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Re-implement the alarm syscall

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This commit is contained in:
Chen Chengjun
2024-04-30 11:23:19 +08:00
committed by Tate, Hongliang Tian
parent b226928349
commit 2d17177cb5
6 changed files with 82 additions and 176 deletions
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19
kernel/aster-nix/src/syscall/alarm.rs
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@ -3,26 +3,27 @@
use core::time::Duration;
use super::SyscallReturn;
use crate::{prelude::*, process::posix_thread::PosixThreadExt};
use crate::prelude::*;
pub fn sys_alarm(seconds: u32) -> Result<SyscallReturn> {
debug!("seconds = {}", seconds);
let current_thread = current_thread!();
let mut real_timer = {
let posix_thread = current_thread.as_posix_thread().unwrap();
posix_thread.real_timer().lock()
};
let current = current!();
let alarm_timer = current.alarm_timer();
let remaining_secs = real_timer.remain().as_secs();
let remaining = alarm_timer.remain();
let mut remaining_secs = remaining.as_secs();
if remaining.subsec_nanos() > 0 {
remaining_secs += 1;
}
if seconds == 0 {
// Clear previous timer
real_timer.clear();
alarm_timer.cancel();
return Ok(SyscallReturn::Return(remaining_secs as _));
}
real_timer.set(Duration::from_secs(seconds as u64))?;
alarm_timer.set_timeout(Duration::from_secs(seconds as u64));
Ok(SyscallReturn::Return(remaining_secs as _))
}