diff options
Diffstat (limited to 'vendor/rustix/src/backend/linux_raw/event')
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/event/epoll.rs | 470 | ||||
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/event/mod.rs | 4 | ||||
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/event/poll_fd.rs | 98 | ||||
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/event/syscalls.rs | 152 | ||||
| -rw-r--r-- | vendor/rustix/src/backend/linux_raw/event/types.rs | 21 |
5 files changed, 745 insertions, 0 deletions
diff --git a/vendor/rustix/src/backend/linux_raw/event/epoll.rs b/vendor/rustix/src/backend/linux_raw/event/epoll.rs new file mode 100644 index 0000000..3d5787b --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/event/epoll.rs @@ -0,0 +1,470 @@ +//! Linux `epoll` support. +//! +//! # Examples +//! +//! ```no_run +//! # #[cfg(feature = "net")] +//! # fn main() -> std::io::Result<()> { +//! use rustix::event::epoll; +//! use rustix::fd::AsFd; +//! use rustix::io::{ioctl_fionbio, read, write}; +//! use rustix::net::{ +//! accept, bind_v4, listen, socket, AddressFamily, Ipv4Addr, SocketAddrV4, SocketType, +//! }; +//! use std::collections::HashMap; +//! use std::os::unix::io::AsRawFd; +//! +//! // Create a socket and listen on it. +//! let listen_sock = socket(AddressFamily::INET, SocketType::STREAM, None)?; +//! bind_v4(&listen_sock, &SocketAddrV4::new(Ipv4Addr::LOCALHOST, 0))?; +//! listen(&listen_sock, 1)?; +//! +//! // Create an epoll object. Using `Owning` here means the epoll object will +//! // take ownership of the file descriptors registered with it. +//! let epoll = epoll::create(epoll::CreateFlags::CLOEXEC)?; +//! +//! // Register the socket with the epoll object. +//! epoll::add( +//! &epoll, +//! &listen_sock, +//! epoll::EventData::new_u64(1), +//! epoll::EventFlags::IN, +//! )?; +//! +//! // Keep track of the sockets we've opened. +//! let mut next_id = epoll::EventData::new_u64(2); +//! let mut sockets = HashMap::new(); +//! +//! // Process events. +//! let mut event_list = epoll::EventVec::with_capacity(4); +//! loop { +//! epoll::wait(&epoll, &mut event_list, -1)?; +//! for event in &event_list { +//! let target = event.data; +//! if target.u64() == 1 { +//! // Accept a new connection, set it to non-blocking, and +//! // register to be notified when it's ready to write to. +//! let conn_sock = accept(&listen_sock)?; +//! ioctl_fionbio(&conn_sock, true)?; +//! epoll::add( +//! &epoll, +//! &conn_sock, +//! next_id, +//! epoll::EventFlags::OUT | epoll::EventFlags::ET, +//! )?; +//! +//! // Keep track of the socket. +//! sockets.insert(next_id, conn_sock); +//! next_id = epoll::EventData::new_u64(next_id.u64() + 1); +//! } else { +//! // Write a message to the stream and then unregister it. +//! let target = sockets.remove(&target).unwrap(); +//! write(&target, b"hello\n")?; +//! let _ = epoll::delete(&epoll, &target)?; +//! } +//! } +//! } +//! # } +//! # #[cfg(not(feature = "net"))] +//! # fn main() {} +//! ``` + +#![allow(unsafe_code)] + +use crate::backend::c; +use crate::backend::event::syscalls; +use crate::fd::{AsFd, AsRawFd, OwnedFd}; +use crate::io; +#[cfg(feature = "alloc")] +use alloc::vec::Vec; +use bitflags::bitflags; +use core::ffi::c_void; +use core::hash::{Hash, Hasher}; +use core::slice; + +bitflags! { + /// `EPOLL_*` for use with [`new`]. + #[repr(transparent)] + #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] + pub struct CreateFlags: c::c_uint { + /// `EPOLL_CLOEXEC` + const CLOEXEC = linux_raw_sys::general::EPOLL_CLOEXEC; + + /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags> + const _ = !0; + } +} + +bitflags! { + /// `EPOLL*` for use with [`add`]. + #[repr(transparent)] + #[derive(Default, Copy, Clone, Eq, PartialEq, Hash, Debug)] + pub struct EventFlags: u32 { + /// `EPOLLIN` + const IN = linux_raw_sys::general::EPOLLIN as u32; + + /// `EPOLLOUT` + const OUT = linux_raw_sys::general::EPOLLOUT as u32; + + /// `EPOLLPRI` + const PRI = linux_raw_sys::general::EPOLLPRI as u32; + + /// `EPOLLERR` + const ERR = linux_raw_sys::general::EPOLLERR as u32; + + /// `EPOLLHUP` + const HUP = linux_raw_sys::general::EPOLLHUP as u32; + + /// `EPOLLRDNORM` + const RDNORM = linux_raw_sys::general::EPOLLRDNORM as u32; + + /// `EPOLLRDBAND` + const RDBAND = linux_raw_sys::general::EPOLLRDBAND as u32; + + /// `EPOLLWRNORM` + const WRNORM = linux_raw_sys::general::EPOLLWRNORM as u32; + + /// `EPOLLWRBAND` + const WRBAND = linux_raw_sys::general::EPOLLWRBAND as u32; + + /// `EPOLLMSG` + const MSG = linux_raw_sys::general::EPOLLMSG as u32; + + /// `EPOLLRDHUP` + const RDHUP = linux_raw_sys::general::EPOLLRDHUP as u32; + + /// `EPOLLET` + const ET = linux_raw_sys::general::EPOLLET as u32; + + /// `EPOLLONESHOT` + const ONESHOT = linux_raw_sys::general::EPOLLONESHOT as u32; + + /// `EPOLLWAKEUP` + const WAKEUP = linux_raw_sys::general::EPOLLWAKEUP as u32; + + /// `EPOLLEXCLUSIVE` + const EXCLUSIVE = linux_raw_sys::general::EPOLLEXCLUSIVE as u32; + + /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags> + const _ = !0; + } +} + +/// `epoll_create1(flags)`—Creates a new epoll object. +/// +/// Use the [`CreateFlags::CLOEXEC`] flag to prevent the resulting file +/// descriptor from being implicitly passed across `exec` boundaries. +#[inline] +#[doc(alias = "epoll_create1")] +pub fn create(flags: CreateFlags) -> io::Result<OwnedFd> { + syscalls::epoll_create(flags) +} + +/// `epoll_ctl(self, EPOLL_CTL_ADD, data, event)`—Adds an element to an epoll +/// object. +/// +/// This registers interest in any of the events set in `events` occurring on +/// the file descriptor associated with `data`. +/// +/// If [`delete`] is not called on the I/O source passed into this function +/// before the I/O source is `close`d, then the `epoll` will act as if the I/O +/// source is still registered with it. This can lead to spurious events being +/// returned from [`wait`]. If a file descriptor is an +/// `Arc<dyn SystemResource>`, then `epoll` can be thought to maintain a +/// `Weak<dyn SystemResource>` to the file descriptor. +#[doc(alias = "epoll_ctl")] +#[inline] +pub fn add( + epoll: impl AsFd, + source: impl AsFd, + data: EventData, + event_flags: EventFlags, +) -> io::Result<()> { + // SAFETY: We're calling `epoll_ctl` via FFI and we know how it + // behaves. + unsafe { + syscalls::epoll_add( + epoll.as_fd(), + source.as_fd().as_raw_fd(), + &Event { + flags: event_flags, + data, + }, + ) + } +} + +/// `epoll_ctl(self, EPOLL_CTL_MOD, target, event)`—Modifies an element in a +/// given epoll object. +/// +/// This sets the events of interest with `target` to `events`. +#[doc(alias = "epoll_ctl")] +#[inline] +pub fn modify( + epoll: impl AsFd, + source: impl AsFd, + data: EventData, + event_flags: EventFlags, +) -> io::Result<()> { + // SAFETY: We're calling `epoll_ctl` via FFI and we know how it + // behaves. + unsafe { + let raw_fd = source.as_fd().as_raw_fd(); + syscalls::epoll_mod( + epoll.as_fd(), + raw_fd, + &Event { + flags: event_flags, + data, + }, + ) + } +} + +/// `epoll_ctl(self, EPOLL_CTL_DEL, target, NULL)`—Removes an element in a +/// given epoll object. +#[doc(alias = "epoll_ctl")] +#[inline] +pub fn delete(epoll: impl AsFd, source: impl AsFd) -> io::Result<()> { + // SAFETY: We're calling `epoll_ctl` via FFI and we know how it + // behaves. + unsafe { + let raw_fd = source.as_fd().as_raw_fd(); + syscalls::epoll_del(epoll.as_fd(), raw_fd) + } +} + +/// `epoll_wait(self, events, timeout)`—Waits for registered events of +/// interest. +/// +/// For each event of interest, an element is written to `events`. On +/// success, this returns the number of written elements. +#[cfg(feature = "alloc")] +#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))] +#[inline] +pub fn wait(epoll: impl AsFd, event_list: &mut EventVec, timeout: c::c_int) -> io::Result<()> { + // SAFETY: We're calling `epoll_wait` via FFI and we know how it + // behaves. + unsafe { + event_list.events.set_len(0); + let nfds = syscalls::epoll_wait( + epoll.as_fd(), + event_list.events[..].as_mut_ptr().cast(), + event_list.events.capacity(), + timeout, + )?; + event_list.events.set_len(nfds); + } + + Ok(()) +} + +/// An iterator over the `Event`s in an `EventVec`. +pub struct Iter<'a> { + /// Use `Copied` to copy the struct, since `Event` is `packed` on some + /// platforms, and it's common for users to directly destructure it, which + /// would lead to errors about forming references to packed fields. + iter: core::iter::Copied<slice::Iter<'a, Event>>, +} + +impl<'a> Iterator for Iter<'a> { + type Item = Event; + + #[inline] + fn next(&mut self) -> Option<Self::Item> { + self.iter.next() + } +} + +/// A record of an event that occurred. +#[repr(C)] +#[cfg_attr(target_arch = "x86_64", repr(packed))] +#[derive(Copy, Clone, Eq, PartialEq, Hash)] +pub struct Event { + /// Which specific event(s) occurred. + pub flags: EventFlags, + /// User data. + pub data: EventData, +} + +/// Data associated with an [`Event`]. This can either be a 64-bit integer +/// value or a pointer which preserves pointer provenance. +#[repr(C)] +#[derive(Copy, Clone)] +pub union EventData { + /// A 64-bit integer value. + as_u64: u64, + + /// A `*mut c_void` which preserves pointer provenance, extended to be + /// 64-bit so that if we read the value as a `u64` union field, we don't + /// get uninitialized memory. + sixty_four_bit_pointer: SixtyFourBitPointer, +} + +impl EventData { + /// Construct a new value containing a `u64`. + #[inline] + pub const fn new_u64(value: u64) -> Self { + Self { as_u64: value } + } + + /// Construct a new value containing a `*mut c_void`. + #[inline] + pub const fn new_ptr(value: *mut c_void) -> Self { + Self { + sixty_four_bit_pointer: SixtyFourBitPointer { + pointer: value, + #[cfg(target_pointer_width = "32")] + _padding: 0, + }, + } + } + + /// Return the value as a `u64`. + /// + /// If the stored value was a pointer, the pointer is zero-extended to a + /// `u64`. + #[inline] + pub fn u64(self) -> u64 { + unsafe { self.as_u64 } + } + + /// Return the value as a `*mut c_void`. + /// + /// If the stored value was a `u64`, the least-significant bits of the + /// `u64` are returned as a pointer value. + #[inline] + pub fn ptr(self) -> *mut c_void { + unsafe { self.sixty_four_bit_pointer.pointer } + } +} + +impl PartialEq for EventData { + #[inline] + fn eq(&self, other: &Self) -> bool { + self.u64() == other.u64() + } +} + +impl Eq for EventData {} + +impl Hash for EventData { + #[inline] + fn hash<H: Hasher>(&self, state: &mut H) { + self.u64().hash(state) + } +} + +#[repr(C)] +#[derive(Copy, Clone)] +struct SixtyFourBitPointer { + #[cfg(target_endian = "big")] + #[cfg(target_pointer_width = "32")] + _padding: u32, + + pointer: *mut c_void, + + #[cfg(target_endian = "little")] + #[cfg(target_pointer_width = "32")] + _padding: u32, +} + +/// A vector of `Event`s, plus context for interpreting them. +#[cfg(feature = "alloc")] +pub struct EventVec { + events: Vec<Event>, +} + +#[cfg(feature = "alloc")] +impl EventVec { + /// Constructs an `EventVec` from raw pointer, length, and capacity. + /// + /// # Safety + /// + /// This function calls [`Vec::from_raw_parts`] with its arguments. + /// + /// [`Vec::from_raw_parts`]: https://doc.rust-lang.org/stable/std/vec/struct.Vec.html#method.from_raw_parts + #[inline] + pub unsafe fn from_raw_parts(ptr: *mut Event, len: usize, capacity: usize) -> Self { + Self { + events: Vec::from_raw_parts(ptr, len, capacity), + } + } + + /// Constructs an `EventVec` with memory for `capacity` `Event`s. + #[inline] + pub fn with_capacity(capacity: usize) -> Self { + Self { + events: Vec::with_capacity(capacity), + } + } + + /// Returns the current `Event` capacity of this `EventVec`. + #[inline] + pub fn capacity(&self) -> usize { + self.events.capacity() + } + + /// Reserves enough memory for at least `additional` more `Event`s. + #[inline] + pub fn reserve(&mut self, additional: usize) { + self.events.reserve(additional); + } + + /// Reserves enough memory for exactly `additional` more `Event`s. + #[inline] + pub fn reserve_exact(&mut self, additional: usize) { + self.events.reserve_exact(additional); + } + + /// Clears all the `Events` out of this `EventVec`. + #[inline] + pub fn clear(&mut self) { + self.events.clear(); + } + + /// Shrinks the capacity of this `EventVec` as much as possible. + #[inline] + pub fn shrink_to_fit(&mut self) { + self.events.shrink_to_fit(); + } + + /// Returns an iterator over the `Event`s in this `EventVec`. + #[inline] + pub fn iter(&self) -> Iter<'_> { + Iter { + iter: self.events.iter().copied(), + } + } + + /// Returns the number of `Event`s logically contained in this `EventVec`. + #[inline] + pub fn len(&mut self) -> usize { + self.events.len() + } + + /// Tests whether this `EventVec` is logically empty. + #[inline] + pub fn is_empty(&mut self) -> bool { + self.events.is_empty() + } +} + +#[cfg(feature = "alloc")] +impl<'a> IntoIterator for &'a EventVec { + type IntoIter = Iter<'a>; + type Item = Event; + + #[inline] + fn into_iter(self) -> Self::IntoIter { + self.iter() + } +} + +#[test] +fn test_epoll_layouts() { + check_renamed_type!(Event, epoll_event); + check_renamed_type!(Event, epoll_event); + check_renamed_struct_renamed_field!(Event, epoll_event, flags, events); + check_renamed_struct_renamed_field!(Event, epoll_event, data, data); +} diff --git a/vendor/rustix/src/backend/linux_raw/event/mod.rs b/vendor/rustix/src/backend/linux_raw/event/mod.rs new file mode 100644 index 0000000..605de25 --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/event/mod.rs @@ -0,0 +1,4 @@ +pub mod epoll; +pub(crate) mod poll_fd; +pub(crate) mod syscalls; +pub(crate) mod types; diff --git a/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs b/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs new file mode 100644 index 0000000..9de43f2 --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/event/poll_fd.rs @@ -0,0 +1,98 @@ +use crate::fd::{AsFd, BorrowedFd}; +use bitflags::bitflags; + +bitflags! { + /// `POLL*` flags for use with [`poll`]. + /// + /// [`poll`]: crate::event::poll + #[repr(transparent)] + #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] + pub struct PollFlags: u16 { + /// `POLLIN` + const IN = linux_raw_sys::general::POLLIN as u16; + /// `POLLPRI` + const PRI = linux_raw_sys::general::POLLPRI as u16; + /// `POLLOUT` + const OUT = linux_raw_sys::general::POLLOUT as u16; + /// `POLLRDNORM` + const RDNORM = linux_raw_sys::general::POLLRDNORM as u16; + /// `POLLWRNORM` + const WRNORM = linux_raw_sys::general::POLLWRNORM as u16; + /// `POLLRDBAND` + const RDBAND = linux_raw_sys::general::POLLRDBAND as u16; + /// `POLLWRBAND` + const WRBAND = linux_raw_sys::general::POLLWRBAND as u16; + /// `POLLERR` + const ERR = linux_raw_sys::general::POLLERR as u16; + /// `POLLHUP` + const HUP = linux_raw_sys::general::POLLHUP as u16; + /// `POLLNVAL` + const NVAL = linux_raw_sys::general::POLLNVAL as u16; + /// `POLLRDHUP` + const RDHUP = linux_raw_sys::general::POLLRDHUP as u16; + + /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags> + const _ = !0; + } +} + +/// `struct pollfd`—File descriptor and flags for use with [`poll`]. +/// +/// [`poll`]: crate::event::poll +#[doc(alias = "pollfd")] +#[repr(C)] +#[derive(Debug, Clone)] +pub struct PollFd<'fd> { + pub(crate) fd: BorrowedFd<'fd>, + pub(crate) events: u16, + pub(crate) revents: u16, +} + +impl<'fd> PollFd<'fd> { + /// Constructs a new `PollFd` holding `fd` and `events`. + #[inline] + pub fn new<Fd: AsFd>(fd: &'fd Fd, events: PollFlags) -> Self { + Self::from_borrowed_fd(fd.as_fd(), events) + } + + /// Sets the contained file descriptor to `fd`. + #[inline] + pub fn set_fd<Fd: AsFd>(&mut self, fd: &'fd Fd) { + self.fd = fd.as_fd(); + } + + /// Clears the ready events. + #[inline] + pub fn clear_revents(&mut self) { + self.revents = 0; + } + + /// Constructs a new `PollFd` holding `fd` and `events`. + /// + /// This is the same as `new`, but can be used to avoid borrowing the + /// `BorrowedFd`, which can be tricky in situations where the `BorrowedFd` + /// is a temporary. + #[inline] + pub fn from_borrowed_fd(fd: BorrowedFd<'fd>, events: PollFlags) -> Self { + Self { + fd, + events: events.bits(), + revents: 0, + } + } + + /// Returns the ready events. + #[inline] + pub fn revents(&self) -> PollFlags { + // Use `.unwrap()` here because in theory we know we know all the bits + // the OS might set here, but OS's have added extensions in the past. + PollFlags::from_bits(self.revents).unwrap() + } +} + +impl<'fd> AsFd for PollFd<'fd> { + #[inline] + fn as_fd(&self) -> BorrowedFd<'_> { + self.fd.as_fd() + } +} diff --git a/vendor/rustix/src/backend/linux_raw/event/syscalls.rs b/vendor/rustix/src/backend/linux_raw/event/syscalls.rs new file mode 100644 index 0000000..0ae7753 --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/event/syscalls.rs @@ -0,0 +1,152 @@ +//! linux_raw syscalls supporting `rustix::event`. +//! +//! # Safety +//! +//! See the `rustix::backend` module documentation for details. +#![allow(unsafe_code, clippy::undocumented_unsafe_blocks)] + +use crate::backend::c; +#[cfg(feature = "alloc")] +use crate::backend::conv::pass_usize; +use crate::backend::conv::{ + by_ref, c_int, c_uint, raw_fd, ret, ret_error, ret_owned_fd, ret_usize, slice_mut, zero, +}; +use crate::event::{epoll, EventfdFlags, PollFd}; +use crate::fd::{BorrowedFd, OwnedFd}; +use crate::io; +use linux_raw_sys::general::{EPOLL_CTL_ADD, EPOLL_CTL_DEL, EPOLL_CTL_MOD}; +#[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] +use { + crate::backend::conv::{opt_ref, size_of}, + linux_raw_sys::general::{__kernel_timespec, kernel_sigset_t}, +}; + +#[inline] +pub(crate) fn poll(fds: &mut [PollFd<'_>], timeout: c::c_int) -> io::Result<usize> { + let (fds_addr_mut, fds_len) = slice_mut(fds); + + #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] + unsafe { + let timeout = if timeout >= 0 { + Some(__kernel_timespec { + tv_sec: (timeout as i64) / 1000, + tv_nsec: (timeout as i64) % 1000 * 1_000_000, + }) + } else { + None + }; + ret_usize(syscall!( + __NR_ppoll, + fds_addr_mut, + fds_len, + opt_ref(timeout.as_ref()), + zero(), + size_of::<kernel_sigset_t, _>() + )) + } + #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))] + unsafe { + ret_usize(syscall!(__NR_poll, fds_addr_mut, fds_len, c_int(timeout))) + } +} + +#[inline] +pub(crate) fn epoll_create(flags: epoll::CreateFlags) -> io::Result<OwnedFd> { + unsafe { ret_owned_fd(syscall_readonly!(__NR_epoll_create1, flags)) } +} + +#[inline] +pub(crate) unsafe fn epoll_add( + epfd: BorrowedFd<'_>, + fd: c::c_int, + event: &epoll::Event, +) -> io::Result<()> { + ret(syscall_readonly!( + __NR_epoll_ctl, + epfd, + c_uint(EPOLL_CTL_ADD), + raw_fd(fd), + by_ref(event) + )) +} + +#[inline] +pub(crate) unsafe fn epoll_mod( + epfd: BorrowedFd<'_>, + fd: c::c_int, + event: &epoll::Event, +) -> io::Result<()> { + ret(syscall_readonly!( + __NR_epoll_ctl, + epfd, + c_uint(EPOLL_CTL_MOD), + raw_fd(fd), + by_ref(event) + )) +} + +#[inline] +pub(crate) unsafe fn epoll_del(epfd: BorrowedFd<'_>, fd: c::c_int) -> io::Result<()> { + ret(syscall_readonly!( + __NR_epoll_ctl, + epfd, + c_uint(EPOLL_CTL_DEL), + raw_fd(fd), + zero() + )) +} + +#[cfg(feature = "alloc")] +#[inline] +pub(crate) fn epoll_wait( + epfd: BorrowedFd<'_>, + events: *mut epoll::Event, + num_events: usize, + timeout: c::c_int, +) -> io::Result<usize> { + #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))] + unsafe { + ret_usize(syscall!( + __NR_epoll_wait, + epfd, + events, + pass_usize(num_events), + c_int(timeout) + )) + } + #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] + unsafe { + ret_usize(syscall!( + __NR_epoll_pwait, + epfd, + events, + pass_usize(num_events), + c_int(timeout), + zero() + )) + } +} + +#[inline] +pub(crate) fn eventfd(initval: u32, flags: EventfdFlags) -> io::Result<OwnedFd> { + unsafe { ret_owned_fd(syscall_readonly!(__NR_eventfd2, c_uint(initval), flags)) } +} + +#[inline] +pub(crate) fn pause() { + unsafe { + #[cfg(any(target_arch = "aarch64", target_arch = "riscv64"))] + let error = ret_error(syscall_readonly!( + __NR_ppoll, + zero(), + zero(), + zero(), + zero() + )); + + #[cfg(not(any(target_arch = "aarch64", target_arch = "riscv64")))] + let error = ret_error(syscall_readonly!(__NR_pause)); + + debug_assert_eq!(error, io::Errno::INTR); + } +} diff --git a/vendor/rustix/src/backend/linux_raw/event/types.rs b/vendor/rustix/src/backend/linux_raw/event/types.rs new file mode 100644 index 0000000..01611f6 --- /dev/null +++ b/vendor/rustix/src/backend/linux_raw/event/types.rs @@ -0,0 +1,21 @@ +use crate::backend::c; +use bitflags::bitflags; + +bitflags! { + /// `EFD_*` flags for use with [`eventfd`]. + /// + /// [`eventfd`]: crate::event::eventfd + #[repr(transparent)] + #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)] + pub struct EventfdFlags: c::c_uint { + /// `EFD_CLOEXEC` + const CLOEXEC = linux_raw_sys::general::EFD_CLOEXEC; + /// `EFD_NONBLOCK` + const NONBLOCK = linux_raw_sys::general::EFD_NONBLOCK; + /// `EFD_SEMAPHORE` + const SEMAPHORE = linux_raw_sys::general::EFD_SEMAPHORE; + + /// <https://docs.rs/bitflags/*/bitflags/#externally-defined-flags> + const _ = !0; + } +} |