penumbra_dex::component::metrics::atomics

Struct AtomicU64

1.34.0 · Source
#[repr(C, align(8))]
pub struct AtomicU64 { /* private fields */ }
Available on crate feature component only.
Expand description

An integer type which can be safely shared between threads.

This type has the same size and bit validity as the underlying integer type, u64. However, the alignment of this type is always equal to its size, even on targets where u64 has a lesser alignment.

For more about the differences between atomic types and non-atomic types as well as information about the portability of this type, please see the module-level documentation.

Note: This type is only available on platforms that support atomic loads and stores of u64.

Implementations§

Source§

impl AtomicU64

1.34.0 (const: 1.34.0) · Source

pub const fn new(v: u64) -> AtomicU64

Creates a new atomic integer.

§Examples
use std::sync::atomic::AtomicU64;

let atomic_forty_two = AtomicU64::new(42);
1.75.0 (const: 1.84.0) · Source

pub const unsafe fn from_ptr<'a>(ptr: *mut u64) -> &'a AtomicU64

Creates a new reference to an atomic integer from a pointer.

§Examples
use std::sync::atomic::{self, AtomicU64};

// Get a pointer to an allocated value
let ptr: *mut u64 = Box::into_raw(Box::new(0));

assert!(ptr.cast::<AtomicU64>().is_aligned());

{
    // Create an atomic view of the allocated value
    let atomic = unsafe {AtomicU64::from_ptr(ptr) };

    // Use `atomic` for atomic operations, possibly share it with other threads
    atomic.store(1, atomic::Ordering::Relaxed);
}

// It's ok to non-atomically access the value behind `ptr`,
// since the reference to the atomic ended its lifetime in the block above
assert_eq!(unsafe { *ptr }, 1);

// Deallocate the value
unsafe { drop(Box::from_raw(ptr)) }
§Safety
  • ptr must be aligned to align_of::<AtomicU64>() (note that on some platforms this can be bigger than align_of::<u64>()).
  • ptr must be valid for both reads and writes for the whole lifetime 'a.
  • You must adhere to the Memory model for atomic accesses. In particular, it is not allowed to mix atomic and non-atomic accesses, or atomic accesses of different sizes, without synchronization.
1.34.0 · Source

pub fn get_mut(&mut self) -> &mut u64

Returns a mutable reference to the underlying integer.

This is safe because the mutable reference guarantees that no other threads are concurrently accessing the atomic data.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let mut some_var = AtomicU64::new(10);
assert_eq!(*some_var.get_mut(), 10);
*some_var.get_mut() = 5;
assert_eq!(some_var.load(Ordering::SeqCst), 5);
Source

pub fn from_mut(v: &mut u64) -> &mut AtomicU64

🔬This is a nightly-only experimental API. (atomic_from_mut)
Available on target_has_atomic_equal_alignment="64" only.

Get atomic access to a &mut u64.

Note: This function is only available on targets where u64 has an alignment of 8 bytes.

§Examples
#![feature(atomic_from_mut)]
use std::sync::atomic::{AtomicU64, Ordering};

let mut some_int = 123;
let a = AtomicU64::from_mut(&mut some_int);
a.store(100, Ordering::Relaxed);
assert_eq!(some_int, 100);
Source

pub fn get_mut_slice(this: &mut [AtomicU64]) -> &mut [u64]

🔬This is a nightly-only experimental API. (atomic_from_mut)

Get non-atomic access to a &mut [AtomicU64] slice

This is safe because the mutable reference guarantees that no other threads are concurrently accessing the atomic data.

§Examples
#![feature(atomic_from_mut)]
use std::sync::atomic::{AtomicU64, Ordering};

let mut some_ints = [const { AtomicU64::new(0) }; 10];

let view: &mut [u64] = AtomicU64::get_mut_slice(&mut some_ints);
assert_eq!(view, [0; 10]);
view
    .iter_mut()
    .enumerate()
    .for_each(|(idx, int)| *int = idx as _);

std::thread::scope(|s| {
    some_ints
        .iter()
        .enumerate()
        .for_each(|(idx, int)| {
            s.spawn(move || assert_eq!(int.load(Ordering::Relaxed), idx as _));
        })
});
Source

pub fn from_mut_slice(v: &mut [u64]) -> &mut [AtomicU64]

🔬This is a nightly-only experimental API. (atomic_from_mut)
Available on target_has_atomic_equal_alignment="64" only.

Get atomic access to a &mut [u64] slice.

§Examples
#![feature(atomic_from_mut)]
use std::sync::atomic::{AtomicU64, Ordering};

let mut some_ints = [0; 10];
let a = &*AtomicU64::from_mut_slice(&mut some_ints);
std::thread::scope(|s| {
    for i in 0..a.len() {
        s.spawn(move || a[i].store(i as _, Ordering::Relaxed));
    }
});
for (i, n) in some_ints.into_iter().enumerate() {
    assert_eq!(i, n as usize);
}
1.34.0 (const: 1.79.0) · Source

pub const fn into_inner(self) -> u64

Consumes the atomic and returns the contained value.

This is safe because passing self by value guarantees that no other threads are concurrently accessing the atomic data.

§Examples
use std::sync::atomic::AtomicU64;

let some_var = AtomicU64::new(5);
assert_eq!(some_var.into_inner(), 5);
1.34.0 · Source

pub fn load(&self, order: Ordering) -> u64

Loads a value from the atomic integer.

load takes an Ordering argument which describes the memory ordering of this operation. Possible values are SeqCst, Acquire and Relaxed.

§Panics

Panics if order is Release or AcqRel.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let some_var = AtomicU64::new(5);

assert_eq!(some_var.load(Ordering::Relaxed), 5);
1.34.0 · Source

pub fn store(&self, val: u64, order: Ordering)

Stores a value into the atomic integer.

store takes an Ordering argument which describes the memory ordering of this operation. Possible values are SeqCst, Release and Relaxed.

§Panics

Panics if order is Acquire or AcqRel.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let some_var = AtomicU64::new(5);

some_var.store(10, Ordering::Relaxed);
assert_eq!(some_var.load(Ordering::Relaxed), 10);
1.34.0 · Source

pub fn swap(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Stores a value into the atomic integer, returning the previous value.

swap takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let some_var = AtomicU64::new(5);

assert_eq!(some_var.swap(10, Ordering::Relaxed), 5);
1.34.0 · Source

pub fn compare_and_swap(&self, current: u64, new: u64, order: Ordering) -> u64

👎Deprecated since 1.50.0: Use compare_exchange or compare_exchange_weak instead
Available on target_has_atomic="64" only.

Stores a value into the atomic integer if the current value is the same as the current value.

The return value is always the previous value. If it is equal to current, then the value was updated.

compare_and_swap also takes an Ordering argument which describes the memory ordering of this operation. Notice that even when using AcqRel, the operation might fail and hence just perform an Acquire load, but not have Release semantics. Using Acquire makes the store part of this operation Relaxed if it happens, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Migrating to compare_exchange and compare_exchange_weak

compare_and_swap is equivalent to compare_exchange with the following mapping for memory orderings:

OriginalSuccessFailure
RelaxedRelaxedRelaxed
AcquireAcquireAcquire
ReleaseReleaseRelaxed
AcqRelAcqRelAcquire
SeqCstSeqCstSeqCst

compare_exchange_weak is allowed to fail spuriously even when the comparison succeeds, which allows the compiler to generate better assembly code when the compare and swap is used in a loop.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let some_var = AtomicU64::new(5);

assert_eq!(some_var.compare_and_swap(5, 10, Ordering::Relaxed), 5);
assert_eq!(some_var.load(Ordering::Relaxed), 10);

assert_eq!(some_var.compare_and_swap(6, 12, Ordering::Relaxed), 10);
assert_eq!(some_var.load(Ordering::Relaxed), 10);
1.34.0 · Source

pub fn compare_exchange( &self, current: u64, new: u64, success: Ordering, failure: Ordering, ) -> Result<u64, u64>

Available on target_has_atomic="64" only.

Stores a value into the atomic integer if the current value is the same as the current value.

The return value is a result indicating whether the new value was written and containing the previous value. On success this value is guaranteed to be equal to current.

compare_exchange takes two Ordering arguments to describe the memory ordering of this operation. success describes the required ordering for the read-modify-write operation that takes place if the comparison with current succeeds. failure describes the required ordering for the load operation that takes place when the comparison fails. Using Acquire as success ordering makes the store part of this operation Relaxed, and using Release makes the successful load Relaxed. The failure ordering can only be SeqCst, Acquire or Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let some_var = AtomicU64::new(5);

assert_eq!(some_var.compare_exchange(5, 10,
                                     Ordering::Acquire,
                                     Ordering::Relaxed),
           Ok(5));
assert_eq!(some_var.load(Ordering::Relaxed), 10);

assert_eq!(some_var.compare_exchange(6, 12,
                                     Ordering::SeqCst,
                                     Ordering::Acquire),
           Err(10));
assert_eq!(some_var.load(Ordering::Relaxed), 10);
1.34.0 · Source

pub fn compare_exchange_weak( &self, current: u64, new: u64, success: Ordering, failure: Ordering, ) -> Result<u64, u64>

Available on target_has_atomic="64" only.

Stores a value into the atomic integer if the current value is the same as the current value.

Unlike AtomicU64::compare_exchange, this function is allowed to spuriously fail even when the comparison succeeds, which can result in more efficient code on some platforms. The return value is a result indicating whether the new value was written and containing the previous value.

compare_exchange_weak takes two Ordering arguments to describe the memory ordering of this operation. success describes the required ordering for the read-modify-write operation that takes place if the comparison with current succeeds. failure describes the required ordering for the load operation that takes place when the comparison fails. Using Acquire as success ordering makes the store part of this operation Relaxed, and using Release makes the successful load Relaxed. The failure ordering can only be SeqCst, Acquire or Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let val = AtomicU64::new(4);

let mut old = val.load(Ordering::Relaxed);
loop {
    let new = old * 2;
    match val.compare_exchange_weak(old, new, Ordering::SeqCst, Ordering::Relaxed) {
        Ok(_) => break,
        Err(x) => old = x,
    }
}
1.34.0 · Source

pub fn fetch_add(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Adds to the current value, returning the previous value.

This operation wraps around on overflow.

fetch_add takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(0);
assert_eq!(foo.fetch_add(10, Ordering::SeqCst), 0);
assert_eq!(foo.load(Ordering::SeqCst), 10);
1.34.0 · Source

pub fn fetch_sub(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Subtracts from the current value, returning the previous value.

This operation wraps around on overflow.

fetch_sub takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(20);
assert_eq!(foo.fetch_sub(10, Ordering::SeqCst), 20);
assert_eq!(foo.load(Ordering::SeqCst), 10);
1.34.0 · Source

pub fn fetch_and(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Bitwise “and” with the current value.

Performs a bitwise “and” operation on the current value and the argument val, and sets the new value to the result.

Returns the previous value.

fetch_and takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(0b101101);
assert_eq!(foo.fetch_and(0b110011, Ordering::SeqCst), 0b101101);
assert_eq!(foo.load(Ordering::SeqCst), 0b100001);
1.34.0 · Source

pub fn fetch_nand(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Bitwise “nand” with the current value.

Performs a bitwise “nand” operation on the current value and the argument val, and sets the new value to the result.

Returns the previous value.

fetch_nand takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(0x13);
assert_eq!(foo.fetch_nand(0x31, Ordering::SeqCst), 0x13);
assert_eq!(foo.load(Ordering::SeqCst), !(0x13 & 0x31));
1.34.0 · Source

pub fn fetch_or(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Bitwise “or” with the current value.

Performs a bitwise “or” operation on the current value and the argument val, and sets the new value to the result.

Returns the previous value.

fetch_or takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(0b101101);
assert_eq!(foo.fetch_or(0b110011, Ordering::SeqCst), 0b101101);
assert_eq!(foo.load(Ordering::SeqCst), 0b111111);
1.34.0 · Source

pub fn fetch_xor(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Bitwise “xor” with the current value.

Performs a bitwise “xor” operation on the current value and the argument val, and sets the new value to the result.

Returns the previous value.

fetch_xor takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(0b101101);
assert_eq!(foo.fetch_xor(0b110011, Ordering::SeqCst), 0b101101);
assert_eq!(foo.load(Ordering::SeqCst), 0b011110);
1.45.0 · Source

pub fn fetch_update<F>( &self, set_order: Ordering, fetch_order: Ordering, f: F, ) -> Result<u64, u64>
where F: FnMut(u64) -> Option<u64>,

Available on target_has_atomic="64" only.

Fetches the value, and applies a function to it that returns an optional new value. Returns a Result of Ok(previous_value) if the function returned Some(_), else Err(previous_value).

Note: This may call the function multiple times if the value has been changed from other threads in the meantime, as long as the function returns Some(_), but the function will have been applied only once to the stored value.

fetch_update takes two Ordering arguments to describe the memory ordering of this operation. The first describes the required ordering for when the operation finally succeeds while the second describes the required ordering for loads. These correspond to the success and failure orderings of AtomicU64::compare_exchange respectively.

Using Acquire as success ordering makes the store part of this operation Relaxed, and using Release makes the final successful load Relaxed. The (failed) load ordering can only be SeqCst, Acquire or Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Considerations

This method is not magic; it is not provided by the hardware. It is implemented in terms of AtomicU64::compare_exchange_weak, and suffers from the same drawbacks. In particular, this method will not circumvent the ABA Problem.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let x = AtomicU64::new(7);
assert_eq!(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |_| None), Err(7));
assert_eq!(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |x| Some(x + 1)), Ok(7));
assert_eq!(x.fetch_update(Ordering::SeqCst, Ordering::SeqCst, |x| Some(x + 1)), Ok(8));
assert_eq!(x.load(Ordering::SeqCst), 9);
1.45.0 · Source

pub fn fetch_max(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Maximum with the current value.

Finds the maximum of the current value and the argument val, and sets the new value to the result.

Returns the previous value.

fetch_max takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(23);
assert_eq!(foo.fetch_max(42, Ordering::SeqCst), 23);
assert_eq!(foo.load(Ordering::SeqCst), 42);

If you want to obtain the maximum value in one step, you can use the following:

use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(23);
let bar = 42;
let max_foo = foo.fetch_max(bar, Ordering::SeqCst).max(bar);
assert!(max_foo == 42);
1.45.0 · Source

pub fn fetch_min(&self, val: u64, order: Ordering) -> u64

Available on target_has_atomic="64" only.

Minimum with the current value.

Finds the minimum of the current value and the argument val, and sets the new value to the result.

Returns the previous value.

fetch_min takes an Ordering argument which describes the memory ordering of this operation. All ordering modes are possible. Note that using Acquire makes the store part of this operation Relaxed, and using Release makes the load part Relaxed.

Note: This method is only available on platforms that support atomic operations on u64.

§Examples
use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(23);
assert_eq!(foo.fetch_min(42, Ordering::Relaxed), 23);
assert_eq!(foo.load(Ordering::Relaxed), 23);
assert_eq!(foo.fetch_min(22, Ordering::Relaxed), 23);
assert_eq!(foo.load(Ordering::Relaxed), 22);

If you want to obtain the minimum value in one step, you can use the following:

use std::sync::atomic::{AtomicU64, Ordering};

let foo = AtomicU64::new(23);
let bar = 12;
let min_foo = foo.fetch_min(bar, Ordering::SeqCst).min(bar);
assert_eq!(min_foo, 12);
1.70.0 (const: 1.70.0) · Source

pub const fn as_ptr(&self) -> *mut u64

Returns a mutable pointer to the underlying integer.

Doing non-atomic reads and writes on the resulting integer can be a data race. This method is mostly useful for FFI, where the function signature may use *mut u64 instead of &AtomicU64.

Returning an *mut pointer from a shared reference to this atomic is safe because the atomic types work with interior mutability. All modifications of an atomic change the value through a shared reference, and can do so safely as long as they use atomic operations. Any use of the returned raw pointer requires an unsafe block and still has to uphold the same restriction: operations on it must be atomic.

§Examples
use std::sync::atomic::AtomicU64;

extern "C" {
    fn my_atomic_op(arg: *mut u64);
}

let atomic = AtomicU64::new(1);

// SAFETY: Safe as long as `my_atomic_op` is atomic.
unsafe {
    my_atomic_op(atomic.as_ptr());
}

Trait Implementations§

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impl AtomicConsume for AtomicU64

Available on non-crossbeam_no_atomic only.
§

type Val = u64

Type returned by load_consume.
§

fn load_consume(&self) -> <AtomicU64 as AtomicConsume>::Val

Loads a value from the atomic using a “consume” memory ordering. Read more
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impl BitStore for AtomicU64

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const ZERO: AtomicU64 = _

The zero constant.
§

const ALIGNED_TO_SIZE: [(); 1] = _

All implementors are required to have their alignment match their size. Read more
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const ALIAS_WIDTH: [(); 1] = _

All implementors are required to have Self and Self::Alias be equal in representation. This is true by fiat for all types except the unsigned integers. Read more
§

type Mem = u64

The element type used in the memory region underlying a BitSlice. It is always one of the unsigned integer fundamentals.
§

type Access = AtomicU64

A type that selects the appropriate load/store instructions when accessing the memory bus. It determines what instructions are used when moving a Self::Mem value between the processor and the memory system. Read more
§

type Alias = AtomicU64

A sibling BitStore implementor that is known to be alias-safe. It is used when a BitSlice introduces multiple handles that view the same memory location, and at least one of them has write capabilities to it. It must have the same underlying memory type, and can only change access patterns or public-facing usage.
§

type Unalias = AtomicU64

The inverse of ::Alias. It is used when a BitSlice removes the conditions that required a T -> T::Alias transition.
§

fn new(value: <AtomicU64 as BitStore>::Mem) -> AtomicU64

Wraps a raw memory value as a BitStore type.
§

fn load_value(&self) -> <AtomicU64 as BitStore>::Mem

Loads a value out of the memory system according to the ::Access rules. This may be called when the value is aliased by a write-capable reference.
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fn store_value(&mut self, value: <AtomicU64 as BitStore>::Mem)

Stores a value into the memory system. This is only called when there are no other handles to the value, and it may bypass ::Access constraints.
§

fn get_bit<O>(&self, index: BitIdx<Self::Mem>) -> bool
where O: BitOrder,

Reads a single bit out of the memory system according to the ::Access rules. This is lifted from BitAccess so that it can be used elsewhere without additional casts. Read more
§

impl CounterFn for AtomicU64

§

fn increment(&self, value: u64)

Increments the counter by the given amount.
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fn absolute(&self, value: u64)

Sets the counter to at least the given amount. Read more
1.34.0 · Source§

impl Debug for AtomicU64

Source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
1.34.0 · Source§

impl Default for AtomicU64

Source§

fn default() -> AtomicU64

Returns the “default value” for a type. Read more
Source§

impl<'de> Deserialize<'de> for AtomicU64

Available on no_target_has_atomic or target_has_atomic="64" only.
Source§

fn deserialize<D>( deserializer: D, ) -> Result<AtomicU64, <D as Deserializer<'de>>::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
1.34.0 · Source§

impl From<u64> for AtomicU64

Source§

fn from(v: u64) -> AtomicU64

Converts an u64 into an AtomicU64.

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impl GaugeFn for AtomicU64

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fn increment(&self, value: f64)

Increments the gauge by the given amount.
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fn decrement(&self, value: f64)

Decrements the gauge by the given amount.
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fn set(&self, value: f64)

Sets the gauge to the given amount.
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impl Radium for AtomicU64

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type Item = u64

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fn new(value: u64) -> AtomicU64

Creates a new value of this type.
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fn fence(order: Ordering)

If the underlying value is atomic, calls fence with the given Ordering. Otherwise, does nothing.
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fn get_mut(&mut self) -> &mut u64

Returns a mutable reference to the underlying value. Read more
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fn into_inner(self) -> u64

Consumes the wrapper and returns the contained value. Read more
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fn load(&self, order: Ordering) -> u64

Load a value from this object. Read more
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fn store(&self, value: u64, order: Ordering)

Store a value in this object. Read more
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fn swap(&self, value: u64, order: Ordering) -> u64

Swap with the value stored in this object. Read more
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fn compare_and_swap(&self, current: u64, new: u64, order: Ordering) -> u64

👎Deprecated: Use compare_exchange or compare_exchange_weak instead
Stores a value into this object if the currently-stored value is the same as the current value. Read more
§

fn compare_exchange( &self, current: u64, new: u64, success: Ordering, failure: Ordering, ) -> Result<u64, u64>

Stores a value into this object if the currently-stored value is the same as the current value. Read more
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fn compare_exchange_weak( &self, current: u64, new: u64, success: Ordering, failure: Ordering, ) -> Result<u64, u64>

Stores a value into this object if the currently-stored value is the same as the current value. Read more
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fn fetch_update<F>( &self, set_order: Ordering, fetch_order: Ordering, f: F, ) -> Result<u64, u64>
where F: FnMut(u64) -> Option<u64>,

Fetches the value, and applies a function to it that returns an optional new value. Read more
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fn fetch_and(&self, value: u64, order: Ordering) -> u64

Performs a bitwise “and” on the currently-stored value and the argument value, and stores the result in self. Read more
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fn fetch_nand(&self, value: u64, order: Ordering) -> u64

Performs a bitwise “nand” on the currently-stored value and the argument value, and stores the result in self. Read more
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fn fetch_or(&self, value: u64, order: Ordering) -> u64

Performs a bitwise “or” on the currently-stored value and the argument value, and stores the result in self. Read more
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fn fetch_xor(&self, value: u64, order: Ordering) -> u64

Performs a bitwise “xor” on the currently-stored value and the argument value, and stores the result in self. Read more
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fn fetch_add(&self, value: u64, order: Ordering) -> u64

Adds value to the currently-stored value, wrapping on overflow, and stores the result in self. Read more
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fn fetch_sub(&self, value: u64, order: Ordering) -> u64

Subtracts value from the currently-stored value, wrapping on underflow, and stores the result in self. Read more
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impl Serialize for AtomicU64

Available on no_target_has_atomic or target_has_atomic="64" only.
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fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where S: Serializer,

Serialize this value into the given Serde serializer. Read more
1.34.0 · Source§

impl RefUnwindSafe for AtomicU64

Available on target_has_atomic_load_store="64" only.
1.34.0 · Source§

impl Sync for AtomicU64

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<A> BitAccess for A
where A: Radium, <A as Radium>::Item: BitRegister,

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fn clear_bits(&self, mask: BitMask<Self::Item>) -> Self::Item

Clears bits within a memory element to 0. Read more
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fn set_bits(&self, mask: BitMask<Self::Item>) -> Self::Item

Sets bits within a memory element to 1. Read more
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fn invert_bits(&self, mask: BitMask<Self::Item>) -> Self::Item

Inverts bits within a memory element. Read more
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fn write_bit<O>(&self, index: BitIdx<Self::Item>, value: bool) -> bool
where O: BitOrder,

Writes a value to one bit in a memory element, returning the previous value. Read more
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fn get_writers( value: bool, ) -> for<'a> fn(_: &'a Self, _: BitMask<Self::Item>) -> Self::Item

Gets the function that will write value into all bits under a mask. Read more
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impl<T> BitView for T
where T: BitStore,

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type Store = T

The underlying element type.
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fn view_bits<O>(&self) -> &BitSlice<T, O>
where O: BitOrder,

Views a memory region as an immutable bit-slice.
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fn try_view_bits<O>(&self) -> Result<&BitSlice<T, O>, BitSpanError<T>>
where O: BitOrder,

Attempts to view a memory region as an immutable bit-slice. Read more
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fn view_bits_mut<O>(&mut self) -> &mut BitSlice<T, O>
where O: BitOrder,

Views a memory region as a mutable bit-slice.
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fn try_view_bits_mut<O>( &mut self, ) -> Result<&mut BitSlice<T, O>, BitSpanError<T>>
where O: BitOrder,

Attempts to view a memory region as a mutable bit-slice. Read more
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impl<T> BitViewSized for T
where T: BitStore,

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const ZERO: T = <T as BitStore>::ZERO

The zero constant.
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fn as_raw_slice(&self) -> &[<T as BitView>::Store]

Views the type as a slice of its elements.
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fn as_raw_mut_slice(&mut self) -> &mut [<T as BitView>::Store]

Views the type as a mutable slice of its elements.
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fn into_bitarray<O>(self) -> BitArray<Self, O>
where O: BitOrder,

Wraps self in a BitArray.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<T> Pipe for T
where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R, ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R, ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,