Struct SharedRwLock 

pub struct SharedRwLock {
    cell: Option<Arc<AtomicRefCell<SomethingZeroSizedButTyped>>>,
}

A shared read/write lock that can protect multiple objects.

We don’t need the blocking behavior, just the safety. As such we implement this with an AtomicRefCell, which is ~2x as fast as an RwLock, and panics (rather than deadlocking) when things go wrong (which is much easier to debug on CI).

Gecko also needs the ability to have “read only” SharedRwLocks, which are used for objects stored in (read only) shared memory. Attempting to acquire write access to objects protected by a read only SharedRwLock will panic.

Fields

cell: Option<Arc<AtomicRefCell<SomethingZeroSizedButTyped>>>

Implementations

impl SharedRwLock

pub fn new() -> Self

Create a new shared lock.

pub fn new_leaked() -> Self

Create a new global shared lock.

pub fn read_only() -> Self

Create a new read-only shared lock.

fn ptr(&self) -> *const SomethingZeroSizedButTyped

pub fn wrap<T>(&self, data: T) -> Locked<T>

Wrap the given data to make its access protected by this lock.

pub fn read(&self) -> SharedRwLockReadGuard<'_>

Obtain the lock for reading.

pub fn write(&self) -> SharedRwLockWriteGuard<'_>

Obtain the lock for writing.

Trait Implementations

impl Clone for SharedRwLock

fn clone(&self) -> SharedRwLock

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SharedRwLock

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

Formats the value using the given formatter.

impl MallocSizeOf for SharedRwLock

fn size_of(&self, _: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.