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https://github.com/LadybirdBrowser/ladybird.git
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2ca7dfa649
The bytecode interpreter only needed the running execution context, but still threaded a separate Interpreter object through both the C++ and asm entry points. Move that state and the bytecode execution helpers onto VM instead, and teach the asm generator and slow paths to use VM directly.
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS {
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class GeneratorObject : public Object {
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JS_OBJECT(GeneratorObject, Object);
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GC_DECLARE_ALLOCATOR(GeneratorObject);
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public:
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static GC::Ref<GeneratorObject> create(Realm&, Variant<GC::Ref<ECMAScriptFunctionObject>, GC::Ref<NativeJavaScriptBackedFunction>>, NonnullOwnPtr<ExecutionContext>);
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virtual ~GeneratorObject() override = default;
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void visit_edges(Cell::Visitor&) override;
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struct IterationResult {
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IterationResult() = delete;
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explicit IterationResult(Value value, bool done)
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: done(done)
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, value(value)
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{
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}
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bool done { false };
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Value value;
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};
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ThrowCompletionOr<IterationResult> resume(VM&, Value value, Optional<StringView> const& generator_brand);
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ThrowCompletionOr<IterationResult> resume_abrupt(VM&, JS::Completion abrupt_completion, Optional<StringView> const& generator_brand);
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enum class GeneratorState {
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SuspendedStart,
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SuspendedYield,
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Executing,
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Completed,
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};
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GeneratorState generator_state() const { return m_generator_state; }
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void set_generator_state(GeneratorState generator_state) { m_generator_state = generator_state; }
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protected:
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GeneratorObject(Realm&, Object* prototype, NonnullOwnPtr<ExecutionContext>, Optional<StringView> generator_brand = {});
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ThrowCompletionOr<GeneratorState> validate(VM&, Optional<StringView> const& generator_brand);
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virtual ThrowCompletionOr<IterationResult> execute(VM&, JS::Completion const& completion);
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private:
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NonnullOwnPtr<ExecutionContext> m_execution_context;
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GC::Ptr<Bytecode::Executable> m_generating_executable;
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u32 m_yield_continuation { ExecutionContext::no_yield_continuation };
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GeneratorState m_generator_state { GeneratorState::SuspendedStart };
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Optional<StringView> m_generator_brand;
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};
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}
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