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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-04-10 09:28:39 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-04-10 09:28:39 +0000 |
commit | 32761a6cee1d0dee366b885b7b9c777e67885688 (patch) | |
tree | d6bec92bebfb216f4126356e55518842c2f476a1 /Source/JavaScriptCore/runtime/JSPromiseReaction.cpp | |
parent | a4e969f4965059196ca948db781e52f7cfebf19e (diff) | |
download | WebKitGtk-tarball-32761a6cee1d0dee366b885b7b9c777e67885688.tar.gz |
webkitgtk-2.4.11webkitgtk-2.4.11
Diffstat (limited to 'Source/JavaScriptCore/runtime/JSPromiseReaction.cpp')
-rw-r--r-- | Source/JavaScriptCore/runtime/JSPromiseReaction.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/JSPromiseReaction.cpp b/Source/JavaScriptCore/runtime/JSPromiseReaction.cpp new file mode 100644 index 000000000..62578e121 --- /dev/null +++ b/Source/JavaScriptCore/runtime/JSPromiseReaction.cpp @@ -0,0 +1,158 @@ +/* + * Copyright (C) 2013 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "JSPromiseReaction.h" + +#include "Error.h" +#include "JSCJSValueInlines.h" +#include "JSCellInlines.h" +#include "JSGlobalObject.h" +#include "JSPromiseDeferred.h" +#include "Microtask.h" +#include "SlotVisitorInlines.h" +#include "StrongInlines.h" + +namespace JSC { + +class ExecutePromiseReactionMicrotask final : public Microtask { +public: + ExecutePromiseReactionMicrotask(VM& vm, JSPromiseReaction* reaction, JSValue argument) + { + m_reaction.set(vm, reaction); + m_argument.set(vm, argument); + } + + virtual ~ExecutePromiseReactionMicrotask() + { + } + +private: + virtual void run(ExecState*) override; + + Strong<JSPromiseReaction> m_reaction; + Strong<Unknown> m_argument; +}; + +PassRefPtr<Microtask> createExecutePromiseReactionMicrotask(VM& vm, JSPromiseReaction* reaction, JSValue argument) +{ + return adoptRef(new ExecutePromiseReactionMicrotask(vm, reaction, argument)); +} + +void ExecutePromiseReactionMicrotask::run(ExecState* exec) +{ + // 1. Let 'deferred' be reaction.[[Deferred]]. + JSPromiseDeferred* deferred = m_reaction->deferred(); + + // 2. Let 'handler' be reaction.[[Handler]]. + JSValue handler = m_reaction->handler(); + + // 3. Let 'handlerResult' be the result of calling the [[Call]] internal method of + // handler passing undefined as thisArgument and a List containing argument as + // argumentsList. + + CallData handlerCallData; + CallType handlerCallType = getCallData(handler, handlerCallData); + ASSERT(handlerCallType != CallTypeNone); + + MarkedArgumentBuffer handlerArguments; + handlerArguments.append(m_argument.get()); + + JSValue handlerResult = call(exec, handler, handlerCallType, handlerCallData, jsUndefined(), handlerArguments); + + // 4. If handlerResult is an abrupt completion, return the result of calling the + // [[Call]] internal method of deferred.[[Reject]] passing undefined as thisArgument + // and a List containing handlerResult.[[value]] as argumentsList. + if (exec->hadException()) { + JSValue exception = exec->exception(); + exec->clearException(); + + performDeferredReject(exec, deferred, exception); + } + + // 5. Let 'handlerResult' be handlerResult.[[value]]. + // Note: Nothing to do. + + // 6. If SameValue(handlerResult, deferred.[[Promise]]) is true, + if (sameValue(exec, handlerResult, deferred->promise())) { + // i. Let 'selfResolutionError' be a newly-created TypeError object. + JSObject* selfResolutionError = createTypeError(exec, ASCIILiteral("Resolve a promise with itself")); + + // ii. Return the result of calling the [[Call]] internal method of deferred.[[Reject]] passing + // undefined as thisArgument and a List containing selfResolutionError as argumentsList. + performDeferredReject(exec, deferred, selfResolutionError); + } + + // 7. Let 'updateResult' be the result of calling UpdateDeferredFromPotentialThenable(handlerResult, deferred). + ThenableStatus updateResult = updateDeferredFromPotentialThenable(exec, handlerResult, deferred); + + // 8. ReturnIfAbrupt(updateResult). + if (exec->hadException()) + return; + + // 9. If 'updateResult' is "not a thenable", + if (updateResult == NotAThenable) { + // i. Return the result of calling the [[Call]] internal method of deferred.[[Resolve]] + // passing undefined as thisArgument and a List containing handlerResult as argumentsList. + performDeferredResolve(exec, deferred, handlerResult); + } +} + + +const ClassInfo JSPromiseReaction::s_info = { "JSPromiseReaction", 0, 0, 0, CREATE_METHOD_TABLE(JSPromiseReaction) }; + +JSPromiseReaction* JSPromiseReaction::create(VM& vm, JSPromiseDeferred* deferred, JSValue handler) +{ + JSPromiseReaction* promiseReaction = new (NotNull, allocateCell<JSPromiseReaction>(vm.heap)) JSPromiseReaction(vm); + promiseReaction->finishCreation(vm, deferred, handler); + return promiseReaction; +} + +JSPromiseReaction::JSPromiseReaction(VM& vm) + : Base(vm, vm.promiseReactionStructure.get()) +{ +} + +void JSPromiseReaction::finishCreation(VM& vm, JSPromiseDeferred* deferred, JSValue handler) +{ + Base::finishCreation(vm); + m_deferred.set(vm, this, deferred); + m_handler.set(vm, this, handler); +} + +void JSPromiseReaction::visitChildren(JSCell* cell, SlotVisitor& visitor) +{ + JSPromiseReaction* thisObject = jsCast<JSPromiseReaction*>(cell); + ASSERT_GC_OBJECT_INHERITS(thisObject, info()); + COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag); + ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren()); + + Base::visitChildren(thisObject, visitor); + + visitor.append(&thisObject->m_deferred); + visitor.append(&thisObject->m_handler); +} + +} // namespace JSC |