Struct core::sync::atomic::AtomicPtr
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pub struct AtomicPtr<T> {
p: UnsafeCell<*mut T>,
}A raw pointer type which can be safely shared between threads.
Fields
p |
Methods
impl<T> AtomicPtr<T>
const fn new(p: *mut T) -> AtomicPtr<T>
Creates a new AtomicPtr.
Examples
fn main() { use std::sync::atomic::AtomicPtr; let ptr = &mut 5; let atomic_ptr = AtomicPtr::new(ptr); }use std::sync::atomic::AtomicPtr; let ptr = &mut 5; let atomic_ptr = AtomicPtr::new(ptr);
fn load(&self, order: Ordering) -> *mut T
Loads a value from the pointer.
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::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let value = some_ptr.load(Ordering::Relaxed); }use std::sync::atomic::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let value = some_ptr.load(Ordering::Relaxed);
fn store(&self, ptr: *mut T, order: Ordering)
Stores a value into the pointer.
store takes an Ordering argument which describes the memory ordering of this operation.
Examples
fn main() { use std::sync::atomic::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let other_ptr = &mut 10; some_ptr.store(other_ptr, Ordering::Relaxed); }use std::sync::atomic::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let other_ptr = &mut 10; some_ptr.store(other_ptr, Ordering::Relaxed);
Panics
Panics if order is Acquire or AcqRel.
fn swap(&self, ptr: *mut T, order: Ordering) -> *mut T
Stores a value into the pointer, returning the old value.
swap takes an Ordering argument which describes the memory ordering of this operation.
Examples
fn main() { use std::sync::atomic::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let other_ptr = &mut 10; let value = some_ptr.swap(other_ptr, Ordering::Relaxed); }use std::sync::atomic::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let other_ptr = &mut 10; let value = some_ptr.swap(other_ptr, Ordering::Relaxed);
fn compare_and_swap(&self, current: *mut T, new: *mut T, order: Ordering) -> *mut T
Stores a value into the pointer 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::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let other_ptr = &mut 10; let another_ptr = &mut 10; let value = some_ptr.compare_and_swap(other_ptr, another_ptr, Ordering::Relaxed); }use std::sync::atomic::{AtomicPtr, Ordering}; let ptr = &mut 5; let some_ptr = AtomicPtr::new(ptr); let other_ptr = &mut 10; let another_ptr = &mut 10; let value = some_ptr.compare_and_swap(other_ptr, another_ptr, Ordering::Relaxed);