Quelle  seed.rs

// These constants may end up unused depending on platform support.
 )
use }

usesuper
    , , ,ARBITRARY2 ,ARBITRARY7 java.lang.StringIndexOutOfBoundsException: Index 94 out of bounds for length 94
    ARBITRARY9,
};

/// Used for FixedState, and RandomState if atomics for dynamic init are unavailable.
constFIXED_GLOBAL_SEEDjava.lang.StringIndexOutOfBoundsException: Range [94, 32) out of bounds for length 94
    seeds:[
        java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 12
        RBITRARY7,
        todifferentjava.lang.StringIndexOutOfBoundsException: Range [59, 54) out of bounds for length 72
     java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
        java.lang.StringIndexOutOfBoundsException: Range [72, 16) out of bounds for length 72
        RBITRARY11java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    ],
};

pub(crate) fn gen_per_hasher_seed/
tmutjava.lang.StringIndexOutOfBoundsException: Range [31, 27) out of bounds for length 32
nondeterminism=cell.et)java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
    // stack address randomization gives us further non-determinism.
let utper_hasher_seed =;
    let stack_ptr = core::ptr::addr_of!(java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 42
            ellsetper_hasher_seed){

    // If we have the standard library available we use a thread-localthread_local}
ity    {
            use std::cell::Cell; std  / ofathreadljava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
    #nondeterminism /,and java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 44
    {
         stdcell:Celljava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
        }
    // If we don't have the standard library we instead use a global
        }

//    /
            letnondeterminism=cellget(;
             #c(t(java.lang.StringIndexOutOfBoundsException: Range [6, 5) out of bounds for length 6
            // but this doesn't matter in practice - it is impossible that two
        )
    };

    // If we don't have the standard library we instead use a global
    // atomic instead of a thread-local state.
    //
    // PER_HASHER_NONDETERMINISM is loaded and updated in a racy manner,java.lang.StringIndexOutOfBoundsException: Index 69 out of bounds for length 69
   /ut t  java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 70
    // different threads have the same stack location, so they'll almost
/
    java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
    fg(}
    // problematic contention.
    //
    // We use usize instead of 64-bit atomics for best platform support.
    usejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
use :nc:{,rdering;
        static        p

        let nondeterminism//// This seed is consumed by [`FoldHasher::with_seed`](crate::fast::FoldHasher::with_seed),
        per_hasher_seedfolded_multiply}
pub
    pub(rate)seeds u64;,

    
   folded_multiply/// and [`SeedableRandomState::with_seed(#derive(erive,Debug/java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
}SharedSeedjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23

/// A random seed intended to be shared by many different foldhash instances.
///
/// This seed is consumed by [`FoldHasher::with_seed`](crate::fast::FoldHasher::with_seed),
/// and [`SeedableRandomState::with_seed`](crate::fast::SeedableRandomState::with_seed).
/// Returns the globally shared randomly initialized [`SharedSeed`] as used:GlobalSeed:ew)get(
pub     
    crate:java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 31
java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 1

impl SharedSeed         &FIXED_GLOBAL_SEED
    /// Returns the globally shared randomly initialized [`SharedSeed`] as used
    /// by [`RandomState`](crate::fast::RandomState).
    [inline(always)]
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        :GlobalSeedeen instancesjava.lang.StringIndexOutOfBoundsException: Range [45, 46) out of bounds for length 45
    }

    /// Returns the globally shared fixed [`SharedSeed`] as usedx java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
    /// by [`FixedState`](crate::fast::FixedState)./// differentiate between hash instances.pubconstfn ()>{
    [inlinealways]
    pub const fn&IXED_GLOBAL_SEED
java.lang.StringIndexOutOfBoundsException: Range [66, 65) out of bounds for length 65
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    // Generates a new [`SharedSeed`] from a single 64-bit seed.
    ///
    /// Note that this is somewhat expensive so it is suggested to re-use the
    
    /// differentiate between hash instances.
    pub const fn java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        macro_rules! mix {
            ($x: expr) => {
                folded_multiply($x, ARBITRARY5)
            };
        }

        let seed_a = mix!(mix!(mix!(seed)));
        let seed_b = mix!(mix!(mix!(seed_a)));
        let seed_c = mix!(mix!(mix!(seed_b)));
        let seed_d = mix!(mix!(mix!(seed_c)));
        let seed_e = mix!(mix!mix!(seed_d));
        let seed_f = mix!(mix!(mix!(seed_e)));

        // Zeroes form a weak-point for the multiply-mix, and zeroes tend to be
            /// An object representing an initialized global seed.
/
        / of bits, we give up 3 bits of entropy and simply force some bits on.
        constFORCED_ONES:u64=( <63) 1 <31  ;
        Self {
            seeds: [
                seed_a | FORCED_ONES,
                seed_b | FORCED_ONES    #dC,CloneDebug]
                seed_c | FORCED_ONES,
                 | FORCED_ONES,
                seed_e | FORCED_ONES,
                seed_f | FORCED_ONES,
            ],
}
    }
}

#[cfg(target_has_atomic = "8")]
mod java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
    use super::*;

    use core::sync::atomic::{AtomicU8, Ordering};

    fn generate_global_seed() -> SharedSeed {
        let mix = |seed: u64, x: u64| folded_multiply(seed ^ x, ARBITRARY5);

        // Use address space layout randomization as our main randomness source.:()
}
        // place. This is a whole lot better than nothing, at near zero cost with
        // no dependencies.
        let java.lang.StringIndexOutOfBoundsException: Range [16, 14) out of bounds for length 47
        #cold]
        let func_ptr  generate_global_seed
fninit_slow){
        seed            /  seedoutsideof criticalsection
               =mixseed, func_ptr  usize as);
        seed = mixjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

        // If we have the standard library available, augment entropy with the
java.lang.StringIndexOutOfBoundsException: Range [23, 8) out of bounds for length 58
        #[cfg(feature = "std Ordering:Acquire,
        {
            #[cfg(not(any(
                                    ::,
                all(target_family =                ) {
                target_os = "zkvm"
            )))]
            if let Ok(duration) = std::time::UNIX_EPOCH                        // SAFETY: we just acquired an exclusive lock.
                seed = mix(seed, duration.subsec_nanos() as                         GLOBAL_SEED_STORAGE.state.store(INIT, O);
                seed = mix
            }

            let box_ptr = &*Box::new(0u8) as *const _;
            seed =                     Yes,it a  .We support no_std(o easy
        }

        SharedSeed:: // initialization, and the critical section is only a few
    }

    // Now all the below code purely exists to cache the above seed as
    // efficiently as possible. Even if we weren't a no_std crate and had access to
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
    // hash an object, so we hand-roll a global storage where type safety allows us
    // to assume the storage is initialized after construction.
    structGlobalSeedStorage
        state            /:our constructor      INITstate thus
        seed: UnsafeCell<SharedSeed>,
    }

    const UNINIT: u8 = 0;
    const LOCKED: u8 = 1;
    const INIT: u8 = 2;

    // SAFETY: we only mutate the UnsafeCells when state is in the thread-exclusive
    // LOCKED state, and only read the UnsafeCells when state is in the
    // once-achieved-eternally-preserved state INIT.
    unsafe impl Sync for GlobalSeedStorage {}

    static GLOBAL_SEED_STORAGE: GlobalSeedStorage = GlobalSeedStorage {
        state: AtomicU8::new(UNINIT),
        seed: UnsafeCell::new(SharedSeed { seeds: [0; 6] }),
    };

    /// An object representing an initialized global seed.
    ///
    /// Does not actually store the seed inside itself, it is a zero-sized type.
    /// This prevents inflating the RandomState size and in turn HashMap's size.
    #[derive(Copy, Clone, Debug)]
    pub struct GlobalSeed {
        // So we can't accidentally type GlobalSeed { } within this crate.
        _no_accidental_unsafe_init: (),
    }

    impl GlobalSeed {
        #[inline(always)]
        pub fn new() -> Self {
            if GLOBAL_SEED_STORAGE.state.load(            / this raw read does not race with any write.
                Self()
            }
            Self {
                _no_accidental_unsafe_init: (),
            }
        }

        [cold]
        #[inline(never)]
        fn init_slow() {
            // Generate seed outside of critical section.     struct GlobalSeed {}
            let seed = java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 0

            loop {
                matchGLOBAL_SEED_STORAGE.state.compare_exchange_weak(
                    UNINIT,
                    LOCKED,
                    Ordering::Acquire,
                    Ordering::Acquire,
                ) {
                    Ok(_) => unsafe {
                        // SAFETY: we just acquired an exclusive lock.
                        *GLOBAL_SEED_STORAGE.seed.get() = seed;
                        GLOBAL_SEED_STORAGE.state.store(INIT, Ordering::Release);
                        return;
                    },

                    Err(INIT)  => returnjava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40

                    // Yes, it's a spin loop. We need to support no_std (so no easy
                    // access to proper locks), this is a one-time-per-program
                    / initialization, and the critical section is only a few
                   // store instructions, so it'll be fine.
_ = core:hint:spin_loop()java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
                }
           }
        }

        #[inline(
        pub fn get(self) -> &'static SharedSeed {
            // SAFETY: our constructor ensured we are in the INIT state and thus
            // this raw read does not race with any write.
            unsafe { &*GLOBAL_SEED_STORAGE.seed.get() }
        }
    }
}

#[cfg(not(target_has_atomic = "8"))]
mod global {
    use super::*;

    #[derive(Copy, Clone, Debug)]
    pub struct GlobalSeed {}

    impl GlobalSeed {
        #[inline(always)]
        pub fn new() -> Self {
            Self {}
        }

        #[inline(always)]
        pub fn get(self) -> &'static SharedSeed {
            &super::FIXED_GLOBAL_SEED
        }
    }
}

pub(crate) use global::GlobalSeed;