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    // Copyright 2016 Amanieu d'Antras
    //
    // Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
    // http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
    // http://opensource.org/licenses/MIT>, at your option. This file may not be
    // copied, modified, or distributed except according to those terms.

    use crate::raw_mutex::RawMutex;
    use lock_api::RawMutexFair;

    /// Raw fair mutex type backed by the parking lot.
    pub struct RawFairMutex(RawMutex);

    unsafe impl lock_api::RawMutex for RawFairMutex {
        const INIT: Self = RawFairMutex(<RawMutex as lock_api::RawMutex>::INIT);

        type GuardMarker = <RawMutex as lock_api::RawMutex>::GuardMarker;

        #[inline]
        fn lock(&self) {
            self.0.lock()
        }

        #[inline]
        fn try_lock(&self) -> bool {
            self.0.try_lock()
        }

        #[inline]
        unsafe fn unlock(&self) {
            self.unlock_fair()
        }

        #[inline]
        fn is_locked(&self) -> bool {
            self.0.is_locked()
        }
    }

    unsafe impl lock_api::RawMutexFair for RawFairMutex {
        #[inline]
        unsafe fn unlock_fair(&self) {
            self.0.unlock_fair()
        }

        #[inline]
        unsafe fn bump(&self) {
            self.0.bump()
        }
    }

    unsafe impl lock_api::RawMutexTimed for RawFairMutex {
        type Duration = <RawMutex as lock_api::RawMutexTimed>::Duration;
        type Instant = <RawMutex as lock_api::RawMutexTimed>::Instant;

        #[inline]
        fn try_lock_until(&self, timeout: Self::Instant) -> bool {
            self.0.try_lock_until(timeout)
        }

        #[inline]
        fn try_lock_for(&self, timeout: Self::Duration) -> bool {
            self.0.try_lock_for(timeout)
        }
    }