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d44b239621
We treat any mention of [[ArrayBufferByteLengthData]] and related atomic operations as FIXMEs to be fixed at a later date. We also add the HostGrowSharedArrayBuffer abstract operation, which will be overridden by LibWeb to grow shared WebAssembly memories.
81 lines
3 KiB
C++
81 lines
3 KiB
C++
/*
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* Copyright (c) 2023, Shannon Booth <shannon@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 <AK/TypeCasts.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/ArrayBuffer.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/SharedArrayBufferConstructor.h>
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#include <LibJS/Runtime/TypedArray.h>
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namespace JS {
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GC_DEFINE_ALLOCATOR(SharedArrayBufferConstructor);
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SharedArrayBufferConstructor::SharedArrayBufferConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.SharedArrayBuffer.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void SharedArrayBufferConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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Base::initialize(realm);
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// 25.2.4.1 SharedArrayBuffer.prototype, https://tc39.es/ecma262/#sec-sharedarraybuffer.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().shared_array_buffer_prototype(), 0);
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// 25.2.5.7 SharedArrayBuffer.prototype [ @@toStringTag ], https://tc39.es/ecma262/#sec-sharedarraybuffer.prototype.toString
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define_native_accessor(realm, vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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}
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// 25.2.3.1 SharedArrayBuffer ( length [ , options ] ), https://tc39.es/ecma262/#sec-sharedarraybuffer-length
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ThrowCompletionOr<Value> SharedArrayBufferConstructor::call()
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{
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auto& vm = this->vm();
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// 1. If NewTarget is undefined, throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.SharedArrayBuffer);
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}
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// 25.2.3.1 SharedArrayBuffer ( length [ , options ] ), https://tc39.es/ecma262/#sec-sharedarraybuffer-length
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ThrowCompletionOr<GC::Ref<Object>> SharedArrayBufferConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto length = vm.argument(0);
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auto options = vm.argument(1);
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// 2. Let byteLength be ? ToIndex(length).
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auto byte_length_or_error = length.to_index(vm);
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if (byte_length_or_error.is_error()) {
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auto error = byte_length_or_error.release_error();
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if (error.value().is_object() && is<RangeError>(error.value().as_object())) {
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// Re-throw more specific RangeError
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return vm.throw_completion<RangeError>(ErrorType::InvalidLength, "shared array buffer");
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}
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return error;
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}
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// 3. Let requestedMaxByteLength be ? GetArrayBufferMaxByteLengthOption(options).
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auto requested_max_byte_length = TRY(get_array_buffer_max_byte_length_option(vm, options));
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// 4. Return ? AllocateSharedArrayBuffer(NewTarget, byteLength, requestedMaxByteLength).
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return *TRY(allocate_shared_array_buffer(vm, new_target, byte_length_or_error.release_value(), requested_max_byte_length));
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}
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// 25.2.4.2 get SharedArrayBuffer [ @@species ], https://tc39.es/ecma262/#sec-sharedarraybuffer-@@species
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JS_DEFINE_NATIVE_FUNCTION(SharedArrayBufferConstructor::symbol_species_getter)
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{
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// 1. Return the this value.
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return vm.this_value();
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}
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}
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