Win平台，文件句柄类型的相互转换

Win平台，文件句柄类型的相互转换

已知：

CreateFile返回的是HANDLE，

fopen返回的是FILE *,

_open返回的是个int,

 

转换：

1、FILE * => int

Gets the file descriptor associated with a stream.

int _fileno( 
   FILE *stream 
);

2、int => HANDLE

Returns operating-system file handle associated with existing low-level file descriptor.

long _get_osfhandle( 
   int fd 
);

3、HANDLE => int

Associates a C run-time file descriptor with an existing operating-system file handle.

int _open_osfhandle (
   intptr_t osfhandle,
      int flags 
);

4、FILE * => int

应该就是FILE结构中的_file字段。