Valentin Shergin c25d5948a5 Fabric: Exposing EventEmitter's ownership model as a shared_ptr ...

Summary:
As we did in the previous diff, here we implemented `EventEmitter`'s ownership model as a `shared_ptr`. This change fixes problem with leaking `WeakObject`s which happens on hot-reload.

So, in short:
 * `EventTargetWrapper` object owns `jsi::WeakObject` that can be converted to actual `jsi::Object` that represent event target in JavaScript realm;
 * `EventTargetWrapper` and `jsi::WeakObject` objects must be deallocated as soon as native part does not need them anymore;
 * `EventEmitter` objects retain `EventTarget` objects;
 * `EventEmitter` can loose event target object in case if assosiated `ShadowNode` got unmounted (not deallocated); in this case `EventEmitter` is loosing possibility to dispatch event even if some mounting-layer code is still retaining it.

Reviewed By: mdvacca

Differential Revision: D9762755

fbshipit-source-id: 96e989767a32914db9f4627fce51b044c71f257a

2018-09-13 23:02:37 -07:00

..

ComponentDescriptor.h

Fabric: Exposing EventEmitter's ownership model as a shared_ptr

2018-09-13 23:02:37 -07:00

ConcreteComponentDescriptor.h

Fabric: Exposing EventEmitter's ownership model as a shared_ptr

2018-09-13 23:02:37 -07:00