Jeremy Soller
48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
use time;
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use context;
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use syscall::data::TimeSpec;
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use syscall::error::*;
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use syscall::flag::{CLOCK_REALTIME, CLOCK_MONOTONIC};
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pub fn clock_gettime(clock: usize, time: &mut TimeSpec) -> Result<usize> {
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let arch_time = match clock {
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CLOCK_REALTIME => time::realtime(),
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CLOCK_MONOTONIC => time::monotonic(),
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_ => return Err(Error::new(EINVAL))
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};
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time.tv_sec = arch_time.0 as i64;
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time.tv_nsec = arch_time.1 as i32;
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Ok(0)
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}
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pub fn nanosleep(req: &TimeSpec, rem_opt: Option<&mut TimeSpec>) -> Result<usize> {
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let start = time::monotonic();
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let sum = start.1 + req.tv_nsec as u64;
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let end = (start.0 + req.tv_sec as u64 + sum / 1000000000, sum % 1000000000);
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{
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let contexts = context::contexts();
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let context_lock = contexts.current().ok_or(Error::new(ESRCH))?;
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let mut context = context_lock.write();
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context.wake = Some(end);
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context.block();
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}
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unsafe { context::switch(); }
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if let Some(mut rem) = rem_opt {
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//TODO let current = time::monotonic();
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rem.tv_sec = 0;
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rem.tv_nsec = 0;
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}
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Ok(0)
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}
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pub fn sched_yield() -> Result<usize> {
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unsafe { context::switch(); }
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Ok(0)
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}
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