1 files changed, 229 insertions, 0 deletions
diff --git a/vendor/rustix/src/imp/linux_raw/time/syscalls.rs b/vendor/rustix/src/imp/linux_raw/time/syscalls.rs
new file mode 100644
index 000000000..93651e499
--- /dev/null
+++ b/vendor/rustix/src/imp/linux_raw/time/syscalls.rs
@@ -0,0 +1,229 @@
+//! linux_raw syscalls supporting `rustix::time`.
+//!
+//! # Safety
+//!
+//! See the `rustix::imp` module documentation for details.
+#![allow(unsafe_code)]
+#![allow(clippy::undocumented_unsafe_blocks)]
+
+#[cfg(feature = "time")]
+use super::super::conv::{by_ref, ret_owned_fd};
+use super::super::conv::{ret, ret_infallible};
+use super::types::ClockId;
+#[cfg(feature = "time")]
+use crate::fd::BorrowedFd;
+use crate::io;
+#[cfg(feature = "time")]
+use crate::io::OwnedFd;
+#[cfg(feature = "time")]
+use crate::time::{Itimerspec, TimerfdClockId, TimerfdFlags, TimerfdTimerFlags};
+use core::mem::MaybeUninit;
+use linux_raw_sys::general::__kernel_timespec;
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+use {core::convert::TryInto, linux_raw_sys::general::itimerspec as __kernel_old_itimerspec};
+#[cfg(target_pointer_width = "32")]
+use {core::ptr, linux_raw_sys::general::timespec as __kernel_old_timespec};
+
+// `clock_gettime` has special optimizations via the vDSO.
+#[cfg(feature = "time")]
+pub(crate) use super::super::vdso_wrappers::{clock_gettime, clock_gettime_dynamic};
+
+#[inline]
+pub(crate) fn clock_getres(which_clock: ClockId) -> __kernel_timespec {
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        let mut result = MaybeUninit::<__kernel_timespec>::uninit();
+        if let Err(err) = ret(syscall!(__NR_clock_getres_time64, which_clock, &mut result)) {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            debug_assert_eq!(err, io::Errno::NOSYS);
+            clock_getres_old(which_clock, &mut result);
+        }
+        result.assume_init()
+    }
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        let mut result = MaybeUninit::<__kernel_timespec>::uninit();
+        ret_infallible(syscall!(__NR_clock_getres, which_clock, &mut result));
+        result.assume_init()
+    }
+}
+
+#[cfg(target_pointer_width = "32")]
+unsafe fn clock_getres_old(which_clock: ClockId, result: &mut MaybeUninit<__kernel_timespec>) {
+    let mut old_result = MaybeUninit::<__kernel_old_timespec>::uninit();
+    ret_infallible(syscall!(__NR_clock_getres, which_clock, &mut old_result));
+    let old_result = old_result.assume_init();
+    // TODO: With Rust 1.55, we can use MaybeUninit::write here.
+    ptr::write(
+        result.as_mut_ptr(),
+        __kernel_timespec {
+            tv_sec: old_result.tv_sec.into(),
+            tv_nsec: old_result.tv_nsec.into(),
+        },
+    );
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn timerfd_create(clockid: TimerfdClockId, flags: TimerfdFlags) -> io::Result<OwnedFd> {
+    unsafe { ret_owned_fd(syscall!(__NR_timerfd_create, clockid, flags)) }
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn timerfd_settime(
+    fd: BorrowedFd<'_>,
+    flags: TimerfdTimerFlags,
+    new_value: &Itimerspec,
+) -> io::Result<Itimerspec> {
+    let mut result = MaybeUninit::<Itimerspec>::uninit();
+
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall!(
+            __NR_timerfd_settime,
+            fd,
+            flags,
+            by_ref(new_value),
+            &mut result
+        ))
+        .map(|()| result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(
+            __NR_timerfd_settime64,
+            fd,
+            flags,
+            by_ref(new_value),
+            &mut result
+        ))
+        .or_else(|err| {
+            // See the comments in `rustix_clock_gettime_via_syscall` about
+            // emulation.
+            if err == io::Errno::NOSYS {
+                timerfd_settime_old(fd, flags, new_value, &mut result)
+            } else {
+                Err(err)
+            }
+        })
+        .map(|()| result.assume_init())
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn timerfd_settime_old(
+    fd: BorrowedFd<'_>,
+    flags: TimerfdTimerFlags,
+    new_value: &Itimerspec,
+    result: &mut MaybeUninit<Itimerspec>,
+) -> io::Result<()> {
+    let mut old_result = MaybeUninit::<__kernel_old_itimerspec>::uninit();
+
+    // Convert `new_value` to the old `__kernel_old_itimerspec` format.
+    let old_new_value = __kernel_old_itimerspec {
+        it_interval: __kernel_old_timespec {
+            tv_sec: new_value
+                .it_interval
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: new_value
+                .it_interval
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+        it_value: __kernel_old_timespec {
+            tv_sec: new_value
+                .it_value
+                .tv_sec
+                .try_into()
+                .map_err(|_| io::Errno::OVERFLOW)?,
+            tv_nsec: new_value
+                .it_value
+                .tv_nsec
+                .try_into()
+                .map_err(|_| io::Errno::INVAL)?,
+        },
+    };
+    ret(syscall!(
+        __NR_timerfd_settime,
+        fd,
+        flags,
+        by_ref(&old_new_value),
+        &mut old_result
+    ))?;
+    let old_result = old_result.assume_init();
+    // TODO: With Rust 1.55, we can use MaybeUninit::write here.
+    ptr::write(
+        result.as_mut_ptr(),
+        Itimerspec {
+            it_interval: __kernel_timespec {
+                tv_sec: old_result.it_interval.tv_sec.into(),
+                tv_nsec: old_result.it_interval.tv_nsec.into(),
+            },
+            it_value: __kernel_timespec {
+                tv_sec: old_result.it_value.tv_sec.into(),
+                tv_nsec: old_result.it_value.tv_nsec.into(),
+            },
+        },
+    );
+    Ok(())
+}
+
+#[cfg(feature = "time")]
+#[inline]
+pub(crate) fn timerfd_gettime(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> {
+    let mut result = MaybeUninit::<Itimerspec>::uninit();
+
+    #[cfg(target_pointer_width = "64")]
+    unsafe {
+        ret(syscall!(__NR_timerfd_gettime, fd, &mut result)).map(|()| result.assume_init())
+    }
+
+    #[cfg(target_pointer_width = "32")]
+    unsafe {
+        ret(syscall!(__NR_timerfd_gettime64, fd, &mut result))
+            .or_else(|err| {
+                // See the comments in `rustix_clock_gettime_via_syscall` about
+                // emulation.
+                if err == io::Errno::NOSYS {
+                    timerfd_gettime_old(fd, &mut result)
+                } else {
+                    Err(err)
+                }
+            })
+            .map(|()| result.assume_init())
+    }
+}
+
+#[cfg(feature = "time")]
+#[cfg(target_pointer_width = "32")]
+unsafe fn timerfd_gettime_old(
+    fd: BorrowedFd<'_>,
+    result: &mut MaybeUninit<Itimerspec>,
+) -> io::Result<()> {
+    let mut old_result = MaybeUninit::<__kernel_old_itimerspec>::uninit();
+    ret(syscall!(__NR_timerfd_gettime, fd, &mut old_result))?;
+    let old_result = old_result.assume_init();
+    // TODO: With Rust 1.55, we can use MaybeUninit::write here.
+    ptr::write(
+        result.as_mut_ptr(),
+        Itimerspec {
+            it_interval: __kernel_timespec {
+                tv_sec: old_result.it_interval.tv_sec.into(),
+                tv_nsec: old_result.it_interval.tv_nsec.into(),
+            },
+            it_value: __kernel_timespec {
+                tv_sec: old_result.it_value.tv_sec.into(),
+                tv_nsec: old_result.it_value.tv_nsec.into(),
+            },
+        },
+    );
+    Ok(())
+}