Move PromiseNextMicrotaskID to cpp

src/js/promise.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 (function(global, utils, extrasUtils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 30 matching lines @@
   SpeciesConstructor = from.SpeciesConstructor;
 });
 
 // -------------------------------------------------------------------
 
 // [[PromiseState]] values:
 const kPending = 0;
 const kFulfilled = +1;
 const kRejected = -1;
 
-var lastMicrotaskId = 0;
-
-function PromiseNextMicrotaskID() {
-  return ++lastMicrotaskId;
-}
-
 // ES#sec-createresolvingfunctions
 // CreateResolvingFunctions ( promise )
 function CreateResolvingFunctions(promise, debugEvent) {
   var alreadyResolved = false;
 
   // ES#sec-promise-resolve-functions
   // Promise Resolve Functions
   var resolve = value => {
     if (alreadyResolved === true) return;
     alreadyResolved = true;
@@ skipping 128 matching lines @@
     // different stacks from direct Promise use, but we save and restore a
     // stack once for all reactions. TODO(littledan): Improve this case.
     if (!IS_UNDEFINED(deferreds) &&
         HAS_PRIVATE(deferreds.promise, promiseHandledBySymbol) &&
         HAS_PRIVATE(GET_PRIVATE(deferreds.promise, promiseHandledBySymbol),
                     promiseAsyncStackIDSymbol)) {
       id = GET_PRIVATE(GET_PRIVATE(deferreds.promise, promiseHandledBySymbol),
                        promiseAsyncStackIDSymbol);
       name = "async function";
     } else {
-      id = PromiseNextMicrotaskID();
+      id = %DebugNextMicrotaskId();
       name = status === kFulfilled ? "Promise.resolve" : "Promise.reject";
       %DebugAsyncTaskEvent("enqueue", id, name);
     }
   }
   %EnqueuePromiseReactionJob(value, tasks, deferreds, id, name);
 }
 
 function PromiseAttachCallbacks(promise, deferred, onResolve, onReject) {
   var maybeResolveCallbacks =
       GET_PRIVATE(promise, promiseFulfillReactionsSymbol);
@@ skipping 84 matching lines @@
     }
 
     if (IS_CALLABLE(then)) {
       var callbacks = CreateResolvingFunctions(promise, false);
       var id, name, instrumenting = DEBUG_IS_ACTIVE;
       if (instrumenting) {
         if (IsPromise(resolution)) {
           // Mark the dependency of the new promise on the resolution
           SET_PRIVATE(resolution, promiseHandledBySymbol, promise);
         }
-        id = PromiseNextMicrotaskID();
+        id = %DebugNextMicrotaskId();
         name = "PromiseResolveThenableJob";
         %DebugAsyncTaskEvent("enqueue", id, name);
       }
       %EnqueuePromiseResolveThenableJob(
           resolution, then, callbacks.resolve, callbacks.reject, id, name);
       return;
     }
   }
   FulfillPromise(promise, kFulfilled, resolution,
                  promiseFulfillReactionsSymbol);
@@ skipping 359 matching lines @@
 utils.InstallFunctions(extrasUtils, 0, [
   "createPromise", PromiseCreate,
   "resolvePromise", ResolvePromise,
   "rejectPromise", DoRejectPromise
 ]);
 
 utils.Export(function(to) {
   to.IsPromise = IsPromise;
   to.PromiseCreate = PromiseCreate;
   to.PromiseThen = PromiseThen;
-  to.PromiseNextMicrotaskID = PromiseNextMicrotaskID;
 
   to.GlobalPromise = GlobalPromise;
   to.NewPromiseCapability = NewPromiseCapability;
   to.PerformPromiseThen = PerformPromiseThen;
   to.ResolvePromise = ResolvePromise;
   to.RejectPromise = RejectPromise;
 });
 
 })