pw_thread/rust/pw_thread_backend_std.rs

// Copyright 2026 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#![no_std]

extern crate core;
extern crate std;

use pw_time::{Clock, Duration, Instant, SystemClock};

pub fn sleep(sleep_duration: Duration<SystemClock>) {
    let nanos = sleep_duration.ticks().cast_unsigned();
    std::thread::sleep(core::time::Duration::from_nanos(nanos));
}

pub fn sleep_until(wakeup_time: Instant<SystemClock>) {
    let now = SystemClock::now();
    if wakeup_time <= now {
        return;
    }
    let duration = wakeup_time - now;
    sleep(duration);
}

pub fn yield_now() {
    std::thread::yield_now();
}