| use crate::{Interest, Token}; |
| use log::error; |
| use std::mem::MaybeUninit; |
| use std::ops::{Deref, DerefMut}; |
| use std::os::unix::io::{AsRawFd, RawFd}; |
| #[cfg(debug_assertions)] |
| use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering}; |
| use std::time::Duration; |
| use std::{cmp, io, ptr, slice}; |
| |
| /// Unique id for use as `SelectorId`. |
| #[cfg(debug_assertions)] |
| static NEXT_ID: AtomicUsize = AtomicUsize::new(1); |
| |
| // Type of the `nchanges` and `nevents` parameters in the `kevent` function. |
| #[cfg(not(target_os = "netbsd"))] |
| type Count = libc::c_int; |
| #[cfg(target_os = "netbsd")] |
| type Count = libc::size_t; |
| |
| // Type of the `filter` field in the `kevent` structure. |
| #[cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))] |
| type Filter = libc::c_short; |
| #[cfg(any(target_os = "macos", target_os = "ios"))] |
| type Filter = i16; |
| #[cfg(target_os = "netbsd")] |
| type Filter = u32; |
| |
| // Type of the `flags` field in the `kevent` structure. |
| #[cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))] |
| type Flags = libc::c_ushort; |
| #[cfg(any(target_os = "macos", target_os = "ios"))] |
| type Flags = u16; |
| #[cfg(target_os = "netbsd")] |
| type Flags = u32; |
| |
| // Type of the `data` field in the `kevent` structure. |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| type Data = libc::intptr_t; |
| #[cfg(any(target_os = "netbsd", target_os = "openbsd"))] |
| type Data = i64; |
| |
| // Type of the `udata` field in the `kevent` structure. |
| #[cfg(not(target_os = "netbsd"))] |
| type UData = *mut libc::c_void; |
| #[cfg(target_os = "netbsd")] |
| type UData = libc::intptr_t; |
| |
| macro_rules! kevent { |
| ($id: expr, $filter: expr, $flags: expr, $data: expr) => { |
| libc::kevent { |
| ident: $id as libc::uintptr_t, |
| filter: $filter as Filter, |
| flags: $flags, |
| fflags: 0, |
| data: 0, |
| udata: $data as UData, |
| } |
| }; |
| } |
| |
| #[derive(Debug)] |
| pub struct Selector { |
| #[cfg(debug_assertions)] |
| id: usize, |
| kq: RawFd, |
| #[cfg(debug_assertions)] |
| has_waker: AtomicBool, |
| } |
| |
| impl Selector { |
| pub fn new() -> io::Result<Selector> { |
| syscall!(kqueue()) |
| .and_then(|kq| syscall!(fcntl(kq, libc::F_SETFD, libc::FD_CLOEXEC)).map(|_| kq)) |
| .map(|kq| Selector { |
| #[cfg(debug_assertions)] |
| id: NEXT_ID.fetch_add(1, Ordering::Relaxed), |
| kq, |
| #[cfg(debug_assertions)] |
| has_waker: AtomicBool::new(false), |
| }) |
| } |
| |
| pub fn try_clone(&self) -> io::Result<Selector> { |
| syscall!(fcntl(self.kq, libc::F_DUPFD_CLOEXEC, super::LOWEST_FD)).map(|kq| Selector { |
| // It's the same selector, so we use the same id. |
| #[cfg(debug_assertions)] |
| id: self.id, |
| kq, |
| #[cfg(debug_assertions)] |
| has_waker: AtomicBool::new(self.has_waker.load(Ordering::Acquire)), |
| }) |
| } |
| |
| pub fn select(&self, events: &mut Events, timeout: Option<Duration>) -> io::Result<()> { |
| let timeout = timeout.map(|to| libc::timespec { |
| tv_sec: cmp::min(to.as_secs(), libc::time_t::max_value() as u64) as libc::time_t, |
| // `Duration::subsec_nanos` is guaranteed to be less than one |
| // billion (the number of nanoseconds in a second), making the |
| // cast to i32 safe. The cast itself is needed for platforms |
| // where C's long is only 32 bits. |
| tv_nsec: libc::c_long::from(to.subsec_nanos() as i32), |
| }); |
| let timeout = timeout |
| .as_ref() |
| .map(|s| s as *const _) |
| .unwrap_or(ptr::null_mut()); |
| |
| events.clear(); |
| syscall!(kevent( |
| self.kq, |
| ptr::null(), |
| 0, |
| events.as_mut_ptr(), |
| events.capacity() as Count, |
| timeout, |
| )) |
| .map(|n_events| { |
| // This is safe because `kevent` ensures that `n_events` are |
| // assigned. |
| unsafe { events.set_len(n_events as usize) }; |
| }) |
| } |
| |
| pub fn register(&self, fd: RawFd, token: Token, interests: Interest) -> io::Result<()> { |
| let flags = libc::EV_CLEAR | libc::EV_RECEIPT | libc::EV_ADD; |
| // At most we need two changes, but maybe we only need 1. |
| let mut changes: [MaybeUninit<libc::kevent>; 2] = |
| [MaybeUninit::uninit(), MaybeUninit::uninit()]; |
| let mut n_changes = 0; |
| |
| if interests.is_writable() { |
| let kevent = kevent!(fd, libc::EVFILT_WRITE, flags, token.0); |
| changes[n_changes] = MaybeUninit::new(kevent); |
| n_changes += 1; |
| } |
| |
| if interests.is_readable() { |
| let kevent = kevent!(fd, libc::EVFILT_READ, flags, token.0); |
| changes[n_changes] = MaybeUninit::new(kevent); |
| n_changes += 1; |
| } |
| |
| // Older versions of macOS (OS X 10.11 and 10.10 have been witnessed) |
| // can return EPIPE when registering a pipe file descriptor where the |
| // other end has already disappeared. For example code that creates a |
| // pipe, closes a file descriptor, and then registers the other end will |
| // see an EPIPE returned from `register`. |
| // |
| // It also turns out that kevent will still report events on the file |
| // descriptor, telling us that it's readable/hup at least after we've |
| // done this registration. As a result we just ignore `EPIPE` here |
| // instead of propagating it. |
| // |
| // More info can be found at tokio-rs/mio#582. |
| let changes = unsafe { |
| // This is safe because we ensure that at least `n_changes` are in |
| // the array. |
| slice::from_raw_parts_mut(changes[0].as_mut_ptr(), n_changes) |
| }; |
| kevent_register(self.kq, changes, &[libc::EPIPE as Data]) |
| } |
| |
| pub fn reregister(&self, fd: RawFd, token: Token, interests: Interest) -> io::Result<()> { |
| let flags = libc::EV_CLEAR | libc::EV_RECEIPT; |
| let write_flags = if interests.is_writable() { |
| flags | libc::EV_ADD |
| } else { |
| flags | libc::EV_DELETE |
| }; |
| let read_flags = if interests.is_readable() { |
| flags | libc::EV_ADD |
| } else { |
| flags | libc::EV_DELETE |
| }; |
| |
| let mut changes: [libc::kevent; 2] = [ |
| kevent!(fd, libc::EVFILT_WRITE, write_flags, token.0), |
| kevent!(fd, libc::EVFILT_READ, read_flags, token.0), |
| ]; |
| |
| // Since there is no way to check with which interests the fd was |
| // registered we modify both readable and write, adding it when required |
| // and removing it otherwise, ignoring the ENOENT error when it comes |
| // up. The ENOENT error informs us that a filter we're trying to remove |
| // wasn't there in first place, but we don't really care since our goal |
| // is accomplished. |
| // |
| // For the explanation of ignoring `EPIPE` see `register`. |
| kevent_register( |
| self.kq, |
| &mut changes, |
| &[libc::ENOENT as Data, libc::EPIPE as Data], |
| ) |
| } |
| |
| pub fn deregister(&self, fd: RawFd) -> io::Result<()> { |
| let flags = libc::EV_DELETE | libc::EV_RECEIPT; |
| let mut changes: [libc::kevent; 2] = [ |
| kevent!(fd, libc::EVFILT_WRITE, flags, 0), |
| kevent!(fd, libc::EVFILT_READ, flags, 0), |
| ]; |
| |
| // Since there is no way to check with which interests the fd was |
| // registered we remove both filters (readable and writeable) and ignore |
| // the ENOENT error when it comes up. The ENOENT error informs us that |
| // the filter wasn't there in first place, but we don't really care |
| // about that since our goal is to remove it. |
| kevent_register(self.kq, &mut changes, &[libc::ENOENT as Data]) |
| } |
| |
| #[cfg(debug_assertions)] |
| pub fn register_waker(&self) -> bool { |
| self.has_waker.swap(true, Ordering::AcqRel) |
| } |
| |
| // Used by `Waker`. |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| pub fn setup_waker(&self, token: Token) -> io::Result<()> { |
| // First attempt to accept user space notifications. |
| let mut kevent = kevent!( |
| 0, |
| libc::EVFILT_USER, |
| libc::EV_ADD | libc::EV_CLEAR | libc::EV_RECEIPT, |
| token.0 |
| ); |
| |
| syscall!(kevent(self.kq, &kevent, 1, &mut kevent, 1, ptr::null())).and_then(|_| { |
| if (kevent.flags & libc::EV_ERROR) != 0 && kevent.data != 0 { |
| Err(io::Error::from_raw_os_error(kevent.data as i32)) |
| } else { |
| Ok(()) |
| } |
| }) |
| } |
| |
| // Used by `Waker`. |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| pub fn wake(&self, token: Token) -> io::Result<()> { |
| let mut kevent = kevent!( |
| 0, |
| libc::EVFILT_USER, |
| libc::EV_ADD | libc::EV_RECEIPT, |
| token.0 |
| ); |
| kevent.fflags = libc::NOTE_TRIGGER; |
| |
| syscall!(kevent(self.kq, &kevent, 1, &mut kevent, 1, ptr::null())).and_then(|_| { |
| if (kevent.flags & libc::EV_ERROR) != 0 && kevent.data != 0 { |
| Err(io::Error::from_raw_os_error(kevent.data as i32)) |
| } else { |
| Ok(()) |
| } |
| }) |
| } |
| } |
| |
| /// Register `changes` with `kq`ueue. |
| fn kevent_register( |
| kq: RawFd, |
| changes: &mut [libc::kevent], |
| ignored_errors: &[Data], |
| ) -> io::Result<()> { |
| syscall!(kevent( |
| kq, |
| changes.as_ptr(), |
| changes.len() as Count, |
| changes.as_mut_ptr(), |
| changes.len() as Count, |
| ptr::null(), |
| )) |
| .map(|_| ()) |
| .or_else(|err| { |
| // According to the manual page of FreeBSD: "When kevent() call fails |
| // with EINTR error, all changes in the changelist have been applied", |
| // so we can safely ignore it. |
| if err.raw_os_error() == Some(libc::EINTR) { |
| Ok(()) |
| } else { |
| Err(err) |
| } |
| }) |
| .and_then(|()| check_errors(&changes, ignored_errors)) |
| } |
| |
| /// Check all events for possible errors, it returns the first error found. |
| fn check_errors(events: &[libc::kevent], ignored_errors: &[Data]) -> io::Result<()> { |
| for event in events { |
| // We can't use references to packed structures (in checking the ignored |
| // errors), so we need copy the data out before use. |
| let data = event.data; |
| // Check for the error flag, the actual error will be in the `data` |
| // field. |
| if (event.flags & libc::EV_ERROR != 0) && data != 0 && !ignored_errors.contains(&data) { |
| return Err(io::Error::from_raw_os_error(data as i32)); |
| } |
| } |
| Ok(()) |
| } |
| |
| cfg_io_source! { |
| #[cfg(debug_assertions)] |
| impl Selector { |
| pub fn id(&self) -> usize { |
| self.id |
| } |
| } |
| } |
| |
| impl AsRawFd for Selector { |
| fn as_raw_fd(&self) -> RawFd { |
| self.kq |
| } |
| } |
| |
| impl Drop for Selector { |
| fn drop(&mut self) { |
| if let Err(err) = syscall!(close(self.kq)) { |
| error!("error closing kqueue: {}", err); |
| } |
| } |
| } |
| |
| pub type Event = libc::kevent; |
| pub struct Events(Vec<libc::kevent>); |
| |
| impl Events { |
| pub fn with_capacity(capacity: usize) -> Events { |
| Events(Vec::with_capacity(capacity)) |
| } |
| } |
| |
| impl Deref for Events { |
| type Target = Vec<libc::kevent>; |
| |
| fn deref(&self) -> &Self::Target { |
| &self.0 |
| } |
| } |
| |
| impl DerefMut for Events { |
| fn deref_mut(&mut self) -> &mut Self::Target { |
| &mut self.0 |
| } |
| } |
| |
| // `Events` cannot derive `Send` or `Sync` because of the |
| // `udata: *mut ::c_void` field in `libc::kevent`. However, `Events`'s public |
| // API treats the `udata` field as a `uintptr_t` which is `Send`. `Sync` is |
| // safe because with a `events: &Events` value, the only access to the `udata` |
| // field is through `fn token(event: &Event)` which cannot mutate the field. |
| unsafe impl Send for Events {} |
| unsafe impl Sync for Events {} |
| |
| pub mod event { |
| use std::fmt; |
| |
| use crate::sys::Event; |
| use crate::Token; |
| |
| use super::{Filter, Flags}; |
| |
| pub fn token(event: &Event) -> Token { |
| Token(event.udata as usize) |
| } |
| |
| pub fn is_readable(event: &Event) -> bool { |
| event.filter == libc::EVFILT_READ || { |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| // Used by the `Awakener`. On platforms that use `eventfd` or a unix |
| // pipe it will emit a readable event so we'll fake that here as |
| // well. |
| { |
| event.filter == libc::EVFILT_USER |
| } |
| #[cfg(not(any(target_os = "freebsd", target_os = "ios", target_os = "macos")))] |
| { |
| false |
| } |
| } |
| } |
| |
| pub fn is_writable(event: &Event) -> bool { |
| event.filter == libc::EVFILT_WRITE |
| } |
| |
| pub fn is_error(event: &Event) -> bool { |
| (event.flags & libc::EV_ERROR) != 0 || |
| // When the read end of the socket is closed, EV_EOF is set on |
| // flags, and fflags contains the error if there is one. |
| (event.flags & libc::EV_EOF) != 0 && event.fflags != 0 |
| } |
| |
| pub fn is_read_closed(event: &Event) -> bool { |
| event.filter == libc::EVFILT_READ && event.flags & libc::EV_EOF != 0 |
| } |
| |
| pub fn is_write_closed(event: &Event) -> bool { |
| event.filter == libc::EVFILT_WRITE && event.flags & libc::EV_EOF != 0 |
| } |
| |
| pub fn is_priority(_: &Event) -> bool { |
| // kqueue doesn't have priority indicators. |
| false |
| } |
| |
| #[allow(unused_variables)] // `event` is not used on some platforms. |
| pub fn is_aio(event: &Event) -> bool { |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| { |
| event.filter == libc::EVFILT_AIO |
| } |
| #[cfg(not(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| )))] |
| { |
| false |
| } |
| } |
| |
| #[allow(unused_variables)] // `event` is only used on FreeBSD. |
| pub fn is_lio(event: &Event) -> bool { |
| #[cfg(target_os = "freebsd")] |
| { |
| event.filter == libc::EVFILT_LIO |
| } |
| #[cfg(not(target_os = "freebsd"))] |
| { |
| false |
| } |
| } |
| |
| pub fn debug_details(f: &mut fmt::Formatter<'_>, event: &Event) -> fmt::Result { |
| debug_detail!( |
| FilterDetails(Filter), |
| PartialEq::eq, |
| libc::EVFILT_READ, |
| libc::EVFILT_WRITE, |
| libc::EVFILT_AIO, |
| libc::EVFILT_VNODE, |
| libc::EVFILT_PROC, |
| libc::EVFILT_SIGNAL, |
| libc::EVFILT_TIMER, |
| #[cfg(target_os = "freebsd")] |
| libc::EVFILT_PROCDESC, |
| #[cfg(any( |
| target_os = "freebsd", |
| target_os = "dragonfly", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::EVFILT_FS, |
| #[cfg(target_os = "freebsd")] |
| libc::EVFILT_LIO, |
| #[cfg(any( |
| target_os = "freebsd", |
| target_os = "dragonfly", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::EVFILT_USER, |
| #[cfg(target_os = "freebsd")] |
| libc::EVFILT_SENDFILE, |
| #[cfg(target_os = "freebsd")] |
| libc::EVFILT_EMPTY, |
| #[cfg(target_os = "dragonfly")] |
| libc::EVFILT_EXCEPT, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::EVFILT_MACHPORT, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::EVFILT_VM, |
| ); |
| |
| #[allow(clippy::trivially_copy_pass_by_ref)] |
| fn check_flag(got: &Flags, want: &Flags) -> bool { |
| (got & want) != 0 |
| } |
| debug_detail!( |
| FlagsDetails(Flags), |
| check_flag, |
| libc::EV_ADD, |
| libc::EV_DELETE, |
| libc::EV_ENABLE, |
| libc::EV_DISABLE, |
| libc::EV_ONESHOT, |
| libc::EV_CLEAR, |
| libc::EV_RECEIPT, |
| libc::EV_DISPATCH, |
| #[cfg(target_os = "freebsd")] |
| libc::EV_DROP, |
| libc::EV_FLAG1, |
| libc::EV_ERROR, |
| libc::EV_EOF, |
| libc::EV_SYSFLAGS, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::EV_FLAG0, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::EV_POLL, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::EV_OOBAND, |
| #[cfg(target_os = "dragonfly")] |
| libc::EV_NODATA, |
| ); |
| |
| #[allow(clippy::trivially_copy_pass_by_ref)] |
| fn check_fflag(got: &u32, want: &u32) -> bool { |
| (got & want) != 0 |
| } |
| debug_detail!( |
| FflagsDetails(u32), |
| check_fflag, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_TRIGGER, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_FFNOP, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_FFAND, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_FFOR, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_FFCOPY, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_FFCTRLMASK, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "ios", |
| target_os = "macos" |
| ))] |
| libc::NOTE_FFLAGSMASK, |
| libc::NOTE_LOWAT, |
| libc::NOTE_DELETE, |
| libc::NOTE_WRITE, |
| #[cfg(target_os = "dragonfly")] |
| libc::NOTE_OOB, |
| #[cfg(target_os = "openbsd")] |
| libc::NOTE_EOF, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXTEND, |
| libc::NOTE_ATTRIB, |
| libc::NOTE_LINK, |
| libc::NOTE_RENAME, |
| libc::NOTE_REVOKE, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_NONE, |
| #[cfg(any(target_os = "openbsd"))] |
| libc::NOTE_TRUNCATE, |
| libc::NOTE_EXIT, |
| libc::NOTE_FORK, |
| libc::NOTE_EXEC, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_SIGNAL, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXITSTATUS, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXIT_DETAIL, |
| libc::NOTE_PDATAMASK, |
| libc::NOTE_PCTRLMASK, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "netbsd", |
| target_os = "openbsd" |
| ))] |
| libc::NOTE_TRACK, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "netbsd", |
| target_os = "openbsd" |
| ))] |
| libc::NOTE_TRACKERR, |
| #[cfg(any( |
| target_os = "dragonfly", |
| target_os = "freebsd", |
| target_os = "netbsd", |
| target_os = "openbsd" |
| ))] |
| libc::NOTE_CHILD, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXIT_DETAIL_MASK, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXIT_DECRYPTFAIL, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXIT_MEMORY, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_EXIT_CSERROR, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_VM_PRESSURE, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_VM_PRESSURE_TERMINATE, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_VM_PRESSURE_SUDDEN_TERMINATE, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_VM_ERROR, |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| libc::NOTE_SECONDS, |
| #[cfg(any(target_os = "freebsd"))] |
| libc::NOTE_MSECONDS, |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| libc::NOTE_USECONDS, |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| libc::NOTE_NSECONDS, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| #[cfg(any(target_os = "freebsd", target_os = "ios", target_os = "macos"))] |
| libc::NOTE_ABSOLUTE, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_LEEWAY, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_CRITICAL, |
| #[cfg(any(target_os = "ios", target_os = "macos"))] |
| libc::NOTE_BACKGROUND, |
| ); |
| |
| // Can't reference fields in packed structures. |
| let ident = event.ident; |
| let data = event.data; |
| let udata = event.udata; |
| f.debug_struct("kevent") |
| .field("ident", &ident) |
| .field("filter", &FilterDetails(event.filter)) |
| .field("flags", &FlagsDetails(event.flags)) |
| .field("fflags", &FflagsDetails(event.fflags)) |
| .field("data", &data) |
| .field("udata", &udata) |
| .finish() |
| } |
| } |
| |
| #[test] |
| #[cfg(feature = "os-ext")] |
| fn does_not_register_rw() { |
| use crate::unix::SourceFd; |
| use crate::{Poll, Token}; |
| |
| let kq = unsafe { libc::kqueue() }; |
| let mut kqf = SourceFd(&kq); |
| let poll = Poll::new().unwrap(); |
| |
| // Registering kqueue fd will fail if write is requested (On anything but |
| // some versions of macOS). |
| poll.registry() |
| .register(&mut kqf, Token(1234), Interest::READABLE) |
| .unwrap(); |
| } |
