4lDO2
26 lines
697 B
Rust
26 lines
697 B
Rust
use spin::Mutex;
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use crate::syscall::error::{Error, Result, EINVAL};
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pub const NANOS_PER_SEC: u128 = 1_000_000_000;
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// TODO: seqlock?
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/// Kernel start time, measured in nanoseconds since Unix epoch
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pub static START: Mutex<u128> = Mutex::new(0);
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/// Kernel up time, measured in nanoseconds since `START_TIME`
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pub static OFFSET: Mutex<u128> = Mutex::new(0);
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pub fn monotonic() -> u128 {
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crate::arch::time::monotonic_absolute()
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}
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pub fn realtime() -> u128 {
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*START.lock() + monotonic()
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}
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pub fn sys_update_time_offset(buf: &[u8]) -> Result<usize> {
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let start = <[u8; 16]>::try_from(buf).map_err(|_| Error::new(EINVAL))?;
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*START.lock() = u128::from_ne_bytes(start);
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Ok(16)
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}
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