Struct std::sync::MutexGuard

1.0.0 · source ·
pub struct MutexGuard<'a, T: ?Sized + 'a> { /* private fields */ }
Expand description

An RAII implementation of a “scoped lock” of a mutex. When this structure is dropped (falls out of scope), the lock will be unlocked.

The data protected by the mutex can be accessed through this guard via its Deref and DerefMut implementations.

This structure is created by the lock and try_lock methods on Mutex.

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impl<'a, T: ?Sized> MutexGuard<'a, T>

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pub fn map<U, F>(orig: Self, f: F) -> MappedMutexGuard<'a, U>
where F: FnOnce(&mut T) -> &mut U, U: ?Sized,

🔬This is a nightly-only experimental API. (mapped_lock_guards #117108)

Makes a MappedMutexGuard for a component of the borrowed data, e.g. an enum variant.

The Mutex is already locked, so this cannot fail.

This is an associated function that needs to be used as MutexGuard::map(...). A method would interfere with methods of the same name on the contents of the MutexGuard used through Deref.

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pub fn try_map<U, F>(orig: Self, f: F) -> Result<MappedMutexGuard<'a, U>, Self>
where F: FnOnce(&mut T) -> Option<&mut U>, U: ?Sized,

🔬This is a nightly-only experimental API. (mapped_lock_guards #117108)

Makes a MappedMutexGuard for a component of the borrowed data. The original guard is returned as an Err(...) if the closure returns None.

The Mutex is already locked, so this cannot fail.

This is an associated function that needs to be used as MutexGuard::try_map(...). A method would interfere with methods of the same name on the contents of the MutexGuard used through Deref.

Trait Implementations§

1.16.0 · source§

impl<T: ?Sized + Debug> Debug for MutexGuard<'_, 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<T: ?Sized> Deref for MutexGuard<'_, T>

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type Target = T

The resulting type after dereferencing.
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fn deref(&self) -> &T

Dereferences the value.
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impl<T: ?Sized> DerefMut for MutexGuard<'_, T>

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

Mutably dereferences the value.
1.20.0 · source§

impl<T: ?Sized + Display> Display for MutexGuard<'_, 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<T: ?Sized> Drop for MutexGuard<'_, T>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<T: ?Sized> !Send for MutexGuard<'_, T>

1.19.0 · source§

impl<T: ?Sized + Sync> Sync for MutexGuard<'_, T>

Auto Trait Implementations§

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impl<'a, T: ?Sized> RefUnwindSafe for MutexGuard<'a, T>

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

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impl<'a, T: ?Sized> UnwindSafe for MutexGuard<'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,

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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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<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
where U: TryFrom<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.