18 lines
541 B
Rust
18 lines
541 B
Rust
use spin::Mutex;
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/// Kernel start time, measured in (seconds, nanoseconds) since Unix epoch
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pub static START: Mutex<(u64, u64)> = Mutex::new((0, 0));
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/// Kernel up time, measured in (seconds, nanoseconds) since `START_TIME`
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pub static OFFSET: Mutex<(u64, u64)> = Mutex::new((0, 0));
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pub fn monotonic() -> (u64, u64) {
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*OFFSET.lock()
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}
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pub fn realtime() -> (u64, u64) {
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let offset = monotonic();
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let start = *START.lock();
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let sum = start.1 + offset.1;
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(start.0 + offset.0 + sum / 1_000_000_000, sum % 1_000_000_000)
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}
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