xiaoxiang781216 commented on PR #10602: URL: https://github.com/apache/nuttx/pull/10602#issuecomment-1720389659
> > This case isn't suitable for stdio functions. How can you pass FILE * from one task/process to other task/process in kernel mode? So it's impossible to call the callback function cross the address space boundary since FILE* return from fopencookie can only be used by the caller's task/process and is always invalid and impossible to pass FILE* to another task/process at the first place. > > I don't see the relevance of the FILE*. I was more concerned at the io_funcs and cookie. But looking at the prototype, it seems impossible that the io_funcs could like in a different address space. from the caller of fopencookie(). Yes, this is the key point: both io_funcs and cookie can only be used in the same proccess(address space), which simplify the thing a lot if the implementation can avoid the involve any kernel space stuff. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
