runtime/JSPromise.cpp

   1 /*
   2  * Copyright (C) 2013 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "JSPromise.h"
  28
  29 #if ENABLE(PROMISES)
  30
  31 #include "Error.h"
  32 #include "JSCJSValueInlines.h"
  33 #include "JSCellInlines.h"
  34 #include "JSPromiseConstructor.h"
  35 #include "Microtask.h"
  36 #include "SlotVisitorInlines.h"
  37 #include "StructureInlines.h"
  38
  39 namespace JSC {
  40
  41 const ClassInfo JSPromise::s_info = { "Promise", &Base::s_info, 0, CREATE_METHOD_TABLE(JSPromise) };
  42
  43 JSPromise* JSPromise::create(VM& vm, JSGlobalObject* globalObject)
  44 {
  45     JSPromise* promise = new (NotNull, allocateCell<JSPromise>(vm.heap)) JSPromise(vm, globalObject->promiseStructure());
  46     promise->finishCreation(vm);
  47     return promise;
  48 }
  49
  50 Structure* JSPromise::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  51 {
  52     return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
  53 }
  54
  55 JSPromise::JSPromise(VM& vm, Structure* structure)
  56     : JSNonFinalObject(vm, structure)
  57 {
  58 }
  59
  60 void JSPromise::finishCreation(VM& vm)
  61 {
  62     Base::finishCreation(vm);
  63     putDirect(vm, vm.propertyNames->promiseStatePrivateName, jsNumber(static_cast<unsigned>(Status::Pending)));
  64     putDirect(vm, vm.propertyNames->promiseFulfillReactionsPrivateName, jsUndefined());
  65     putDirect(vm, vm.propertyNames->promiseRejectReactionsPrivateName, jsUndefined());
  66     putDirect(vm, vm.propertyNames->promiseResultPrivateName, jsUndefined());
  67 }
  68
  69 auto JSPromise::status(VM& vm) const -> Status
  70 {
  71     JSValue value = getDirect(vm, vm.propertyNames->promiseStatePrivateName);
  72     ASSERT(value.isUInt32());
  73     return static_cast<Status>(value.asUInt32());
  74 }
  75
  76 JSValue JSPromise::result(VM& vm) const
  77 {
  78     return getDirect(vm, vm.propertyNames->promiseResultPrivateName);
  79 }
  80
  81 } // namespace JSC
  82
  83 #endif // ENABLE(PROMISES)