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Avoid reference cycle between Client and its models

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This commit is contained in:
Antonio Scandurra 2022-03-01 10:49:40 +01:00
parent 471ecae82c
commit 10a872a370
2 changed files with 24 additions and 8 deletions
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19
crates/client/src/client.rs
View file

@ -133,9 +133,8 @@ struct ClientState {
entity_id_extractors: HashMap<TypeId, Box<dyn Send + Sync + Fn(&dyn AnyTypedEnvelope) -> u64>>,
_maintain_connection: Option<Task<()>>,
heartbeat_interval: Duration,
models_by_entity_type_and_remote_id: HashMap<(TypeId, u64), AnyWeakModelHandle>,
models_by_message_type: HashMap<TypeId, AnyModelHandle>,
models_by_message_type: HashMap<TypeId, AnyWeakModelHandle>,
model_types_by_message_type: HashMap<TypeId, TypeId>,
message_handlers: HashMap<
TypeId,
@ -348,18 +347,22 @@ impl Client {
{
let message_type_id = TypeId::of::<M>();
let client = self.clone();
let client = Arc::downgrade(self);
let mut state = self.state.write();
state
.models_by_message_type
.insert(message_type_id, model.into());
.insert(message_type_id, model.downgrade().into());
let prev_handler = state.message_handlers.insert(
message_type_id,
Arc::new(move |handle, envelope, cx| {
let model = handle.downcast::<E>().unwrap();
let envelope = envelope.into_any().downcast::<TypedEnvelope<M>>().unwrap();
if let Some(client) = client.upgrade() {
handler(model, *envelope, client.clone(), cx).boxed_local()
} else {
async move { Ok(()) }.boxed_local()
}
}),
);
if prev_handler.is_some() {
@ -385,7 +388,7 @@ impl Client {
let model_type_id = TypeId::of::<E>();
let message_type_id = TypeId::of::<M>();
let client = self.clone();
let client = Arc::downgrade(self);
let mut state = self.state.write();
state
.model_types_by_message_type
@ -408,7 +411,11 @@ impl Client {
Arc::new(move |handle, envelope, cx| {
let model = handle.downcast::<E>().unwrap();
let envelope = envelope.into_any().downcast::<TypedEnvelope<M>>().unwrap();
if let Some(client) = client.upgrade() {
handler(model, *envelope, client.clone(), cx).boxed_local()
} else {
async move { Ok(()) }.boxed_local()
}
}),
);
if prev_handler.is_some() {
@ -550,7 +557,7 @@ impl Client {
let model = state
.models_by_message_type
.get(&payload_type_id)
.cloned()
.and_then(|model| model.upgrade(&cx))
.or_else(|| {
let model_type_id =
*state.model_types_by_message_type.get(&payload_type_id)?;

9
crates/gpui/src/app.rs
View file

@ -3567,6 +3567,15 @@ impl AnyWeakModelHandle {
}
}
impl<T: Entity> From<WeakModelHandle<T>> for AnyWeakModelHandle {
fn from(handle: WeakModelHandle<T>) -> Self {
AnyWeakModelHandle {
model_id: handle.model_id,
model_type: TypeId::of::<T>(),
}
}
}
pub struct WeakViewHandle<T> {
window_id: usize,
view_id: usize,