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//! `Timespec` and related types, which are used by multiple public API
//! modules.
use crate::backend::c;
/// `struct timespec`
#[cfg(not(all(
libc,
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
)))]
pub type Timespec = c::timespec;
/// `struct timespec`
#[cfg(all(
libc,
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
))]
#[derive(Debug, Clone, Copy)]
#[repr(C)]
pub struct Timespec {
/// Seconds.
pub tv_sec: Secs,
/// Nanoseconds. Must be less than 1_000_000_000.
pub tv_nsec: Nsecs,
}
/// A type for the `tv_sec` field of [`Timespec`].
#[cfg(not(all(
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
)))]
#[allow(deprecated)]
pub type Secs = c::time_t;
/// A type for the `tv_sec` field of [`Timespec`].
#[cfg(all(
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
))]
pub type Secs = i64;
/// A type for the `tv_nsec` field of [`Timespec`].
#[cfg(all(libc, target_arch = "x86_64", target_pointer_width = "32"))]
pub type Nsecs = i64;
/// A type for the `tv_nsec` field of [`Timespec`].
#[cfg(all(libc, not(all(target_arch = "x86_64", target_pointer_width = "32"))))]
pub type Nsecs = c::c_long;
/// A type for the `tv_nsec` field of [`Timespec`].
#[cfg(linux_raw)]
pub type Nsecs = i64;
/// On 32-bit glibc platforms, `timespec` has anonymous padding fields, which
/// Rust doesn't support yet (see `unnamed_fields`), so we define our own
/// struct with explicit padding, with bidirectional `From` impls.
#[cfg(all(
libc,
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
))]
#[repr(C)]
#[derive(Debug, Clone)]
pub(crate) struct LibcTimespec {
pub(crate) tv_sec: Secs,
#[cfg(target_endian = "big")]
padding: core::mem::MaybeUninit<u32>,
pub(crate) tv_nsec: Nsecs,
#[cfg(target_endian = "little")]
padding: core::mem::MaybeUninit<u32>,
}
#[cfg(all(
libc,
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
))]
impl From<LibcTimespec> for Timespec {
#[inline]
fn from(t: LibcTimespec) -> Self {
Self {
tv_sec: t.tv_sec,
tv_nsec: t.tv_nsec,
}
}
}
#[cfg(all(
libc,
any(target_arch = "arm", target_arch = "mips", target_arch = "x86"),
target_env = "gnu",
))]
impl From<Timespec> for LibcTimespec {
#[inline]
fn from(t: Timespec) -> Self {
Self {
tv_sec: t.tv_sec,
tv_nsec: t.tv_nsec,
padding: core::mem::MaybeUninit::uninit(),
}
}
}
|
