110 lines
4.7 KiB
C++
110 lines
4.7 KiB
C++
/*
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* Copyright (C) 2020 Apple, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "FinalizationRegistryPrototype.h"
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#include "Error.h"
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#include "JSCInlines.h"
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#include "JSFinalizationRegistry.h"
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namespace JSC {
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const ClassInfo FinalizationRegistryPrototype::s_info = { "FinalizationRegistry", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(FinalizationRegistryPrototype) };
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static JSC_DECLARE_HOST_FUNCTION(protoFuncFinalizationRegistryRegister);
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static JSC_DECLARE_HOST_FUNCTION(protoFuncFinalizationRegistryUnregister);
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void FinalizationRegistryPrototype::finishCreation(VM& vm, JSGlobalObject* globalObject)
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{
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Base::finishCreation(vm);
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ASSERT(inherits(vm, info()));
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// We can't make this a property name because it's a resevered word in C++...
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JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(Identifier::fromString(vm, "register"), protoFuncFinalizationRegistryRegister, static_cast<unsigned>(PropertyAttribute::DontEnum), 2);
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JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(Identifier::fromString(vm, "unregister"), protoFuncFinalizationRegistryUnregister, static_cast<unsigned>(PropertyAttribute::DontEnum), 1);
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JSC_TO_STRING_TAG_WITHOUT_TRANSITION();
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}
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ALWAYS_INLINE static JSFinalizationRegistry* getFinalizationRegistry(VM& vm, JSGlobalObject* globalObject, JSValue value)
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{
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auto scope = DECLARE_THROW_SCOPE(vm);
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if (UNLIKELY(!value.isObject())) {
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throwTypeError(globalObject, scope, "Called FinalizationRegistry function on non-object"_s);
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return nullptr;
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}
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auto* group = jsDynamicCast<JSFinalizationRegistry*>(vm, asObject(value));
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if (LIKELY(group))
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return group;
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throwTypeError(globalObject, scope, "Called FinalizationRegistry function on a non-FinalizationRegistry object"_s);
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return nullptr;
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}
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JSC_DEFINE_HOST_FUNCTION(protoFuncFinalizationRegistryRegister, (JSGlobalObject* globalObject, CallFrame* callFrame))
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{
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VM& vm = globalObject->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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auto* group = getFinalizationRegistry(vm, globalObject, callFrame->thisValue());
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RETURN_IF_EXCEPTION(scope, { });
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JSValue target = callFrame->argument(0);
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if (!target.isObject())
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return throwVMTypeError(globalObject, scope, "register requires an object as the target"_s);
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JSValue holdings = callFrame->argument(1);
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if (target == holdings)
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return throwVMTypeError(globalObject, scope, "register expects the target object and the holdings parameter are not the same. Otherwise, the target can never be collected"_s);
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JSValue unregisterToken = callFrame->argument(2);
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if (!unregisterToken.isUndefined() && !unregisterToken.isObject())
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return throwVMTypeError(globalObject, scope, "register requires an object as the unregistration token"_s);
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group->registerTarget(vm, target.getObject(), holdings, unregisterToken);
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return encodedJSUndefined();
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}
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JSC_DEFINE_HOST_FUNCTION(protoFuncFinalizationRegistryUnregister, (JSGlobalObject* globalObject, CallFrame* callFrame))
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{
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VM& vm = globalObject->vm();
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auto scope = DECLARE_THROW_SCOPE(vm);
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auto* group = getFinalizationRegistry(vm, globalObject, callFrame->thisValue());
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RETURN_IF_EXCEPTION(scope, { });
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if (auto* token = jsDynamicCast<JSObject*>(vm, callFrame->argument(0))) {
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bool result = group->unregister(vm, token);
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return JSValue::encode(jsBoolean(result));
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}
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return throwVMTypeError(globalObject, scope, "unregister requires an object is the unregistration token"_s);
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}
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}
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