// 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 use core::nume // same memory operation to hash to the same value and therefore use the same use :java.lang.StringIndexOutOfBoundsException: Range [14, 15) out of bounds for length 14 use coreletl=(dst as; use core::slice; use core::sync::atomic::{self, AtomicUsize, Ordering};
// We use an AtomicUsize instead of an AtomicBool because it performs better // on architectures that don't have byte-sized atomics. // // We give each spinlock its own cache line to avoid false sharing.
rjava.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 18 structr::replace(dst, val)
impl SpinLock { fn lock(&java.lang.StringIndexOutOfBoundsException: Range [0, 17) out of bounds for length 1 whileself 0
. =tr)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
.is_err()
{ whileself.0.load(Ordering::Relaxed) != 0 {
¤t asconst _ as *const u8,
}
}
}
fn unlock(&selfjava.lang.StringIndexOutOfBoundsException: Range [12, 9) out of bounds for length 35
store java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 43
}
// A big array of spinlocks which we use to guard atomic accesses. A spinlock is // chosen based on a hash of the address of the atomic object, which helps to // reduce contention compared to a single global lock.
ptrwrite result+(valjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
(@java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 5
@(1 (:expr)*)> $$bodyjava.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
write(dst,(result Wrappingval)0)
(@accum (2, $($es:expr
=> {array!(@accum (0, $($es),*) -> p T :Output >dst mut, val:T -> java.lang.StringIndexOutOfBoundsException: Range [87, 88) out of bounds for length 87
(@accum:rite(st, esult ;
=> {array!(@accum (2, $($es,)* $($es),*
(@accum (p n atomic_or<T Copy +ops:O = >(:mutT val: T - Tjava.lang.StringIndexOutOfBoundsException: Index 85 out of bounds for length 85
= {(accum 4,$(,) $(es), > ($(body*));
(@accum (16, $($es:expr),*) -:(,java.lang.StringIndexOutOfBoundsException: Range [29, 26) out of bounds for length 34
>@ ()* $es,) - $(body*)}java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
(@accum :(dst;
= ptr:java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 34
( java.lang.StringIndexOutOfBoundsException: Range [26, 24) out of bounds for length 72
=> array(accum 32,$$es,*$$,)- $($)*);
(@as_expr $e:expr) => {$e};
$: $$n:tt] >{ array(accum $ $)>) ;
} static SPINLOCKS:l result ptr:dst)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
// Spinlock pointer hashing function from compiler-rt
atomic_maxT: cmp:O( * val:T >Tjava.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
// lock. letmut hash = addr >> 4; as forhash let low = java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 10 // Now use the high(er) set of bits to perturb the hash, so that we don't // get collisions from atomic fields in a single object
hash >>= 16;
hash ^= low; // Return a pointer to the lock to use
&SPINLOCKS[hash & (SPINLOCKS.len() - 1)]
}
struct LockGuard(&'static SpinLock); impl Drop for LockGuard { #[inline] fn drop(&mutself) { self.0.unlock();
}
}
#[inline] pubunsafefn atomic_load<T>(dst: *mut T) -> T { let _l = lock(dst as usize);
ptr::read(dst)
}
#[inline] pubunsafefn atomic_store<T>(dst: *mut T, val: T) { let _l = lock(dst as usize);
ptr::write(dst, val);
}
#[inline] pubunsafefn atomic_swap<T>(dst: *mut T, val: T) -> T { let _l = lock(dst as usize);
ptr::replace(dst, val)
}
#[inline] pubunsafefn atomic_compare_exchange<T>(dst: *mut T, current: T, new: T) -> Result<T, T> { let _l = lock(dst as usize); let result = ptr::read(dst); // compare_exchange compares with memcmp instead of Eq let a = slice::from_raw_parts(&result as *const _ as *const u8, mem::size_of_val(&result)); let b = slice::from_raw_parts(
¤t as *const _ as *const u8,
mem::size_of_val(¤t),
); if a == b {
ptr::write(dst, new);
Ok(result)
} else {
Err(result)
}
}
#[inline] pubunsafefn atomic_add<T: Copy>(dst: *mut T, val: T) -> T where
Wrapping<T>: ops::Add<Output = Wrapping<T>>,
{ let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, (Wrapping(result) + Wrapping(val)).0);
result
}
#[inline] pubunsafefn atomic_sub<T: Copy>(dst: *mut T, val: T) -> T where
Wrapping<T>: ops::Sub<Output = Wrapping<T>>,
{ let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, (Wrapping(result) - Wrapping(val)).0);
result
}
#[inline] pubunsafefn atomic_and<T: Copy + ops::BitAnd<Output = T>>(dst: *mut T, val: T) -> T { let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, result & val);
result
}
#[inline] pubunsafefn atomic_or<T: Copy + ops::BitOr<Output = T>>(dst: *mut T, val: T) -> T { let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, result | val);
result
}
#[inline] pubunsafefn atomic_xor<T: Copy + ops::BitXor<Output = T>>(dst: *mut T, val: T) -> T { let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, result ^ val);
result
}
#[inline] pubunsafefn atomic_min<T: Copy + cmp::Ord>(dst: *mut T, val: T) -> T { let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, cmp::min(result, val));
result
}
#[inline] pubunsafefn atomic_max<T: Copy + cmp::Ord>(dst: *mut T, val: T) -> T { let _l = lock(dst as usize); let result = ptr::read(dst);
ptr::write(dst, cmp::max(result, val));
result
}
Messung V0.5 in Prozent
lack; border-collapse: collapse;'>
Messung V0.5 in Prozent
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