blob: 399c93606bfcb75f5f326baf32af2ec788f446c6 [file] [log] [blame]
/*
* Copyright (C) 2013-2017 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 "JSPromise.h"
#include "BuiltinNames.h"
#include "Error.h"
#include "JSCInlines.h"
#include "JSInternalFieldObjectImplInlines.h"
#include "JSPromiseConstructor.h"
#include "Microtask.h"
namespace JSC {
const ClassInfo JSPromise::s_info = { "Promise", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSPromise) };
JSPromise* JSPromise::create(VM& vm, Structure* structure)
{
JSPromise* promise = new (NotNull, allocateCell<JSPromise>(vm.heap)) JSPromise(vm, structure);
promise->finishCreation(vm);
return promise;
}
Structure* JSPromise::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(JSPromiseType, StructureFlags), info());
}
JSPromise::JSPromise(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
void JSPromise::finishCreation(VM& vm)
{
Base::finishCreation(vm);
internalField(static_cast<unsigned>(Field::Flags)).set(vm, this, jsNumber(static_cast<unsigned>(Status::Pending)));
internalField(static_cast<unsigned>(Field::ReactionsOrResult)).set(vm, this, jsUndefined());
}
void JSPromise::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
auto* thisObject = jsCast<JSPromise*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
}
auto JSPromise::status(VM&) const -> Status
{
JSValue value = internalField(static_cast<unsigned>(Field::Flags)).get();
uint32_t flags = value.asUInt32AsAnyInt();
return static_cast<Status>(flags & stateMask);
}
JSValue JSPromise::result(VM& vm) const
{
Status status = this->status(vm);
if (status == Status::Pending)
return jsUndefined();
return internalField(static_cast<unsigned>(Field::ReactionsOrResult)).get();
}
bool JSPromise::isHandled(VM&) const
{
JSValue value = internalField(static_cast<unsigned>(Field::Flags)).get();
uint32_t flags = value.asUInt32AsAnyInt();
return flags & isHandledFlag;
}
JSPromise* JSPromise::resolve(JSGlobalObject& globalObject, JSValue value)
{
auto* exec = globalObject.globalExec();
auto& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* promiseResolveFunction = globalObject.promiseResolveFunction();
CallData callData;
auto callType = JSC::getCallData(vm, promiseResolveFunction, callData);
ASSERT(callType != CallType::None);
MarkedArgumentBuffer arguments;
arguments.append(value);
ASSERT(!arguments.hasOverflowed());
auto result = call(exec, promiseResolveFunction, callType, callData, globalObject.promiseConstructor(), arguments);
RETURN_IF_EXCEPTION(scope, nullptr);
ASSERT(result.inherits<JSPromise>(vm));
return jsCast<JSPromise*>(result);
}
} // namespace JSC