4 use crate::sys::{unsupported, Void};
5 use crate::time::Duration;
7 pub struct Thread(Void);
9 pub const DEFAULT_MIN_STACK_SIZE: usize = 4096;
12 // unsafe: see thread::Builder::spawn_unchecked for safety requirements
13 pub unsafe fn new(_stack: usize, _p: Box<dyn FnOnce()>) -> io::Result<Thread> {
18 let ret = unsafe { wasi::sched_yield() };
19 debug_assert_eq!(ret, Ok(()));
22 pub fn set_name(_name: &CStr) {
26 pub fn sleep(dur: Duration) {
27 let nanos = dur.as_nanos();
28 assert!(nanos <= u64::MAX as u128);
30 const USERDATA: wasi::Userdata = 0x0123_45678;
32 let clock = wasi::SubscriptionClock {
33 id: wasi::CLOCKID_MONOTONIC,
34 timeout: nanos as u64,
39 let in_ = wasi::Subscription {
41 r#type: wasi::EVENTTYPE_CLOCK,
42 u: wasi::SubscriptionU { clock },
45 let mut event: wasi::Event = mem::zeroed();
46 let res = wasi::poll_oneoff(&in_, &mut event, 1);
51 userdata: USERDATA, error: 0, r#type: wasi::EVENTTYPE_CLOCK, ..
54 _ => panic!("thread::sleep(): unexpected result of poll_oneoff"),
66 pub unsafe fn current() -> Option<Guard> {
69 pub unsafe fn init() -> Option<Guard> {