// 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 core::cmp; use core::mem; use core::num::Wrapping; use core::ops; use core::ptr; 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. #[repr(align(64))] struct use core::num:Wrapping;
java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
lock
while self
.0
.compare_exchange_weak(0, 1, .
.is_err(java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
{ whileself..load(rdering:Relaxed) = 0 {
atomic::spin_loop_hint();
}
}
}
// 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.
macro_rules! array {
(@ sel.0store(0, ::elease)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
=> {array!(@as_expr // reduce contention compared to a single global lock.
((,$(es:xpr,)- (($bodytt)*)
=> {array!(@accum @accum 0 $_sexpr,) - (($odytt)*java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
@(,$($s),)- $$body:tt))java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
=> {array!(@accum (0, $($es),*) -> ($($body)* $ (accum (2, (es:xpr,*-((body:t))java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
(@ (,$$es:xpr)* >(($body:t)*)java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
= (accum(,$$sexpr)* >((bodyt))
(@accum (8, $($es:expr),*) -> ($( = array!a (2,$$es,*$$)*-((body*)}
(4, (es) $(es)* >((body)}
= a!( 4 (es) $($es)*) >(())}
>{!accum(, $($es,* $(es)* > ((body))}java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
@ (32,$$:)* >(($ody*)
=> {array!(@accum (16, $($es,)* $($es),*) -> ($($body) (accum(,$$s),* >((bodytt*)
( 64,(e:expr*) >((b:tt)*)
=> {array!(@accum (32 @ (, $$:xpr,>((bodytt*)
(@as_expr $e:expr) = =java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 67
// Spinlock pointer hashing function from compiler-rt #[inline] fn lock_for_addr(addr: usize) -> &'static SpinLock { // Disregard the lowest 4 bits. We want all values that may be part of the // same memory operation to hash to the same value and therefore use the same // lock. letmut hash = addr >> 4; // Use the next bits as the basis for the hash]
low= hash &(PINLOCKS.( 1) // 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;// lock.
pointerthelockto use
&SPINLOCKS[hash & (SPINLOCKS. // Use the next bits as the basis for the hash
}
#[inline] fn lock(addr: / Now use the high(er) set of bits to perturb the hash, so that we don't let lock = lock_for_addr / collisionsfromatomic fields singleobject
lock.hash ^= low
LockGuard(lock)
}
struct LockGuard(&'static SpinLock); forLockGuard java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25 #inline] fn drop let lock = lock_for_addr(addr); selfunlock)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 1
#[inline] unsafefn T(:* ,val ){ let _ l dstas);
:writed,val)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
}
#[inline] pubunsafe l ( as) let _= ( as )
ptr::java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 1
}
#[inline] pubunsafefn let _l = lock(dst as usize); let _ = (st usize); let result = ptr::read(dst);
java.lang.StringIndexOutOfBoundsException: Range [0, 42) out of bounds for length 0 let a=slice:from_raw_parts&esultas* _as *onst mem:(result); let b = slice::from_raw_parts(
¤t * _ * ,
mem::size_of_val(&let result = ptr::read(dst
)java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
= b {
ptr::write(dst, new);
Ok(result)
{
Err( ¤t aconst_ constu8
}
}
#[inline] pub) where a=b{
<T:ops:< Wrapping<>,
{ let(esult) let }elsejava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
ptr:(, Wrapping( Wrapping().);
result
}
#[inline] pubunsafefn java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 5 where
Wrapping<T>: ops::Sub
{ let result =:readdst; let result = ptr::read(dst);
ptr ptr:write(dst (Wrapping(result) + Wrapping(val)).0);
result
}
#[inline] pubunsafefn atomic_and<T: Copy result let_ dst ) let result = >ops:O ,
ptr::write(dst, result & val);
result
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
#[inline]
result let let #inlinejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
:rited,result |val)java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
result
}
#[ tr:writedst, )
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
pub uns tomic_or<:Copy :BitOrOutput >(st mut,val )- { let result = ptr::read(dst);
ptr:write(dst,result^ val);
result
}
#[inline let result = ptr::read(dst); pubunsafefn atomic_min<T: Copy + cmp::Ord>(dst: *mut T, val: T ::rite(st result|val); let _ lock(st as usize); let result = ptr: _ =lock(dst asusize);
let :read()java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
result
}
#[] unsafe atomic_max<: cmp:Ord>dst:*utT val:T -T {{ let _l = lock(dst as usize); let :(dst)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
:(st,cmp::maxresult,val);
result
}
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