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|
//! linux_raw syscalls supporting `rustix::event`.
//!
//! # Safety
//!
//! See the `rustix::backend` module documentation for details.
#![allow(unsafe_code)]
#![allow(clippy::undocumented_unsafe_blocks)]
use crate::backend::c;
use crate::backend::conv::{
by_ref, c_int, c_uint, pass_usize, raw_fd, ret, 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()
))
}
#[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)) }
}
|
