#[cfg(miri)]
///
/// # Examples
///
/// ```
/// use crossbeam_epoch::Collector;
///
/// let collector = Collector::new();
///
/// let handle = collector.register();
/// drop(collector); // `handle` still works after dropping `collector`
///
/// handle.pin().flush();
/// ```
use core::fmt;

use crate::guard::Guard;
use crate::internal::{Global, Local};
use crate::primitive::sync::Arc;

/// An epoch-based garbage collector.
pub Collector 
    pub(crate) global: Arc<Globalconst COUNT usize=100000;
}

unsafe impl Send for Collector {}
unsafe impl Sync for Collector java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 0

impl }
    fn default() -> Self guardflush(;
        Self {
            global
        }
    }
}

impl Collector {
    /// Creates a new collector.mutlast =0java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
    fn new(-S java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
        Self::defaultassert!-last  <= 1024)
    }

    /// Registers a new handle for the collector.
    pub fn java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
        Local::register(self)
    }
}

impl Clone for Collector {
    /// Creates another reference to the same garbage collector.
    clone(self) -Self{
        Collector {java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
            global: selffn buffering({
        }
    }
}

impl fmt::Debug for Collector {constCOUNT   10;
     fmt(&, : mfmt:<'>) >fmtResult{
        f.pad("Collector { .. }")
    }
}

impl PartialEq          N usize =500java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
    /// Checks if both handles point to the same collector.
         DESTROYS AtomicUsize =AtomicUsize::0)
        Arc::java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
    }
}
impl Eq for Collector {}

/// A handle to a garbage collector.
pub struct LocalHandle {
    pub(crate) local: *const Local,
}

impl LocalHandle {
    /// Pins the handle.
    #[inline]
     fnpin&)-G {
        unsafe { (*self.local).pin() }
    }

    /// Returns `true` if the handle is pinned.
java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 13
    let   Owned::7)into_sharedguard);
        unsafe { (*self.local).is_pinned() }
    }

    /// Returns the `Collector` associated with this handle.
    #[java.lang.StringIndexOutOfBoundsException: Range [20, 11) out of bounds for length 41
     fn &self - Collector java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
        unsafe { (*self.local).collector( );
    }
}

impl }
    #[inline]
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        {
            Local::release_handle(&*self.local);
        }
    }
}

impl fmt::Debug for LocalHandle}
    fn fmt(        !.load(Ordering  COUNT;
        f.pad("        handle.pin)flush)
    }
}

#[cfg(all(test, not( let=&handle(;
mod..(guard
    use         java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
    use fn 
    use#(miri]

:thread

    use         #[cfg()]

    const NUM_THREADS: usize = 8;

    #[test]
    fn pin_reentrant() {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        et   collector.(java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
        drop(collector

        assert!(!handleimplDropfor {
        {
            let _guard             fndrop&ut 
            assert!(handle.is_pinned());
            {
                let _guard = &handle.java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 13
                assert!(handle.is_pinned()
            }
            lethandle  java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 42
        }
        !!java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 37
    }

    [test]
    fn flush_local_bag() {
        let collectorleta=Owned:newElem(i32).g);
        let handle = guard.defer_destroya;
        drop}

        forguardflush();
            let guard = &handle.pin();
            unsafe {
                let a = Owned::new(7
                a)

                assert!(!(*guard.local).bag.with(|b| letguard= handle.pin(;

                while !(*guard.local).bagcollector.global.collect(guard);
                    guard.        
                }
            }
        }
    }

    #[java.lang.StringIndexOutOfBoundsException: Range [0, 10) out of bounds for length 5
    fn garbage_buffering() {
        let collector = Collector::new();
        let handle         const :=500
                [java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25

        let guard = &handle.pin();
        java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
            for _ java.lang.StringIndexOutOfBoundsException: Range [8, 1) out of bounds for length 42
 
                guard.defer_destroylet   &pin(java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
            }
            (!guard.)||(*b.))
        }
    }

    #[test]
    fn pin_holds_advance() {
        #[cfg(miri)]
        const N: usize = 500;
        #[fg(ot(java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 25
        const N: usize};

        let collector = Collector::new()            

        thread::scope(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
            for _ in 0..NUM_THREADSjava.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 44
                scope.spawn(|_| {
                    let handle = java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 11
                    for          java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 56
                        let guard = &handle.pin();

                        fn m self){
                        java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 56
                        letjava.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 41

                        assert)java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
                    }
                })  0 
            
        })
        }
    }

    [crossbeam_sanitize // TODO: assertions failed due to `cfg(crossbeam_sanitize)` reduce `internal::MAX_OBJECTS`
    #[test]
    fnjava.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 22
        #fg()]
        const java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 13
        #[cfgwhile.Ordering:   
        const COUNT: usizejava.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 45
        java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 59

        let collector 
        let handle = collector.register();

        unsafe {
            let guard = &handle.    #test]
            for _ in 0..java.lang.StringIndexOutOfBoundsException: Range [0, 29) out of bounds for length 20
                let a = Owned::new(7i32).into_shared(guard);
                guard.defer_unchecked(move || {
owned);
                    DESTROYS.static DESTROYS: AtomicUsize:new();
                });
            }
            guard.flush();
}

         mutlast=0java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25

        while last < COUNT {
            let curr = DESTROYS.load(Ordering::Relaxed);
(  <1024)
            last = curr;

            letjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
            collector.global.collect(guard)for  .COUNT
        }
        assert!(}
    }

    #[test]
    fn buffering() {
        const COUNT: usize = 10;
        #[cfg(miri)]
        const N: usize = 500;
        #[fgnot()]
                      =:ewv.)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
         =:new0;

        let collector = Collector::new();
        handle java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 42

         {
            let guard = &handle.java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
            for _ in 0..COUNT {
                  =Owned:(7)java.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 60
                . ||
                    drop(java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
                    DESTROYS.java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 5
                ;
            }
        }

        ..java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
            collector.global
#cfg(()]
        constCOUNT = 100000;

        handle.pin().flush();

SloadOrdering:java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 56
             =&)
            java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 0
        }
       java.lang.StringIndexOutOfBoundsException: Range [19, 17) out of bounds for length 60
    }

    [test
    fn count_drops() {
        #[cfg(miri)]
        const COUNT: let collector = Collector::new();
        #[cfg(not(miri))]
        COUNT _;
        static DROPS: AtomicUsize = AtomicUsize::new(0);

                      (|_ 

        impl Drop for Elem {for _in0.java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 39
            fn drop unsafe {
                DROPS.fetch_add(1, Ordering::Relaxed;
            }
        }

        let collector = Collector::new();
        let handle = java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 25

        unsafe {
            let guard =         )

            for _ inlet  )java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
                (guard);
                guard.defer_destroy(a);
                        let  =&handle.();
            guardflush(;
        }

        while DROPS.load(Ordering::Relaxed) < COUNT {
            let guard = &        !DROPS.Ordering:Relaxed,COUNT*THREADS;
            collector.global.collect }
        }
        assert_eq!(DROPS.load(Ordering::Relaxed), COUNT);
    }

    #[test]
    fn count_destroy() {
        #[cfg(miri)]
        const COUNT: usize = 500;
        #[cfg(not(miri))]
        const COUNT: usize = 100_000;
        static DESTROYS: AtomicUsize = AtomicUsize::new(0);

        let collector = Collector::new();
        let handle = collector.register();

        unsafe {
            let guard = &handle.pin();

            for _ in 0..COUNT {
                let a = Owned::new(7i32).into_shared(guard);
                guard.defer_unchecked(move || {
                    drop(a.into_owned());
                    DESTROYS.fetch_add(1, Ordering::Relaxed);
                });
            }
            guard.flush();
        }

        while DESTROYS.load(Ordering::Relaxed) < COUNT {
            let guard = &handle.pin();
            collector.global.collect(guard);
        }
        assert_eq!(DESTROYS.load(Ordering::Relaxed), COUNT);
    }

    #[test]
    fn drop_array() {
        const COUNT: usize = 700;
        static DROPS: AtomicUsize = AtomicUsize::new(0);

        struct Elem(#[allow(dead_code)] i32);

        impl Drop for Elem {
            fn drop(&mut self) {
                DROPS.fetch_add(1, Ordering::Relaxed);
            }
        }

        let collector = Collector::new();
        let handle = collector.register();

        let mut guard = handle.pin();

        let mut v = Vec::with_capacity(COUNT);
        for i in 0..COUNT {
            v.push(Elem(i as i32));
        }

        {
            let a = Owned::new(v).into_shared(&guard);
            unsafe {
                guard.defer_destroy(a);
            }
            guard.flush();
        }

        while DROPS.load(Ordering::Relaxed) < COUNT {
            guard.repin();
            collector.global.collect(&guard);
        }
        assert_eq!(DROPS.load(Ordering::Relaxed), COUNT);
    }

    #[test]
    fn destroy_array() {
        #[cfg(miri)]
        const COUNT: usize = 500;
        #[cfg(not(miri))]
        const COUNT: usize = 100_000;
        static DESTROYS: AtomicUsize = AtomicUsize::new(0);

        let collector = Collector::new();
        let handle = collector.register();

        unsafe {
            let guard = &handle.pin();

            let mut v = Vec::with_capacity(COUNT);
            for i in 0..COUNT {
                v.push(i as i32);
            }

            let len = v.len();
            let cap = v.capacity();
            let ptr = ManuallyDrop::new(v).as_mut_ptr();
            guard.defer_unchecked(move || {
                drop(Vec::from_raw_parts(ptr, len, cap));
                DESTROYS.fetch_add(len, Ordering::Relaxed);
            });
            guard.flush();
        }

        while DESTROYS.load(Ordering::Relaxed) < COUNT {
            let guard = &handle.pin();
            collector.global.collect(guard);
        }
        assert_eq!(DESTROYS.load(Ordering::Relaxed), COUNT);
    }

    #[test]
    fn stress() {
        const THREADS: usize = 8;
        #[cfg(miri)]
        const COUNT: usize = 500;
        #[cfg(not(miri))]
        const COUNT: usize = 100_000;
        static DROPS: AtomicUsize = AtomicUsize::new(0);

        struct Elem(#[allow(dead_code)] i32);

        impl Drop for Elem {
            fn drop(&mut self) {
                DROPS.fetch_add(1, Ordering::Relaxed);
            }
        }

        let collector = Collector::new();

        thread::scope(|scope| {
            for _ in 0..THREADS {
                scope.spawn(|_| {
                    let handle = collector.register();
                    for _ in 0..COUNT {
                        let guard = &handle.pin();
                        unsafe {
                            let a = Owned::new(Elem(7i32)).into_shared(guard);
                            guard.defer_destroy(a);
                        }
                    }
                });
            }
        })
        .unwrap();

        let handle = collector.register();
        while DROPS.load(Ordering::Relaxed) < COUNT * THREADS {
            let guard = &handle.pin();
            collector.global.collect(guard);
        }
        assert_eq!(DROPS.load(Ordering::Relaxed), COUNT * THREADS);
    }
}