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#![allow(dead_code)]
use super::unsupported;
use crate::ffi::CStr;
use crate::io;
use crate::mem;
use crate::num::NonZeroUsize;
use crate::ptr;
use crate::sys::hermit::abi;
use crate::sys::hermit::thread_local_dtor::run_dtors;
use crate::time::Duration;
pub type Tid = abi::Tid;
pub struct Thread {
tid: Tid,
}
unsafe impl Send for Thread {}
unsafe impl Sync for Thread {}
pub const DEFAULT_MIN_STACK_SIZE: usize = 1 << 20;
impl Thread {
pub unsafe fn new_with_coreid(
stack: usize,
p: Box<dyn FnOnce()>,
core_id: isize,
) -> io::Result<Thread> {
let p = Box::into_raw(Box::new(p));
let tid = abi::spawn2(
thread_start,
p.expose_addr(),
abi::Priority::into(abi::NORMAL_PRIO),
stack,
core_id,
);
return if tid == 0 {
// The thread failed to start and as a result p was not consumed. Therefore, it is
// safe to reconstruct the box so that it gets deallocated.
drop(Box::from_raw(p));
Err(io::const_io_error!(io::ErrorKind::Uncategorized, "Unable to create thread!"))
} else {
Ok(Thread { tid: tid })
};
extern "C" fn thread_start(main: usize) {
unsafe {
// Finally, let's run some code.
Box::from_raw(ptr::from_exposed_addr::<Box<dyn FnOnce()>>(main).cast_mut())();
// run all destructors
run_dtors();
}
}
}
pub unsafe fn new(stack: usize, p: Box<dyn FnOnce()>) -> io::Result<Thread> {
Thread::new_with_coreid(stack, p, -1 /* = no specific core */)
}
#[inline]
pub fn yield_now() {
unsafe {
abi::yield_now();
}
}
#[inline]
pub fn set_name(_name: &CStr) {
// nope
}
#[inline]
pub fn sleep(dur: Duration) {
unsafe {
abi::usleep(dur.as_micros() as u64);
}
}
pub fn join(self) {
unsafe {
let _ = abi::join(self.tid);
}
}
#[inline]
pub fn id(&self) -> Tid {
self.tid
}
#[inline]
pub fn into_id(self) -> Tid {
let id = self.tid;
mem::forget(self);
id
}
}
pub fn available_parallelism() -> io::Result<NonZeroUsize> {
unsupported()
}
pub mod guard {
pub type Guard = !;
pub unsafe fn current() -> Option<Guard> {
None
}
pub unsafe fn init() -> Option<Guard> {
None
}
}
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