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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.

    //! This library provides implementations of `Mutex`, `RwLock`, `Condvar` and
    //! `Once` that are smaller, faster and more flexible than those in the Rust
    //! standard library. It also provides a `ReentrantMutex` type.

    #![warn(missing_docs)]
    #![warn(rust_2018_idioms)]
    #![cfg_attr(feature = "nightly", feature(llvm_asm))]

    mod condvar;
    mod elision;
    mod fair_mutex;
    mod mutex;
    mod once;
    mod raw_fair_mutex;
    mod raw_mutex;
    mod raw_rwlock;
    mod remutex;
    mod rwlock;
    mod util;

    #[cfg(feature = "deadlock_detection")]
    pub mod deadlock;
    #[cfg(not(feature = "deadlock_detection"))]
    mod deadlock;

    // If deadlock detection is enabled, we cannot allow lock guards to be sent to
    // other threads.
    #[cfg(all(feature = "send_guard", feature = "deadlock_detection"))]
    compile_error!("the `send_guard` and `deadlock_detection` features cannot be used together");
    #[cfg(feature = "send_guard")]
    type GuardMarker = lock_api::GuardSend;
    #[cfg(not(feature = "send_guard"))]
    type GuardMarker = lock_api::GuardNoSend;

    pub use self::condvar::{Condvar, WaitTimeoutResult};
    pub use self::fair_mutex::{const_fair_mutex, FairMutex, FairMutexGuard, MappedFairMutexGuard};
    pub use self::mutex::{const_mutex, MappedMutexGuard, Mutex, MutexGuard};
    pub use self::once::{Once, OnceState};
    pub use self::raw_fair_mutex::RawFairMutex;
    pub use self::raw_mutex::RawMutex;
    pub use self::raw_rwlock::RawRwLock;
    pub use self::remutex::{
        const_reentrant_mutex, MappedReentrantMutexGuard, RawThreadId, ReentrantMutex,
        ReentrantMutexGuard,
    };
    pub use self::rwlock::{
        const_rwlock, MappedRwLockReadGuard, MappedRwLockWriteGuard, RwLock, RwLockReadGuard,
        RwLockUpgradableReadGuard, RwLockWriteGuard,
    };
    pub use ::lock_api;