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LibWeb: Implement WritableStreamDefaultWriter.releaseLock()
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5 changed files with 69 additions and 1 deletions
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@ -1334,6 +1334,25 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<WebIDL::Promise>> writable_stream_default_w
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return writable_stream_close(*stream);
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-writer-ensure-closed-promise-rejected
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void writable_stream_default_writer_ensure_closed_promise_rejected(WritableStreamDefaultWriter& writer, JS::Value error)
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{
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auto& realm = writer.realm();
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// 1. If writer.[[closedPromise]].[[PromiseState]] is "pending", reject writer.[[closedPromise]] with error.
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auto& closed_promise = verify_cast<JS::Promise>(*writer.closed_promise()->promise());
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if (closed_promise.state() == JS::Promise::State::Pending) {
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WebIDL::reject_promise(realm, *writer.closed_promise(), error);
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}
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// 2. Otherwise, set writer.[[closedPromise]] to a promise rejected with error.
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else {
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writer.set_closed_promise(WebIDL::create_rejected_promise(realm, error));
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}
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// 3. Set writer.[[closedPromise]].[[PromiseIsHandled]] to true.
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WebIDL::mark_promise_as_handled(*writer.closed_promise());
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-writer-ensure-ready-promise-rejected
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void writable_stream_default_writer_ensure_ready_promise_rejected(WritableStreamDefaultWriter& writer, JS::Value error)
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{
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@ -1374,6 +1393,36 @@ Optional<double> writable_stream_default_writer_get_desired_size(WritableStreamD
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return writable_stream_default_controller_get_desired_size(*stream->controller());
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-writer-release
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WebIDL::ExceptionOr<void> writable_stream_default_writer_release(WritableStreamDefaultWriter& writer)
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{
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// 1. Let stream be writer.[[stream]].
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auto stream = writer.stream();
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// 2. Assert: stream is not undefined.
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VERIFY(stream);
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// 3. Assert: stream.[[writer]] is writer.
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VERIFY(stream->writer().ptr() == &writer);
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// 4. Let releasedError be a new TypeError.
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auto released_error = MUST_OR_THROW_OOM(JS::TypeError::create(writer.realm(), "Writer's stream lock has been released"sv));
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// 5. Perform ! WritableStreamDefaultWriterEnsureReadyPromiseRejected(writer, releasedError).
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writable_stream_default_writer_ensure_ready_promise_rejected(writer, released_error);
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// 6. Perform ! WritableStreamDefaultWriterEnsureClosedPromiseRejected(writer, releasedError).
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writable_stream_default_writer_ensure_closed_promise_rejected(writer, released_error);
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// 7. Set stream.[[writer]] to undefined.
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stream->set_writer({});
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// 8. Set writer.[[stream]] to undefined.
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writer.set_stream({});
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return {};
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}
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// https://streams.spec.whatwg.org/#writable-stream-default-controller-advance-queue-if-needed
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WebIDL::ExceptionOr<void> writable_stream_default_controller_advance_queue_if_needed(WritableStreamDefaultController& controller)
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{
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