| use crate::errno::Errno; |
| use crate::Result; |
| use libc::{self, c_int}; |
| use std::mem; |
| use std::os::unix::io::RawFd; |
| use std::ptr; |
| |
| libc_bitflags!( |
| pub struct EpollFlags: c_int { |
| EPOLLIN; |
| EPOLLPRI; |
| EPOLLOUT; |
| EPOLLRDNORM; |
| EPOLLRDBAND; |
| EPOLLWRNORM; |
| EPOLLWRBAND; |
| EPOLLMSG; |
| EPOLLERR; |
| EPOLLHUP; |
| EPOLLRDHUP; |
| EPOLLEXCLUSIVE; |
| #[cfg(not(target_arch = "mips"))] |
| EPOLLWAKEUP; |
| EPOLLONESHOT; |
| EPOLLET; |
| } |
| ); |
| |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| #[repr(i32)] |
| #[non_exhaustive] |
| pub enum EpollOp { |
| EpollCtlAdd = libc::EPOLL_CTL_ADD, |
| EpollCtlDel = libc::EPOLL_CTL_DEL, |
| EpollCtlMod = libc::EPOLL_CTL_MOD, |
| } |
| |
| libc_bitflags! { |
| pub struct EpollCreateFlags: c_int { |
| EPOLL_CLOEXEC; |
| } |
| } |
| |
| #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)] |
| #[repr(transparent)] |
| pub struct EpollEvent { |
| event: libc::epoll_event, |
| } |
| |
| impl EpollEvent { |
| pub fn new(events: EpollFlags, data: u64) -> Self { |
| EpollEvent { |
| event: libc::epoll_event { |
| events: events.bits() as u32, |
| u64: data, |
| }, |
| } |
| } |
| |
| pub fn empty() -> Self { |
| unsafe { mem::zeroed::<EpollEvent>() } |
| } |
| |
| pub fn events(&self) -> EpollFlags { |
| EpollFlags::from_bits(self.event.events as c_int).unwrap() |
| } |
| |
| pub fn data(&self) -> u64 { |
| self.event.u64 |
| } |
| } |
| |
| #[inline] |
| pub fn epoll_create() -> Result<RawFd> { |
| let res = unsafe { libc::epoll_create(1024) }; |
| |
| Errno::result(res) |
| } |
| |
| #[inline] |
| pub fn epoll_create1(flags: EpollCreateFlags) -> Result<RawFd> { |
| let res = unsafe { libc::epoll_create1(flags.bits()) }; |
| |
| Errno::result(res) |
| } |
| |
| #[inline] |
| pub fn epoll_ctl<'a, T>( |
| epfd: RawFd, |
| op: EpollOp, |
| fd: RawFd, |
| event: T, |
| ) -> Result<()> |
| where |
| T: Into<Option<&'a mut EpollEvent>>, |
| { |
| let mut event: Option<&mut EpollEvent> = event.into(); |
| if event.is_none() && op != EpollOp::EpollCtlDel { |
| Err(Errno::EINVAL) |
| } else { |
| let res = unsafe { |
| if let Some(ref mut event) = event { |
| libc::epoll_ctl(epfd, op as c_int, fd, &mut event.event) |
| } else { |
| libc::epoll_ctl(epfd, op as c_int, fd, ptr::null_mut()) |
| } |
| }; |
| Errno::result(res).map(drop) |
| } |
| } |
| |
| #[inline] |
| pub fn epoll_wait( |
| epfd: RawFd, |
| events: &mut [EpollEvent], |
| timeout_ms: isize, |
| ) -> Result<usize> { |
| let res = unsafe { |
| libc::epoll_wait( |
| epfd, |
| events.as_mut_ptr() as *mut libc::epoll_event, |
| events.len() as c_int, |
| timeout_ms as c_int, |
| ) |
| }; |
| |
| Errno::result(res).map(|r| r as usize) |
| } |