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// Copyright 2016 Amanieu d'Antras
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// copied, modified, or distributed except according to those terms.
//! The wasm platform can't park when atomic support is not available.
//! So this ThreadParker just panics on any attempt to park.
use std::thread;
use std::time::Instant;
pub struct ThreadParker(());
impl super::ThreadParkerT for ThreadParker {
type UnparkHandle = UnparkHandle;
const IS_CHEAP_TO_CONSTRUCT: bool = true;
fn new() -> ThreadParker {
ThreadParker(())
}
unsafe fn prepare_park(&self) {
panic!("Parking not supported on this platform");
}
unsafe fn timed_out(&self) -> bool {
panic!("Parking not supported on this platform");
}
unsafe fn park(&self) {
panic!("Parking not supported on this platform");
}
unsafe fn park_until(&self, _timeout: Instant) -> bool {
panic!("Parking not supported on this platform");
}
unsafe fn unpark_lock(&self) -> UnparkHandle {
panic!("Parking not supported on this platform");
}
}
pub struct UnparkHandle(());
impl super::UnparkHandleT for UnparkHandle {
unsafe fn unpark(self) {}
}
pub fn thread_yield() {
thread::yield_now();
}