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LibJS: Implement Atomics.store

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Timothy Flynn 2021-07-11 14:37:54 -04:00 • committed by Linus Groh
parent b6364ec899
commit 6211eb0f9a
4 changed files with 99 additions and 0 deletions
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37
Userland/Libraries/LibJS/Runtime/AtomicsObject.cpp
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@ -121,6 +121,7 @@ void AtomicsObject::initialize(GlobalObject& global_object)
define_native_function(vm.names.and_, and_, 3, attr);
define_native_function(vm.names.load, load, 2, attr);
define_native_function(vm.names.or_, or_, 3, attr);
define_native_function(vm.names.store, store, 3, attr);
define_native_function(vm.names.sub, sub, 3, attr);
define_native_function(vm.names.xor_, xor_, 3, attr);
@ -205,6 +206,42 @@ JS_DEFINE_NATIVE_FUNCTION(AtomicsObject::or_)
VERIFY_NOT_REACHED();
}
// 25.4.10 Atomics.store ( typedArray, index, value ), https://tc39.es/ecma262/#sec-atomics.store
JS_DEFINE_NATIVE_FUNCTION(AtomicsObject::store)
{
auto* typed_array = typed_array_from(global_object, vm.argument(0));
if (!typed_array)
return {};
validate_integer_typed_array(global_object, *typed_array);
if (vm.exception())
return {};
auto indexed_position = validate_atomic_access(global_object, *typed_array, vm.argument(1));
if (!indexed_position.has_value())
return {};
auto value = vm.argument(2);
Value value_to_set;
if (typed_array->content_type() == TypedArrayBase::ContentType::BigInt) {
value_to_set = value.to_bigint(global_object);
if (vm.exception())
return {};
} else {
value_to_set = Value(value.to_integer_or_infinity(global_object));
if (vm.exception())
return {};
}
if (typed_array->viewed_array_buffer()->is_detached()) {
vm.throw_exception<TypeError>(global_object, ErrorType::DetachedArrayBuffer);
return {};
}
typed_array->set_value_in_buffer(*indexed_position, value_to_set, ArrayBuffer::Order::SeqCst, true);
return value_to_set;
}
// 25.4.11 Atomics.sub ( typedArray, index, value ), https://tc39.es/ecma262/#sec-atomics.sub
JS_DEFINE_NATIVE_FUNCTION(AtomicsObject::sub)
{