Class clsFdMap

co_epoll.cpp:59–114

#else
class clsFdMap // million of fd , 1024 * 1024 
{
private:
	static const int row_size = 1024;
	static const int col_size = 1024;

	void **m_pp[ 1024 ];
public:
	clsFdMap()
	{
		memset( m_pp,0,sizeof(m_pp) );
	}
	~clsFdMap()
	{
		for(int i=0;i<sizeof(m_pp)/sizeof(m_pp[0]);i++)
		{
			if( m_pp[i] ) 
			{
				free( m_pp[i] );
				m_pp[i] = NULL;
			}
		}
	}
	inline int clear( int fd )
	{
		set( fd,NULL );
		return 0;
	}
	inline int set( int fd,const void * ptr )
	{
		int idx = fd / row_size;
		if( idx < 0 || idx >= sizeof(m_pp)/sizeof(m_pp[0]) )
		{
			assert( __LINE__ == 0 );
			return -__LINE__;
		}
		if( !m_pp[ idx ] ) 
		{
			m_pp[ idx ] = (void**)calloc( 1,sizeof(void*) * col_size );
		}
		m_pp[ idx ][ fd % col_size ] = (void*)ptr;
		return 0;
	}
	inline void *get( int fd )
	{
		int idx = fd / row_size;
		if( idx < 0 || idx >= sizeof(m_pp)/sizeof(m_pp[0]) )
		{
			return NULL;
		}
		void **lp = m_pp[ idx ];
		if( !lp ) return NULL;

		return lp[ fd % col_size ];
	}
};

__thread clsFdMap *s_fd_map = NULL;