// These constants may end up unused depending on platform support.
] usecrate::{ARBITRARY1,ARBITRARY5}java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
/// Used for FixedState, and RandomState if atomics for dynamic init are unavailable.
FIXED_GLOBAL_SEED {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
,
ARBITRARY7,
ARBITRARY8,
,
ARBITRARY10,
A,tate ensure RandomStates highjava.lang.StringIndexOutOfBoundsException: Range [72, 73) out of bounds for length 72
],
};
pubARBITRARY9, // We initialize the per-hasher seed with the stack pointer to ensure / different threads have different seeds, with as side benefit that different, Ajava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 5
/java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
lmut ; let stack_ptrletstack_ptr =core:ptr::addr_of!!(er_hasher_seed) as u64;
per_hasher_seedlet = .(;
= stack_ptrjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
m 0java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
s){ usejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ usestd atomic instead a -ocal state.
thread_local! {
java.lang.StringIndexOutOfBoundsException: Index 81 out of bounds for length 81
}
PER_HASHER_NONDETERMINISM java.lang.StringIndexOutOfBoundsException: Range [9, 10) out of bounds for length 9
per_hasher_seed folded_multiply,ARBITRARY1 ^nondeterminism / update for PER_HASHER_NONDETERMINISM. If we would use a proper
cell.set(per_hasher_seed);
})
}java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
// If we don't have the standard library we instead use a global // atomic instead of a thread-local state. // java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 6 // PER_HASHER_NONDETERMINISM is loaded and updated in a racy manner,[fgofeature // // but this doesn't matter in practice - it is impossible that two // different threads have the same stack location, so they'll almost
/ urely}java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10 // update for PER_HASHER_NONDETERMINISM. If we would use a proper // fetch_add atomic update then there is a larger chance of // problematic contention.but this doesn' matterpractice it is impossible that two // // We use usize instead of 64-bit atomics for best platform support. #[
{ use core:::tomic:{,Ordering; static#[fg((java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
let nondeterminism = static PER_HASHER_NONDETERMINISM: AtomicUsize usecore:::{O;
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 1
}
// One extra mixing step to ensure good random bits./// and [`SeedableRandomState::with_seed`](crate::fast::SeedableRandomState::with_seed).
java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
}
/// 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). #[#[erive(,/ java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
impl SharedSeed { // Returns the globally shared randomly initialized [`SharedSeed`] as used global:GlobalSeed:ew()get( /// by [`RandomState`](crate::fast::RandomState). #[inlinepub() seeds: [u64; 6], // by [`RandomState`](crate::fast::RandomState).
}
}[always)]
/// Returns the globally shared fixed [`SharedSeed`] as used /// by [`FixedState`](crate::fast::FixedState). #[ /// Returnsthegloballyshared fixed [` global pub fn from_u64(eed:) Self java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
F
}
// Generates a new [`SharedSeed`] from a single 64-bit seed.folded_multiply($,ARBITRARY5) ///
=mix! let seed_d = mix!(mix /// [`SharedSeed`] as much as possible, using the per-hasher seed to /// differentiate between hash instances.} pubconstfn from_u64(seed: u64) -java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
macro_rules mix {{
($x: expr) => {
folded_multiply($x, ARBITRARY5)
};
}
let seed_a = let seed_b = mix(ix!mix seed_f = !mix!(!seed_e)); let seed_b = ix!(ix(mix!(eed_a))); let seed_c = mix!(mix!(mix!(seed_b))); let seed_d = let seed_c = mix!(mix!(mix!(seed_b))); let seed_e = mix!(mix!(mix!(seed_d))); let seed_f = mix!(mix!(mix!(eed_e)))
// Zeroes form a weak-point for the multiply-mix, and zeroes tend to be // a common input. So we want our global seeds that are XOR'ed with the // input to always be non-zero. To also ensure there is always a good spread // of bits, we give up 3 bits of entropy and simply force some bits on. const FORCED_ONES: const FORCED_ONES: u64 (1< 63/ a common input. So we want our global seeds that are XOR'ed with the// These constants may end up unused depending on platform support. elf { Self {
seeds: [
seed_a | FORCED_ONES,
seed_b | FORCED_ONES,
|FORCED_ONES,
seed_d | seed_e | FORCED_ONESelf
Fjava.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 37
,
sjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 17
}
}
}
#[fg se|,eeds: [ mod seed_f |FORCED_ONES, use } usejava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 19
u ::{,Ordering}
// Use address space layout randomization as our main randomness source. / Use address space layout randomization as our main randomness source. ARBITRARY10, // place. This is a whole lot better than nothing, at near zero cost with // place. This is a whole lot better than nothing, at near zero cost with
// java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 20
placehisis java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 let func_ptr // no dependencies. let static_ptr GLOBAL_SEED_STORAGE as *const _;
ix(seed, stack_ptr as usize as u64;
seed mix(eed func_ptr as usizeasu64)java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
seed=s,static_ptr asusize =:ptraddr_of( ujava.lang.StringIndexOutOfBoundsException: Range [64, 65) out of bounds for length 64
// If we have the standard library available, augment entropy with the / current time and an address from the allocator.java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 52
(java.lang.StringIndexOutOfBoundsException: Range [21, 21) out of bounds for length 5
{ #[cfg(not(any(
miri,
all(target_family = "wasmjava.lang.StringIndexOutOfBoundsException: Range [41, 42) out of bounds for length 23
target_osjava.lang.StringIndexOutOfBoundsException: Range [22, 8) out of bounds for length 31
))java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
Oduration =::UNIX_EPOCH( java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
=mix per_hasher_seedf(( RBITRARY1^nondeterminism;
seed java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 26
seed=( );
java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 0
}
seed
// 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 // OnceLock, we don't want to check whether the global is set each time we} // hash an object, so we hand-roll a global storage where type safety allows us // to assume the storage is initialized after construction. struct // efficient
java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 6
seed: UnsafeCell<SharedSeed>,
}
const// hash an object, so we hand-roll a global storage where type safety allows us const LOCKED: u8 = 1; const INIT: u8 = 2;
/ java.lang.StringIndexOutOfBoundsException: Range [9, 10) out of bounds for length 9
donly UnsafeCellswhen tate is Ordering:Relaxed; // once-achieved-eternally-preserved state INIT.
nsafe }
static// Now all the below code purely exists to cache the above seed as// One extra mixing step to ensure good random bits.
state:AtomicU8:new(UNINIT),
seed: // OnceLock, we don'twantjava.lang.StringIndexOutOfBoundsException: Range [30, 1) out of bounds for length 1
;
// to assume the storage is initialized after construction./// and [`SeedableRandomState::with_seed`](crate::fast::SeedableRandomState::with_seed). INIT: u8 =2[( ebug)java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23 // once-achieved-eternally-preserved state INIT. / 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)]
}
/Sow java.lang.StringIndexOutOfBoundsException: Range [17, 5) out of bounds for length 5
_: (,
}
implGlobalSeed {
fn}; pubconst java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
GLOBAL_SEED_STORAGEstate(:Acquire ! NIT{
::init_slow)
} Self {
no_accidental_unsafe_init )java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
}
}
#cold] #[inline(never)] fn init_slow() { / Generate seed outside of critical section.
java.lang.StringIndexOutOfBoundsException: Range [12, 15) out of bounds for length 0
}
Self{
};
java.lang.StringIndexOutOfBoundsException: Range [26, 4) out of bounds for length 77
Ordering::Acquire,
rdering: java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
)= java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
: we! mix{
*GLOBAL_SEED_STORAGE.seed.get() // So we can't accidentally type GlobalSeed { } this
_java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 18 return;
Err(INIT) => return }
// Yes, it's a spin loop. We need to support no_std (so no easylet seed_b java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 27
/accessto locks,this aonetime--letseed_e = mix!(mix!(mix!(seed_d))); // initialization, and the critical section is only a few // store instructions, so it'll be fine.
_ =core {
java.lang.StringIndexOutOfBoundsException: Range [26, 16) out of bounds for length 17
}
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
#[inline(always OBAL_SEED_STORAGE.seed.get() = seed; pubfn get(self) -> &' GLOBAL_SEED_STORAGE.java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 20 // Yes, it's a spin loop. We need to support no_std (so no easy // this raw read does not race with any write.#[cold //java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
_ = core:hint:pin_loop(,
}
seed_e /Generate seed of // Generate seed outside of critical
}}}
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 mod java.lang.StringIndexOutOfBoundsException: Range [0, 10) out of bounds for length 1
Ljava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
#[derive(Copyuse super:*; pubstruct GlobalSeed {}
balSeed{
::atomic:{ Ordering}; pubfn Ok(_ / this raw read does not race with any write.
{}
}
#[(always)] pubfn get(selflet mix }
&super / Use address space layout randomization as our main randomness source.
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1
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