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use libc::{self, c_int};
#[macro_use]
pub mod dlsym;
#[cfg(any(target_os = "linux", target_os = "android", target_os = "solaris"))]
mod epoll;
#[cfg(any(target_os = "linux", target_os = "android", target_os = "solaris"))]
pub use self::epoll::{Events, Selector};
#[cfg(any(target_os = "bitrig", target_os = "dragonfly",
target_os = "freebsd", target_os = "ios", target_os = "macos",
target_os = "netbsd", target_os = "openbsd"))]
mod kqueue;
#[cfg(any(target_os = "bitrig", target_os = "dragonfly",
target_os = "freebsd", target_os = "ios", target_os = "macos",
target_os = "netbsd", target_os = "openbsd"))]
pub use self::kqueue::{Events, Selector};
mod awakener;
mod eventedfd;
mod io;
mod ready;
mod tcp;
mod udp;
mod uio;
#[cfg(feature = "with-deprecated")]
mod uds;
pub use self::awakener::Awakener;
pub use self::eventedfd::EventedFd;
pub use self::io::{Io, set_nonblock};
pub use self::ready::{UnixReady, READY_ALL};
pub use self::tcp::{TcpStream, TcpListener};
pub use self::udp::UdpSocket;
#[cfg(feature = "with-deprecated")]
pub use self::uds::UnixSocket;
pub use iovec::IoVec;
use std::os::unix::io::FromRawFd;
pub fn pipe() -> ::io::Result<(Io, Io)> {
// Use pipe2 for atomically setting O_CLOEXEC if we can, but otherwise
// just fall back to using `pipe`.
dlsym!(fn pipe2(*mut c_int, c_int) -> c_int);
let mut pipes = [0; 2];
unsafe {
match pipe2.get() {
Some(pipe2_fn) => {
let flags = libc::O_NONBLOCK | libc::O_CLOEXEC;
cvt(pipe2_fn(pipes.as_mut_ptr(), flags))?;
Ok((Io::from_raw_fd(pipes[0]), Io::from_raw_fd(pipes[1])))
}
None => {
cvt(libc::pipe(pipes.as_mut_ptr()))?;
// Ensure the pipe are closed if any of the system calls below
// fail.
let r = Io::from_raw_fd(pipes[0]);
let w = Io::from_raw_fd(pipes[1]);
cvt(libc::fcntl(pipes[0], libc::F_SETFD, libc::FD_CLOEXEC))?;
cvt(libc::fcntl(pipes[1], libc::F_SETFD, libc::FD_CLOEXEC))?;
cvt(libc::fcntl(pipes[0], libc::F_SETFL, libc::O_NONBLOCK))?;
cvt(libc::fcntl(pipes[1], libc::F_SETFL, libc::O_NONBLOCK))?;
Ok((r, w))
}
}
}
}
trait IsMinusOne {
fn is_minus_one(&self) -> bool;
}
impl IsMinusOne for i32 {
fn is_minus_one(&self) -> bool { *self == -1 }
}
impl IsMinusOne for isize {
fn is_minus_one(&self) -> bool { *self == -1 }
}
fn cvt<T: IsMinusOne>(t: T) -> ::io::Result<T> {
use std::io;
if t.is_minus_one() {
Err(io::Error::last_os_error())
} else {
Ok(t)
}
}
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