Struct bitflags::__core::sync::RwLockWriteGuard

#[must_use]
pub struct RwLockWriteGuard<'a, T> where T: 'a + ?Sized {
    // some fields omitted
}

RAII structure used to release the exclusive write access of a lock when dropped.

Methods

impl<'rwlock, T> RwLockWriteGuard<'rwlock, T> where T: ?Sized

fn map<U, F>(this: RwLockWriteGuard<'rwlock, T>, cb: F) -> RwLockWriteGuard<'rwlock, U> where F: FnOnce(&mut T) -> &mut U, U: ?Sized

Deprecated since 1.8.0

: unsound on Mutex because of Condvar and RwLock may also with to be used with Condvar one day

Transform this guard to hold a sub-borrow of the original data.

Applies the supplied closure to the data, returning a new lock guard referencing the borrow returned by the closure.

Examples

let x = RwLock::new(vec![1, 2]);

{
    let mut y = RwLockWriteGuard::map(x.write().unwrap(), |v| &mut v[0]);
    assert_eq!(*y, 1);

    *y = 10;
}

assert_eq!(&**x.read().unwrap(), &[10, 2]);

Trait Implementations

impl<'a, T> !Send for RwLockWriteGuard<'a, T> where T: ?Sized

impl<'rwlock, T> Deref for RwLockWriteGuard<'rwlock, T> where T: ?Sized

type Target = T

fn deref(&self) -> &T

impl<'rwlock, T> DerefMut for RwLockWriteGuard<'rwlock, T> where T: ?Sized

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

impl<'a, T> Drop for RwLockWriteGuard<'a, T> where T: ?Sized

fn drop(&mut self)