[promisehook] Implement PromiseHook

include/v8.h

 // 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.
 
 /** \mainpage V8 API Reference Guide
  *
  * V8 is Google's open source JavaScript engine.
  *
  * This set of documents provides reference material generated from the
  * V8 header file, include/v8.h.
@@ skipping 5738 matching lines @@
     kAllocationActionAllocate = 1 << 0,
     kAllocationActionFree = 1 << 1,
     kAllocationActionAll = kAllocationActionAllocate | kAllocationActionFree
   };
 
 // --- Enter/Leave Script Callback ---
 typedef void (*BeforeCallEnteredCallback)(Isolate*);
 typedef void (*CallCompletedCallback)(Isolate*);
 typedef void (*DeprecatedCallCompletedCallback)();
 
+enum class PromiseHookType { kInit, kResolve, kBefore, kAfter };

[jochen (gone - plz use gerrit), 2016/12/16 09:36:41]

can you please add a comment explaining the different types?

[gsathya, 2016/12/16 18:04:25]

Done.

+
+typedef void (*PromiseHook)(PromiseHookType type, Local<Promise> promise,

[jochen (gone - plz use gerrit), 2016/12/16 09:36:41]

same here, what is parent?

[gsathya, 2016/12/16 18:04:25]

Done.

+                            Local<Value> parent);
+
 // --- Promise Reject Callback ---
 enum PromiseRejectEvent {
   kPromiseRejectWithNoHandler = 0,
   kPromiseHandlerAddedAfterReject = 1
 };
 
 class PromiseRejectMessage {
  public:
   PromiseRejectMessage(Local<Promise> promise, PromiseRejectEvent event,
                        Local<Value> value, Local<StackTrace> stack_trace)
@@ skipping 1091 matching lines @@
   /**
    * Removes callback that was installed by AddCallCompletedCallback.
    */
   void RemoveCallCompletedCallback(CallCompletedCallback callback);
   V8_DEPRECATE_SOON(
       "Use callback with parameter",
       void RemoveCallCompletedCallback(
           DeprecatedCallCompletedCallback callback));
 
   /**
+   * Experimental: Set the PromiseHook callback for various promise
+   * lifecycle events.
+   */
+  void SetPromiseHook(PromiseHook hook);
+
+  /**
    * Set callback to notify about promise reject with no handler, or
    * revocation of such a previous notification once the handler is added.
    */
   void SetPromiseRejectCallback(PromiseRejectCallback callback);
 
   /**
    * Experimental: Runs the Microtask Work Queue until empty
    * Any exceptions thrown by microtask callbacks are swallowed.
    */
   void RunMicrotasks();
@@ skipping 2824 matching lines @@
  */
 
 
 }  // namespace v8
 
 
 #undef TYPE_CHECK
 
 
 #endif  // INCLUDE_V8_H_