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https://github.com/LadybirdBrowser/ladybird.git
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4c2b4c1a27
This object is responsible for handling async functions in bytecode, and this commit fully rewrites it, now it does: * creates and keeps alive a top level promise, which callers can attach their `then` clauses * creates and clear a handle to itself, to assure that it does not get garbage collected * properly handles all possible ways a async function could halt and when possible continues the execution immediately
40 lines
1.2 KiB
C++
40 lines
1.2 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/Bytecode/Interpreter.h>
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/GeneratorObject.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/Runtime/Promise.h>
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namespace JS {
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class AsyncFunctionDriverWrapper final : public Promise {
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JS_OBJECT(AsyncFunctionDriverWrapper, Promise);
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public:
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static ThrowCompletionOr<Value> create(Realm&, GeneratorObject*);
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virtual ~AsyncFunctionDriverWrapper() override = default;
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void visit_edges(Cell::Visitor&) override;
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void continue_async_execution(VM&, Value, bool is_successful);
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private:
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AsyncFunctionDriverWrapper(Realm&, NonnullGCPtr<GeneratorObject>, NonnullGCPtr<Promise> top_level_promise);
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bool m_expect_promise { false };
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NonnullGCPtr<GeneratorObject> m_generator_object;
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NonnullGCPtr<NativeFunction> m_on_fulfillment;
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NonnullGCPtr<NativeFunction> m_on_rejection;
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NonnullGCPtr<Promise> m_top_level_promise;
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GCPtr<Promise> m_current_promise { nullptr };
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Handle<AsyncFunctionDriverWrapper> m_self_handle;
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};
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}
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