EFBFBD>ϴ<EFBFBD><CFB4><EFBFBD><EFBFBD><EFBFBD>̬ 100 <20><> myobj <20><><EFBFBD><EFBFBD>
 * 	for (int i = 0; i < 100; i++)
 * 	{
 * 		// <20><> guard <20><><EFBFBD><EFBFBD><EFBFBD>ϴ<EFBFBD><CFB4><EFBFBD><EFBFBD><EFBFBD>̬ myobj <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҽ<EFBFBD> guard <20><>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * 		myobj* obj = new (dbuf.dbuf_alloc(sizeof(myobj))) myobj(&dbuf);
 * 		obj->doit();
 * 	}
 *
 *	// <20><> dbuf <20><><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洴<EFBFBD><E6B4B4><EFBFBD>Ķ<EFBFBD>̬<EFBFBD><CCAC><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD>
 * }
 *
 * // sample2
 * class myobj2 : public acl::dbuf_obj
 * {
 * public:
 * 	myobj2() {}
 *
 * 	void doit()
 * 	{
 * 		printf("hello world\r\n");
 * 	}
 *
 * private:
 * 	~myobj2() {}
 * };
 *
 * void test2()
 * {
 * 	acl::dbuf_guard dbuf;
 *
 * 	for (int i = 0; i < 100; i++)
 * 	{
 * 		myobj2* obj = dbuf.create<myobj2>();
 * 		obj->doit();
 * 	}
 * }
 *
 * // sample3
 * class myobj2 : public acl::dbuf_obj
 * {
 * public:
 * 	myobj2(int i) : i_(i) {}
 *
 * 	void doit()
 * 	{
 * 		printf("hello world, i: %d\r\n", i_);
 * 	}
 *
 * private:
 * 	~myobj2() {}
 *
 * private:
 *	int i_;
 * };
 *
 * void test2()
 * {
 * 	acl::dbuf_guard dbuf;
 *
 * 	for (int i = 0; i < 100; i++)
 * 	{
 * 		myobj2* obj = dbuf.create<myobj2>(i);
 * 		obj->doit();
 * 	}
 * }
 */
} // namespace acl