Struct std::sync::atomic::AtomicI64
[−]
[src]
pub struct AtomicI64 { // some fields omitted }
integer_atomics
#32976)An integer type which can be safely shared between threads.
Methods
impl AtomicI64
const fn new(v: i64) -> AtomicI64
integer_atomics
#32976)Creates a new atomic integer.
Examples
fn main() { use std::sync::atomic::AtomicIsize; let atomic_forty_two = AtomicIsize::new(42); }use std::sync::atomic::AtomicIsize; let atomic_forty_two = AtomicIsize::new(42);
fn load(&self, order: Ordering) -> i64
integer_atomics
#32976)Loads a value from the atomic integer.
load
takes an Ordering
argument which describes the memory ordering of this
operation.
Panics
Panics if order
is Release
or AcqRel
.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.load(Ordering::Relaxed), 5); }use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.load(Ordering::Relaxed), 5);
fn store(&self, val: i64, order: Ordering)
integer_atomics
#32976)Stores a value into the atomic integer.
store
takes an Ordering
argument which describes the memory ordering of this
operation.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); some_isize.store(10, Ordering::Relaxed); assert_eq!(some_isize.load(Ordering::Relaxed), 10); }use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); some_isize.store(10, Ordering::Relaxed); assert_eq!(some_isize.load(Ordering::Relaxed), 10);
Panics
Panics if order
is Acquire
or AcqRel
.
fn swap(&self, val: i64, order: Ordering) -> i64
integer_atomics
#32976)Stores a value into the atomic integer, returning the old value.
swap
takes an Ordering
argument which describes the memory ordering of this
operation.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.swap(10, Ordering::Relaxed), 5); }use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.swap(10, Ordering::Relaxed), 5);
fn compare_and_swap(&self, current: i64, new: i64, order: Ordering) -> i64
integer_atomics
#32976)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.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.compare_and_swap(5, 10, Ordering::Relaxed), 5); assert_eq!(some_isize.load(Ordering::Relaxed), 10); assert_eq!(some_isize.compare_and_swap(6, 12, Ordering::Relaxed), 10); assert_eq!(some_isize.load(Ordering::Relaxed), 10); }use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.compare_and_swap(5, 10, Ordering::Relaxed), 5); assert_eq!(some_isize.load(Ordering::Relaxed), 10); assert_eq!(some_isize.compare_and_swap(6, 12, Ordering::Relaxed), 10); assert_eq!(some_isize.load(Ordering::Relaxed), 10);
fn compare_exchange(&self, current: i64, new: i64, success: Ordering, failure: Ordering) -> Result<i64, i64>
integer_atomics
#32976)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
new
.
compare_exchange
takes two Ordering
arguments to describe the memory ordering of
this operation. The first describes the required ordering if the operation succeeds
while the second describes the required ordering when the operation fails. The
failure ordering can't be Release
or AcqRel
and must be equivalent or weaker
than the success ordering.
Examples
#![feature(extended_compare_and_swap)] fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.compare_exchange(5, 10, Ordering::Acquire, Ordering::Relaxed), Ok(5)); assert_eq!(some_isize.load(Ordering::Relaxed), 10); assert_eq!(some_isize.compare_exchange(6, 12, Ordering::SeqCst, Ordering::Acquire), Err(10)); assert_eq!(some_isize.load(Ordering::Relaxed), 10); }use std::sync::atomic::{AtomicIsize, Ordering}; let some_isize = AtomicIsize::new(5); assert_eq!(some_isize.compare_exchange(5, 10, Ordering::Acquire, Ordering::Relaxed), Ok(5)); assert_eq!(some_isize.load(Ordering::Relaxed), 10); assert_eq!(some_isize.compare_exchange(6, 12, Ordering::SeqCst, Ordering::Acquire), Err(10)); assert_eq!(some_isize.load(Ordering::Relaxed), 10);
fn compare_exchange_weak(&self, current: i64, new: i64, success: Ordering, failure: Ordering) -> Result<i64, i64>
integer_atomics
#32976)Stores a value into the atomic integer if the current value is the same as the
current
value.
Unlike 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. The first describes the required ordering if the
operation succeeds while the second describes the required ordering when the
operation fails. The failure ordering can't be Release
or AcqRel
and must be
equivalent or weaker than the success ordering.
Examples
#![feature(extended_compare_and_swap)] fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let val = AtomicIsize::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, } } }use std::sync::atomic::{AtomicIsize, Ordering}; let val = AtomicIsize::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, } }
fn fetch_add(&self, val: i64, order: Ordering) -> i64
integer_atomics
#32976)Add to the current value, returning the previous value.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0); assert_eq!(foo.fetch_add(10, Ordering::SeqCst), 0); assert_eq!(foo.load(Ordering::SeqCst), 10); }use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0); assert_eq!(foo.fetch_add(10, Ordering::SeqCst), 0); assert_eq!(foo.load(Ordering::SeqCst), 10);
fn fetch_sub(&self, val: i64, order: Ordering) -> i64
integer_atomics
#32976)Subtract from the current value, returning the previous value.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0); assert_eq!(foo.fetch_sub(10, Ordering::SeqCst), 0); assert_eq!(foo.load(Ordering::SeqCst), -10); }use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0); assert_eq!(foo.fetch_sub(10, Ordering::SeqCst), 0); assert_eq!(foo.load(Ordering::SeqCst), -10);
fn fetch_and(&self, val: i64, order: Ordering) -> i64
integer_atomics
#32976)Bitwise and with the current value, returning the previous value.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0b101101); assert_eq!(foo.fetch_and(0b110011, Ordering::SeqCst), 0b101101); assert_eq!(foo.load(Ordering::SeqCst), 0b100001); }use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0b101101); assert_eq!(foo.fetch_and(0b110011, Ordering::SeqCst), 0b101101); assert_eq!(foo.load(Ordering::SeqCst), 0b100001);
fn fetch_or(&self, val: i64, order: Ordering) -> i64
integer_atomics
#32976)Bitwise or with the current value, returning the previous value.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0b101101); assert_eq!(foo.fetch_or(0b110011, Ordering::SeqCst), 0b101101); assert_eq!(foo.load(Ordering::SeqCst), 0b111111); }use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0b101101); assert_eq!(foo.fetch_or(0b110011, Ordering::SeqCst), 0b101101); assert_eq!(foo.load(Ordering::SeqCst), 0b111111);
fn fetch_xor(&self, val: i64, order: Ordering) -> i64
integer_atomics
#32976)Bitwise xor with the current value, returning the previous value.
Examples
fn main() { use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0b101101); assert_eq!(foo.fetch_xor(0b110011, Ordering::SeqCst), 0b101101); assert_eq!(foo.load(Ordering::SeqCst), 0b011110); }use std::sync::atomic::{AtomicIsize, Ordering}; let foo = AtomicIsize::new(0b101101); assert_eq!(foo.fetch_xor(0b110011, Ordering::SeqCst), 0b101101); assert_eq!(foo.load(Ordering::SeqCst), 0b011110);