lib.rs.html -- source
Description: Source to the Rust file `src/lib.rs`.
Keywords: rust, rustlang, rust-lang

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    //!Make File Descriptors Nonblocking
    //!
    //!Creates a simple interface around fcntl to set file descriptors as non
    //!blocking. This crate will work on all `unix` systems as classified by
    //!Rust.

    extern crate mio;
    use mio::unix::EventedFd;
    extern crate libc;
    use libc::{F_GETFD,F_SETFD,fcntl,O_NONBLOCK};
    use std::io::Error;
    use std::os::unix::io::{AsRawFd,RawFd};

    ///Make File Descriptor NonBlocking
    ///
    ///Sets the O_NONBLOCK for more information [follow this
    ///link](http://man7.org/linux/man-pages/man2/fcntl.2.html)
    ///
    pub fn set_non_blocking<'a, F>(fd: &'a F) -> Result<(),Error>
    where F: AsRawFd
    {
        let fd = fd.as_raw_fd();
        unsafe{
            let flags = fcntl(fd, F_GETFD, 0);
            let status = fcntl(fd,F_SETFD, flags | O_NONBLOCK);
            if status < 0 {
                Err(Error::last_os_error())
            } else {
                Ok(())
            }
        }
    }

    ///Make an Evented Fd
    ///
    ///Creates a simple and safe interface to interface with MIO. The goal is
    ///to allow mio to work with File IO. Provided your system is unix this
    ///will let it interface with MIO event loop.
    ///
    ///The `RawFd` passed to this function will be made non-blocking.
    ///
    pub fn evented_fd<'a>(fd: &'a RawFd) -> Result<EventedFd<'a>,Error> {
        let f_d = *fd;
        unsafe{
            let flags = fcntl(f_d, F_GETFD, 0);
            let status = fcntl(f_d,F_SETFD, flags | O_NONBLOCK);
            if status < 0 {
                Err(Error::last_os_error())
            } else {
                Ok(EventedFd(fd))
            }
        }
    }

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