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Added table containing the system calls used by Instant and SystemTime.

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Christian 2019-08-24 14:49:17 +02:00
parent 478464570e
commit 33788c252c
1 changed files with 30 additions and 0 deletions
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src/libstd/time.rs
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@ -59,6 +59,21 @@ pub use core::time::Duration;
/// println!("{}", now.elapsed().as_secs());
/// }
/// ```
///
/// # Underlying System calls
/// Currently, the following system calls are being used to get the current time using `now()`:
///
/// | Platform | System call |
/// |:---------:|:------------------------------------------------:|
/// | Cloud ABI | [clock_time_get (Monotonic Clock)](https://github.com/NuxiNL/cloudabi/blob/master/cloudabi.txt) |
/// | SGX | Not implemented |
/// | UNIX | [mach_absolute_time](https://developer.apple.com/library/archive/documentation/Darwin/Conceptual/KernelProgramming/services/services.html) |
/// | VXWorks | [clock_gettime (Monotonic Clock)](https://linux.die.net/man/3/clock_gettime) |
/// | WASI | [__wasi_clock_time_get (Monotonic Clock)](https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-api.md#clock_time_get) |
/// | Windows | [QueryPerformanceCounter](https://docs.microsoft.com/en-us/windows/win32/api/profileapi/nf-profileapi-queryperformancecounter) |
///
/// **Disclaimer:** These system calls might change over time.
///
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[stable(feature = "time2", since = "1.8.0")]
pub struct Instant(time::Instant);
@ -114,6 +129,21 @@ pub struct Instant(time::Instant);
/// }
/// }
/// ```
///
/// # Underlying System calls
/// Currently, the following system calls are being used to get the current time using `now()`:
///
/// | Platform | System call |
/// |:---------:|:------------------------------------------------:|
/// | Cloud ABI | [clock_time_get (Realtime Clock)](https://github.com/NuxiNL/cloudabi/blob/master/cloudabi.txt) |
/// | SGX | Not implemented |
/// | UNIX | [gettimeofday](http://man7.org/linux/man-pages/man2/gettimeofday.2.html) |
/// | VXWorks | [clock_gettime (Realtime Clock)](https://linux.die.net/man/3/clock_gettime) |
/// | WASI | [__wasi_clock_time_get (Realtime Clock)](https://github.com/CraneStation/wasmtime/blob/master/docs/WASI-api.md#clock_time_get) |
/// | Windows | [GetSystemTimeAsFileTime](https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsystemtimeasfiletime) |
///
/// **Disclaimer:** These system calls might change over time.
///
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[stable(feature = "time2", since = "1.8.0")]
pub struct SystemTime(time::SystemTime);