mirror of
https://github.com/RGBCube/serenity
synced 2025-05-15 07:24:58 +00:00
bfd354492e
With this change, we now have ~1200 CellAllocators across both LibJS and LibWeb in a normal WebContent instance. This gives us a minimum heap size of 4.7 MiB in the scenario where we only have one cell allocated per type. Of course, in practice there will be many more of each type, so the effective overhead is quite a bit smaller than that in practice. I left a few types unconverted to this mechanism because I got tired of doing this. :^)
99 lines
4.3 KiB
C++
99 lines
4.3 KiB
C++
/*
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* Copyright (c) 2023, Kenneth Myhra <kennethmyhra@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Streams/AbstractOperations.h>
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#include <LibWeb/Streams/TransformStream.h>
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#include <LibWeb/Streams/TransformStreamDefaultController.h>
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#include <LibWeb/Streams/Transformer.h>
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#include <LibWeb/Streams/WritableStream.h>
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#include <LibWeb/WebIDL/AbstractOperations.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::Streams {
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JS_DEFINE_ALLOCATOR(TransformStream);
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// https://streams.spec.whatwg.org/#ts-construct
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WebIDL::ExceptionOr<JS::NonnullGCPtr<TransformStream>> TransformStream::construct_impl(JS::Realm& realm, Optional<JS::Handle<JS::Object>> transformer_object, QueuingStrategy const& writable_strategy, QueuingStrategy const& readable_strategy)
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{
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auto& vm = realm.vm();
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auto stream = realm.heap().allocate<TransformStream>(realm, realm);
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// 1. If transformer is missing, set it to null.
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auto transformer = transformer_object.has_value() ? JS::Value { transformer_object.value().ptr() } : JS::js_null();
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// 2. Let transformerDict be transformer, converted to an IDL value of type Transformer.
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auto transformer_dict = TRY(Transformer::from_value(vm, transformer));
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// 3. If transformerDict["readableType"] exists, throw a RangeError exception.
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if (transformer_dict.readable_type.has_value())
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return WebIDL::SimpleException { WebIDL::SimpleExceptionType::RangeError, "Invalid use of reserved key 'readableType'"sv };
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// 4. If transformerDict["writableType"] exists, throw a RangeError exception.
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if (transformer_dict.writable_type.has_value())
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return WebIDL::SimpleException { WebIDL::SimpleExceptionType::RangeError, "Invalid use of reserved key 'writableType'"sv };
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// 5. Let readableHighWaterMark be ? ExtractHighWaterMark(readableStrategy, 0).
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auto readable_high_water_mark = TRY(extract_high_water_mark(readable_strategy, 0));
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// 6. Let readableSizeAlgorithm be ! ExtractSizeAlgorithm(readableStrategy).
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auto readable_size_algorithm = extract_size_algorithm(readable_strategy);
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// 7. Let writableHighWaterMark be ? ExtractHighWaterMark(writableStrategy, 1).
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auto writable_high_water_mark = TRY(extract_high_water_mark(writable_strategy, 1));
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// 8. Let writableSizeAlgorithm be ! ExtractSizeAlgorithm(writableStrategy).
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auto writable_size_algorithm = extract_size_algorithm(writable_strategy);
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// 9. Let startPromise be a new promise.
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auto start_promise = WebIDL::create_promise(realm);
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// 10. Perform ! InitializeTransformStream(this, startPromise, writableHighWaterMark, writableSizeAlgorithm,
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// readableHighWaterMark, readableSizeAlgorithm).
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TRY(initialize_transform_stream(*stream, start_promise, writable_high_water_mark, move(writable_size_algorithm), readable_high_water_mark, move(readable_size_algorithm)));
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// 11. Perform ? SetUpTransformStreamDefaultControllerFromTransformer(this, transformer, transformerDict).
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TRY(set_up_transform_stream_default_controller_from_transformer(*stream, transformer, transformer_dict));
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// 12. If transformerDict["start"] exists, then resolve startPromise with the result of invoking
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// transformerDict["start"] with argument list « this.[[controller]] » and callback this value transformer.
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if (transformer_dict.start) {
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auto result = MUST_OR_THROW_OOM(WebIDL::invoke_callback(*transformer_dict.start, transformer, stream->controller())).release_value();
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WebIDL::resolve_promise(realm, start_promise, result);
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}
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// 13. Otherwise, resolve startPromise with undefined.
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else {
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WebIDL::resolve_promise(realm, start_promise, JS::js_undefined());
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}
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return stream;
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}
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TransformStream::TransformStream(JS::Realm& realm)
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: Bindings::PlatformObject(realm)
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{
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}
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TransformStream::~TransformStream() = default;
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void TransformStream::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::TransformStreamPrototype>(realm, "TransformStream"));
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}
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void TransformStream::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_backpressure_change_promise);
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visitor.visit(m_controller);
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visitor.visit(m_readable);
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visitor.visit(m_writable);
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}
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}
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