Wildan M
37 lines
1.0 KiB
Rust
37 lines
1.0 KiB
Rust
use crate::{
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sync::{CleanLockToken, Mutex, RwLock, L1},
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syscall::error::{Error, Result, EINVAL},
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};
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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<L1, u128> = Mutex::new(0);
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/// Kernel up time, measured in nanoseconds since `START_TIME`
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pub static OFFSET: RwLock<L1, u128> = RwLock::new(0);
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pub fn monotonic(token: &mut CleanLockToken) -> u128 {
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crate::arch::time::monotonic_absolute(token)
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}
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pub fn realtime(token: &mut CleanLockToken) -> u128 {
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let start = { *START.lock(token.token()) };
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let offset = { monotonic(token) };
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start + offset
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}
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pub fn monotonic_resolution() -> u128 {
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crate::arch::time::monotonic_resolution()
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}
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pub fn realtime_resolution() -> u128 {
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monotonic_resolution()
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}
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pub fn sys_update_time_offset(buf: &[u8], token: &mut CleanLockToken) -> Result<usize> {
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let start = <[u8; 16]>::try_from(buf).map_err(|_| Error::new(EINVAL))?;
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*START.lock(token.token()) = u128::from_ne_bytes(start);
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Ok(16)
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}
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