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use crate::cmp;
use crate::ffi::CStr;
use crate::io;
use crate::sys::cvt;
use crate::sys::{unsupported, Void};
use crate::time::Duration;
use libc;
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 { libc::__wasi_sched_yield() };
debug_assert_eq!(ret, 0);
}
pub fn set_name(_name: &CStr) {
// nope
}
pub fn sleep(dur: Duration) {
let mut secs = dur.as_secs();
let mut nsecs = dur.subsec_nanos() as i32;
unsafe {
while secs > 0 || nsecs > 0 {
let mut ts = libc::timespec {
tv_sec: cmp::min(libc::time_t::max_value() as u64, secs) as libc::time_t,
tv_nsec: nsecs,
};
secs -= ts.tv_sec as u64;
cvt(libc::nanosleep(&ts, &mut ts)).unwrap();
nsecs = 0;
}
}
}
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 }
}
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