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Support wait_interruptible with SigQueueObserver

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This commit is contained in:
Jianfeng Jiang
2023-09-26 17:14:21 +08:00
committed by Tate, Hongliang Tian
parent ec857e5205
commit d2aa06cbe2
9 changed files with 270 additions and 68 deletions
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33
services/libs/jinux-std/src/syscall/pause.rs
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@ -1,20 +1,21 @@
use crate::{prelude::*, process::posix_thread::PosixThreadExt, thread::Thread};
use crate::log_syscall_entry;
use crate::prelude::*;
use crate::process::signal::sig_mask::SigMask;
use crate::process::signal::SigQueueObserver;
use super::SyscallReturn;
use super::{SyscallReturn, SYS_PAUSE};
pub fn sys_pause() -> Result<SyscallReturn> {
loop {
let current_thread = current_thread!();
// check sig_queue of current thread and process,
// if there's any pending signal, break loop
let posix_thread = current_thread.as_posix_thread().unwrap();
if posix_thread.has_pending_signal() || current!().has_pending_signal() {
break;
}
// there's no pending signal, yield execution
// FIXME: set current thread interruptible here
Thread::yield_now();
}
// handle signal before returning to user space
return_errno_with_message!(Errno::ERESTART, "catch signal")
log_syscall_entry!(SYS_PAUSE);
let sigqueue_observer = {
// FIXME: like sleep, paused thread can only be interrupted by signals that will call signal
// handler or terminate current process
let sigmask = SigMask::new_full();
SigQueueObserver::new(sigmask)
};
sigqueue_observer.wait_until_interruptible(|| None, None)?;
unreachable!("[Internal Error] pause should always return EINTR");
}