| use crate::ffi::CStr; |
| use crate::io; |
| use crate::mem; |
| use crate::sys::{unsupported, Void}; |
| use crate::time::Duration; |
| |
| pub struct Thread(Void); |
| |
| pub const DEFAULT_MIN_STACK_SIZE: usize = 4096; |
| |
| impl Thread { |
| // unsafe: see thread::Builder::spawn_unchecked for safety requirements |
| pub unsafe fn new(_stack: usize, _p: Box<dyn FnOnce()>) -> io::Result<Thread> { |
| unsupported() |
| } |
| |
| pub fn yield_now() { |
| let ret = unsafe { wasi::sched_yield() }; |
| debug_assert_eq!(ret, Ok(())); |
| } |
| |
| pub fn set_name(_name: &CStr) { |
| // nope |
| } |
| |
| pub fn sleep(dur: Duration) { |
| let nanos = dur.as_nanos(); |
| assert!(nanos <= u64::max_value() as u128); |
| |
| const USERDATA: wasi::Userdata = 0x0123_45678; |
| |
| let clock = wasi::SubscriptionClock { |
| id: wasi::CLOCKID_MONOTONIC, |
| timeout: nanos as u64, |
| precision: 0, |
| flags: 0, |
| }; |
| |
| let in_ = wasi::Subscription { |
| userdata: USERDATA, |
| r#type: wasi::EVENTTYPE_CLOCK, |
| u: wasi::SubscriptionU { clock }, |
| }; |
| unsafe { |
| let mut event: wasi::Event = mem::zeroed(); |
| let res = wasi::poll_oneoff(&in_, &mut event, 1); |
| match (res, event) { |
| ( |
| Ok(1), |
| wasi::Event { |
| userdata: USERDATA, error: 0, r#type: wasi::EVENTTYPE_CLOCK, .. |
| }, |
| ) => {} |
| _ => panic!("thread::sleep(): unexpected result of poll_oneoff"), |
| } |
| } |
| } |
| |
| pub fn join(self) { |
| match self.0 {} |
| } |
| } |
| |
| pub mod guard { |
| pub type Guard = !; |
| pub unsafe fn current() -> Option<Guard> { |
| None |
| } |
| pub unsafe fn init() -> Option<Guard> { |
| None |
| } |
| } |