Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef nsCCUncollectableMarker_h_
       8             : #define nsCCUncollectableMarker_h_
       9             : 
      10             : #include "js/TracingAPI.h"
      11             : #include "mozilla/Attributes.h"
      12             : #include "nsIObserver.h"
      13             : 
      14             : class nsCCUncollectableMarker final : public nsIObserver
      15             : {
      16             :   NS_DECL_ISUPPORTS
      17             :   NS_DECL_NSIOBSERVER
      18             : 
      19             :   /**
      20             :    * Inits a global nsCCUncollectableMarker. Should only be called once.
      21             :    */
      22             :   static nsresult Init();
      23             : 
      24             :   /**
      25             :    * Checks if we're collecting during a given generation
      26             :    */
      27           1 :   static bool InGeneration(uint32_t aGeneration)
      28             :   {
      29           1 :     return aGeneration && aGeneration == sGeneration;
      30             :   }
      31             : 
      32             :   template <class CCCallback>
      33           1 :   static bool InGeneration(CCCallback& aCb, uint32_t aGeneration)
      34             :   {
      35           1 :     return InGeneration(aGeneration) && !aCb.WantAllTraces();
      36             :   }
      37             : 
      38             :   static uint32_t sGeneration;
      39             : 
      40             : private:
      41           3 :   nsCCUncollectableMarker() {}
      42           0 :   ~nsCCUncollectableMarker() {}
      43             : };
      44             : 
      45             : namespace mozilla {
      46             : namespace dom {
      47             : void TraceBlackJS(JSTracer* aTrc, uint32_t aGCNumber, bool aIsShutdownGC);
      48             : } // namespace dom
      49             : } // namespace mozilla
      50             : 
      51             : #endif