1 / 6

CS 241 Section (04/12/12)

CS 241 Section (04/12/12). MP7. Any questions?. select(). int select( int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict errorfds, struct timeval *restrict timeout );. select(). Return Value: Number of fds ready to be acted upon.

mac
Download Presentation

CS 241 Section (04/12/12)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CS 241 Section(04/12/12)

  2. MP7 • Any questions?

  3. select() • int select( int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict errorfds, struct timeval *restrict timeout);

  4. select() Return Value: Number of fds ready to be acted upon. • int select( int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict errorfds, struct timeval *restrict timeout);

  5. select() Return Value: Number of fds ready to be acted upon. • int select( int nfds, fd_set *restrict readfds, fd_set *restrict writefds, fd_set *restrict errorfds, struct timeval *restrict timeout); nfds: max(fds) + 1 or FD_SETSIZE

  6. Coding • In ds10, we’ll look at using: • pipe() to communicate between threads • select() to do I/O multiplexing • As always: ds/ds10/1.c ds/ds10/2.c

More Related