Struct token_cell::core::TokenCell

pub struct TokenCell<T: ?Sized, Token: TokenTrait> { /* private fields */ }

A Cell that shifts the management of access permissions to its inner value onto a Token.

Implementations

impl<T: ?Sized, Token: TokenTrait> TokenCell<T, Token>

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

impl<T: Sized, Token: TokenTrait> TokenCell<T, Token>

pub fn into_inner(self) -> T

Methods from Deref<Target = UnsafeCell<T>>

pub fn get(&self) -> *mut T

Gets a mutable pointer to the wrapped value.

This can be cast to a pointer of any kind. Ensure that the access is unique (no active references, mutable or not) when casting to &mut T, and ensure that there are no mutations or mutable aliases going on when casting to &T

Examples

use std::cell::UnsafeCell;

let uc = UnsafeCell::new(5);

let five = uc.get();

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

Returns a mutable reference to the underlying data.

This call borrows the UnsafeCell mutably (at compile-time) which guarantees that we possess the only reference.

Examples

use std::cell::UnsafeCell;

let mut c = UnsafeCell::new(5);
*c.get_mut() += 1;

assert_eq!(*c.get_mut(), 6);

Trait Implementations

impl<T: ?Sized, Token: TokenTrait> Deref for TokenCell<T, Token>

type Target = UnsafeCell<T>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<T: ?Sized, Token: TokenTrait> DerefMut for TokenCell<T, Token>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<T: ?Sized, Token: TokenTrait> TokenCellTrait<T, Token> for TokenCell<T, Token>

fn new(inner: T, token: &Token) -> Selfwhere T: Sized,

Constructs a new cell using token as its key.

fn try_guard<'l>( &'l self, token: &'l Token ) -> Result<TokenGuard<'l, T, Token>, <Token as TokenTrait>::ComparisonError>

Attempts to construct a guard which Derefs to the inner data, but also allows recovering the Token.

fn try_borrow<'l>( &'l self, token: &'l Token ) -> Result<&'l T, Token::ComparisonError>

Attempts to borrow the inner data.

fn try_guard_mut<'l>( &'l self, token: &'l mut Token ) -> Result<TokenGuardMut<'l, T, Token>, <Token as TokenTrait>::ComparisonError>

Attempts to construct a guard which DerefMuts to the inner data, but also allows recovering the Token.

fn try_borrow_mut<'l>( &'l self, token: &'l mut Token ) -> Result<&'l mut T, Token::ComparisonError>

Attempts to borrow the inner data mutably.

fn map<'a, U, F: FnOnce(TokenGuard<'a, T, Token>) -> U>( &'a self, f: F ) -> TokenMap<'a, T, U, F, Self, Token>

Constructs a lazy computation that can then be applied using the token.

fn map_mut<'a, U, F: FnOnce(TokenGuardMut<'a, T, Token>) -> U>( &'a self, f: F ) -> TokenMapMut<'a, T, U, F, Self, Token>

Constructs a lazy computation that can then be applied using the token.

impl<T: ?Sized, Token: TokenTrait> Sync for TokenCell<T, Token>