# RwLockReadGuard in spin::rw_lock - Rust
A guard that provides immutable data access.
Keywords: rust, rustlang, rust-lang, RwLockReadGuard

# Struct spin::rw_lock::RwLockReadGuard

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    pub struct RwLockReadGuard<'a, T: 'a + ?Sized> { /* private fields */ }

Expand description

A guard that provides immutable data access.

When the guard falls out of scope it will decrement the read count, potentially releasing the lock.

## Implementations

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### impl<'rwlock, T: ?Sized> RwLockReadGuard<'rwlock, T>

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#### pub fn leak(this: Self) -> &'rwlock T

Leak the lock guard, yielding a reference to the underlying data.

Note that this function will permanently lock the original lock for all but reading locks.

    let mylock = spin::RwLock::new(0);

    let data: &i32 = spin::RwLockReadGuard::leak(mylock.read());

    assert_eq!(*data, 0);

## Trait Implementations

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### impl<'rwlock, T: ?Sized + Debug> Debug for RwLockReadGuard<'rwlock, T>

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

Formats the value using the given formatter. Read more

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### impl<'rwlock, T: ?Sized> Deref for RwLockReadGuard<'rwlock, T>

#### type Target = T

The resulting type after dereferencing.

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#### fn deref(&self) -> &T

Dereferences the value.

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### impl<'rwlock, T: ?Sized + Display> Display for RwLockReadGuard<'rwlock, T>

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

Formats the value using the given formatter. Read more

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### impl<'rwlock, T: ?Sized> Drop for RwLockReadGuard<'rwlock, T>

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#### fn drop(&mut self)

Executes the destructor for this type. Read more

## Auto Trait Implementations

### impl<'a, T> !RefUnwindSafe for RwLockReadGuard<'a, T>

### impl<'a, T: ?Sized> Send for RwLockReadGuard<'a, T> where
T: Send + Sync,

### impl<'a, T: ?Sized> Sync for RwLockReadGuard<'a, T> where
T: Send + Sync,

### impl<'a, T: ?Sized> Unpin for RwLockReadGuard<'a, T>

### impl<'a, T> !UnwindSafe for RwLockReadGuard<'a, T>

## Blanket Implementations

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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<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### 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,

const: unstable · source

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

Mutably borrows from an owned value. Read more

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### impl<T> From<T> for T

const: unstable · source

#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### 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, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### 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 where
U: TryFrom<T>,

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.