diff options
Diffstat (limited to 'library/std/src')
| -rw-r--r-- | library/std/src/sys/unix/time.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/library/std/src/sys/unix/time.rs b/library/std/src/sys/unix/time.rs index 6cf06848399..20d061206be 100644 --- a/library/std/src/sys/unix/time.rs +++ b/library/std/src/sys/unix/time.rs @@ -339,6 +339,33 @@ mod inner { impl Timespec { pub fn now(clock: clock_t) -> Timespec { + // Try to use 64-bit time in preparation for Y2038. + #[cfg(all(target_os = "linux", target_env = "gnu", target_pointer_width = "32"))] + { + 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, + } + + 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 { tv_sec: t.tv_sec, tv_nsec: t.tv_nsec as i64 }; + } + } + let mut t = MaybeUninit::uninit(); cvt(unsafe { libc::clock_gettime(clock, t.as_mut_ptr()) }).unwrap(); Timespec::from(unsafe { t.assume_init() }) |