Peter Limkilde Svendsen
137 lines
3.4 KiB
Rust
137 lines
3.4 KiB
Rust
//! `sys/epoll.h` implementation.
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//!
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//! Non-POSIX, see <http://man7.org/linux/man-pages/man7/epoll.7.html>.
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use core::ptr;
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use crate::{
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error::ResultExt,
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header::signal::sigset_t,
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platform::{
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PalEpoll, Sys,
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types::{c_int, c_void},
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},
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};
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pub use self::sys::*;
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#[cfg(target_os = "linux")]
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#[path = "linux.rs"]
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pub mod sys;
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#[cfg(target_os = "redox")]
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#[path = "redox.rs"]
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pub mod sys;
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pub const EPOLL_CTL_ADD: c_int = 1;
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pub const EPOLL_CTL_DEL: c_int = 2;
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pub const EPOLL_CTL_MOD: c_int = 3;
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man3/epoll_event.3type.html>.
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#[repr(C)]
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#[derive(Clone, Copy)]
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pub union epoll_data {
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pub ptr: *mut c_void,
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pub fd: c_int,
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pub u32: u32,
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pub u64: u64,
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}
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impl Default for epoll_data {
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fn default() -> Self {
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Self { u64: 0 }
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}
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man3/epoll_event.3type.html>.
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#[cfg(all(target_os = "redox", target_pointer_width = "64"))]
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#[repr(C)]
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#[derive(Clone, Copy, Default)]
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// This will match in size with syscall::Event (24 bytes on 64-bit
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// systems) on redox. The `Default` trait is here so we don't need to
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// worry about the padding when using this type.
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pub struct epoll_event {
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pub events: u32, // 4 bytes
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// 4 automatic alignment bytes
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pub data: epoll_data, // 8 bytes
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pub _pad: u64, // 8 bytes
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man3/epoll_event.3type.html>.
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#[cfg(not(all(target_os = "redox", target_pointer_width = "64")))]
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#[repr(C)]
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#[derive(Clone, Copy, Default)]
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pub struct epoll_event {
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pub events: u32,
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pub data: epoll_data,
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man2/epoll_create.2.html>.
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#[unsafe(no_mangle)]
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pub extern "C" fn epoll_create(_size: c_int) -> c_int {
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epoll_create1(0)
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man2/epoll_create1.2.html>.
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#[unsafe(no_mangle)]
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pub extern "C" fn epoll_create1(flags: c_int) -> c_int {
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trace_expr!(
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Sys::epoll_create1(flags).or_minus_one_errno(),
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"epoll_create1({:#x})",
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flags
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)
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man2/epoll_ctl.2.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn epoll_ctl(
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epfd: c_int,
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op: c_int,
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fd: c_int,
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event: *mut epoll_event,
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) -> c_int {
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trace_expr!(
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unsafe { Sys::epoll_ctl(epfd, op, fd, event) }
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.map(|()| 0)
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.or_minus_one_errno(),
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"epoll_ctl({}, {}, {}, {:p})",
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epfd,
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op,
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fd,
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event
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)
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man2/epoll_wait.2.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn epoll_wait(
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epfd: c_int,
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events: *mut epoll_event,
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maxevents: c_int,
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timeout: c_int,
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) -> c_int {
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unsafe { epoll_pwait(epfd, events, maxevents, timeout, ptr::null()) }
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}
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/// Non-POSIX, see <https://man7.org/linux/man-pages/man2/epoll_wait.2.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn epoll_pwait(
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epfd: c_int,
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events: *mut epoll_event,
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maxevents: c_int,
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timeout: c_int,
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sigmask: *const sigset_t,
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) -> c_int {
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trace_expr!(
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unsafe { Sys::epoll_pwait(epfd, events, maxevents, timeout, sigmask) }
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.map(|e| e as c_int)
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.or_minus_one_errno(),
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"epoll_pwait({}, {:p}, {}, {}, {:p})",
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epfd,
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events,
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maxevents,
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timeout,
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sigmask
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)
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}
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