1 files changed, 20 insertions, 2 deletions
diff --git a/xpcom/base/CycleCollectedJSContext.h b/xpcom/base/CycleCollectedJSContext.h
index 2197eae92..4cd1479ed 100644
--- a/xpcom/base/CycleCollectedJSContext.h
+++ b/xpcom/base/CycleCollectedJSContext.h
@@ -33,6 +33,7 @@ struct Class;
 } // namespace js
 
 namespace mozilla {
+class AutoSlowOperation;
 
 class JSGCThingParticipant: public nsCycleCollectionParticipant
 {
@@ -134,6 +135,17 @@ struct CycleCollectorResults
   uint32_t mNumSlices;
 };
 
+class MicroTaskRunnable
+{
+public:
+  MicroTaskRunnable() {}
+  NS_INLINE_DECL_REFCOUNTING(MicroTaskRunnable)
+  virtual void Run(AutoSlowOperation& aAso) = 0;
+  virtual bool Suppressed() { return false; }
+protected:
+  virtual ~MicroTaskRunnable() {}
+};
+
 class CycleCollectedJSContext
 {
   friend class JSGCThingParticipant;
@@ -412,7 +424,7 @@ public:
   void LeaveMicroTask()
   {
     if (--mMicroTaskLevel == 0) {
-      PerformMainThreadMicroTaskCheckpoint();
+      PerformMicroTaskCheckPoint();
     }
   }
 
@@ -431,7 +443,9 @@ public:
     mMicroTaskLevel = aLevel;
   }
 
-  void PerformMainThreadMicroTaskCheckpoint();
+  void PerformMicroTaskCheckPoint();
+
+  void DispatchMicroTaskRunnable(already_AddRefed<MicroTaskRunnable> aRunnable);
 
   // Storage for watching rejected promises waiting for some client to
   // consume their rejection.
@@ -484,6 +498,10 @@ private:
   bool mDisableMicroTaskCheckpoint;
 
   uint32_t mMicroTaskLevel;
+  std::queue<RefPtr<MicroTaskRunnable>> mPendingMicroTaskRunnables;
+
+  uint32_t mMicroTaskRecursionDepth;
+
   OOMState mOutOfMemoryState;
   OOMState mLargeAllocationFailureState;