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Rollup merge of #109784 - beetrees:riscv32-time64, r=cuviper

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Refactor glibc time64 support, riscv32 always has 64-bit `time_t`

Refactor existing support for 64-bit `time_t` on 32-bit glibc platforms, as riscv32 `time_t` is 64-bit by default. Split out of #109773.
This commit is contained in:
Matthias Krüger 2023-03-31 08:03:15 +02:00 committed by GitHub
commit 0708fbf5cb
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1 changed files with 36 additions and 14 deletions
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50
library/std/src/sys/unix/time.rs
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@ -174,6 +174,34 @@ impl From<libc::timespec> for Timespec {
}
}
#[cfg(all(
target_os = "linux",
target_env = "gnu",
target_pointer_width = "32",
not(target_arch = "riscv32")
))]
#[repr(C)]
pub(in crate::sys::unix) struct __timespec64 {
pub(in crate::sys::unix) tv_sec: i64,
#[cfg(target_endian = "big")]
_padding: i32,
pub(in crate::sys::unix) tv_nsec: i32,
#[cfg(target_endian = "little")]
_padding: i32,
}
#[cfg(all(
target_os = "linux",
target_env = "gnu",
target_pointer_width = "32",
not(target_arch = "riscv32")
))]
impl From<__timespec64> for Timespec {
fn from(t: __timespec64) -> Timespec {
Timespec::new(t.tv_sec, t.tv_nsec.into())
}
}
#[cfg(any(
all(target_os = "macos", any(not(target_arch = "aarch64"))),
target_os = "ios",
@ -352,29 +380,23 @@ mod inner {
impl Timespec {
pub fn now(clock: libc::clockid_t) -> Timespec {
// Try to use 64-bit time in preparation for Y2038.
#[cfg(all(target_os = "linux", target_env = "gnu", target_pointer_width = "32"))]
#[cfg(all(
target_os = "linux",
target_env = "gnu",
target_pointer_width = "32",
not(target_arch = "riscv32")
))]
{
use crate::sys::weak::weak;
// __clock_gettime64 was added to 32-bit arches in glibc 2.34,
// and it handles both vDSO calls and ENOSYS fallbacks itself.
weak!(fn __clock_gettime64(libc::clockid_t, *mut __timespec64) -> libc::c_int);
#[repr(C)]
struct __timespec64 {
tv_sec: i64,
#[cfg(target_endian = "big")]
_padding: i32,
tv_nsec: i32,
#[cfg(target_endian = "little")]
_padding: i32,
}
weak!(fn __clock_gettime64(libc::clockid_t, *mut super::__timespec64) -> libc::c_int);
if let Some(clock_gettime64) = __clock_gettime64.get() {
let mut t = MaybeUninit::uninit();
cvt(unsafe { clock_gettime64(clock, t.as_mut_ptr()) }).unwrap();
let t = unsafe { t.assume_init() };
return Timespec::new(t.tv_sec, t.tv_nsec as i64);
return Timespec::from(unsafe { t.assume_init() });
}
}