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LibJS: Begin implementing Atomics

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This adds the Atomics object to the global object and sets up only its
@@toStringTag property.
This commit is contained in:
Timothy Flynn 2021-07-10 22:53:54 -04:00 committed by Linus Groh
parent df75c35d5b
commit a61723ec59
Notes: sideshowbarker 2024-07-18 09:02:42 +09:00 
Author: https://github.com/trflynn89
Commit: https://github.com/SerenityOS/serenity/commit/a61723ec599
Pull-request: https://github.com/SerenityOS/serenity/pull/8656
Reviewed-by: https://github.com/linusg ✅
6 changed files with 57 additions and 0 deletions
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1
Userland/Libraries/LibJS/CMakeLists.txt
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@ -35,6 +35,7 @@ set(SOURCES
Runtime/ArrayIterator.cpp
Runtime/ArrayIteratorPrototype.cpp
Runtime/ArrayPrototype.cpp
Runtime/AtomicsObject.cpp
Runtime/BigInt.cpp
Runtime/BigIntConstructor.cpp
Runtime/BigIntObject.cpp

27
Userland/Libraries/LibJS/Runtime/AtomicsObject.cpp Normal file
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@ -0,0 +1,27 @@
/*
* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AtomicsObject.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
AtomicsObject::AtomicsObject(GlobalObject& global_object)
: Object(*global_object.object_prototype())
{
}
void AtomicsObject::initialize(GlobalObject& global_object)
{
Object::initialize(global_object);
auto& vm = this->vm();
// 25.4.15 Atomics [ @@toStringTag ], https://tc39.es/ecma262/#sec-atomics-@@tostringtag
define_direct_property(*vm.well_known_symbol_to_string_tag(), js_string(global_object.heap(), "Atomics"), Attribute::Configurable);
}
}

22
Userland/Libraries/LibJS/Runtime/AtomicsObject.h Normal file
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@ -0,0 +1,22 @@
/*
* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Runtime/Object.h>
namespace JS {
class AtomicsObject : public Object {
JS_OBJECT(AtomicsObject, Object);
public:
explicit AtomicsObject(GlobalObject&);
virtual void initialize(GlobalObject&) override;
virtual ~AtomicsObject() override = default;
};
}

1
Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h
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@ -17,6 +17,7 @@ namespace JS {
P(__defineSetter__) \
P(__lookupGetter__) \
P(__lookupSetter__) \
P(Atomics) \
P(BYTES_PER_ELEMENT) \
P(BigInt) \
P(Boolean) \

2
Userland/Libraries/LibJS/Runtime/GlobalObject.cpp
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@ -20,6 +20,7 @@
#include <LibJS/Runtime/ArrayConstructor.h>
#include <LibJS/Runtime/ArrayIteratorPrototype.h>
#include <LibJS/Runtime/ArrayPrototype.h>
#include <LibJS/Runtime/AtomicsObject.h>
#include <LibJS/Runtime/BigIntConstructor.h>
#include <LibJS/Runtime/BigIntPrototype.h>
#include <LibJS/Runtime/BooleanConstructor.h>
@ -184,6 +185,7 @@ void GlobalObject::initialize_global_object()
define_direct_property(vm.names.globalThis, this, attr);
define_direct_property(vm.names.console, heap().allocate<ConsoleObject>(*this, *this), attr);
define_direct_property(vm.names.Atomics, heap().allocate<AtomicsObject>(*this, *this), attr);
define_direct_property(vm.names.Math, heap().allocate<MathObject>(*this, *this), attr);
define_direct_property(vm.names.JSON, heap().allocate<JSONObject>(*this, *this), attr);
define_direct_property(vm.names.Reflect, heap().allocate<ReflectObject>(*this, *this), attr);

4
Userland/Libraries/LibJS/Tests/builtins/Atomics/Atomics.@@toStringTag.js Normal file
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@ -0,0 +1,4 @@
test("basic functionality", () => {
expect(Atomics[Symbol.toStringTag]).toBe("Atomics");
expect(Atomics.toString()).toBe("[object Atomics]");
});