pub struct ReentrantMutex<R: RawMutex, G: GetThreadId, T: ?Sized> { /* private fields */ }
Expand description

A mutex which can be recursively locked by a single thread.

This type is identical to Mutex except for the following points:

  • Locking multiple times from the same thread will work correctly instead of deadlocking.
  • ReentrantMutexGuard does not give mutable references to the locked data. Use a RefCell if you need this.

See Mutex for more details about the underlying mutex primitive.

Implementations§

Creates a new reentrant mutex in an unlocked state ready for use.

Consumes this mutex, returning the underlying data.

Acquires a reentrant mutex, blocking the current thread until it is able to do so.

If the mutex is held by another thread then this function will block the local thread until it is available to acquire the mutex. If the mutex is already held by the current thread then this function will increment the lock reference count and return immediately. Upon returning, the thread is the only thread with the mutex held. An RAII guard is returned to allow scoped unlock of the lock. When the guard goes out of scope, the mutex will be unlocked.

Attempts to acquire this lock.

If the lock could not be acquired at this time, then None is returned. Otherwise, an RAII guard is returned. The lock will be unlocked when the guard is dropped.

This function does not block.

Returns a mutable reference to the underlying data.

Since this call borrows the ReentrantMutex mutably, no actual locking needs to take place—the mutable borrow statically guarantees no locks exist.

Forcibly unlocks the mutex.

This is useful when combined with mem::forget to hold a lock without the need to maintain a ReentrantMutexGuard object alive, for example when dealing with FFI.

Safety

This method must only be called if the current thread logically owns a ReentrantMutexGuard but that guard has be discarded using mem::forget. Behavior is undefined if a mutex is unlocked when not locked.

Returns the underlying raw mutex object.

Note that you will most likely need to import the RawMutex trait from lock_api to be able to call functions on the raw mutex.

Safety

This method is unsafe because it allows unlocking a mutex while still holding a reference to a ReentrantMutexGuard.

Forcibly unlocks the mutex using a fair unlock protocol.

This is useful when combined with mem::forget to hold a lock without the need to maintain a ReentrantMutexGuard object alive, for example when dealing with FFI.

Safety

This method must only be called if the current thread logically owns a ReentrantMutexGuard but that guard has be discarded using mem::forget. Behavior is undefined if a mutex is unlocked when not locked.

Attempts to acquire this lock until a timeout is reached.

If the lock could not be acquired before the timeout expired, then None is returned. Otherwise, an RAII guard is returned. The lock will be unlocked when the guard is dropped.

Attempts to acquire this lock until a timeout is reached.

If the lock could not be acquired before the timeout expired, then None is returned. Otherwise, an RAII guard is returned. The lock will be unlocked when the guard is dropped.

Trait Implementations§

Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more
Converts to this type from the input type.

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Converts to this type from the input type.

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.