michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsCCUncollectableMarker_h_
michael@0: #define nsCCUncollectableMarker_h_
michael@0: 
michael@0: #include "js/TracingAPI.h"
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsIObserver.h"
michael@0: 
michael@0: class nsCCUncollectableMarker MOZ_FINAL : public nsIObserver
michael@0: {
michael@0:   NS_DECL_ISUPPORTS
michael@0:   NS_DECL_NSIOBSERVER
michael@0: 
michael@0:   /**
michael@0:    * Inits a global nsCCUncollectableMarker. Should only be called once.
michael@0:    */
michael@0:   static nsresult Init();
michael@0: 
michael@0:   /**
michael@0:    * Checks if we're collecting during a given generation
michael@0:    */
michael@0:   static bool InGeneration(uint32_t aGeneration)
michael@0:   {
michael@0:     return aGeneration && aGeneration == sGeneration;
michael@0:   }
michael@0: 
michael@0:   template <class CCCallback>
michael@0:   static bool InGeneration(CCCallback& aCb, uint32_t aGeneration)
michael@0:   {
michael@0:     return InGeneration(aGeneration) && !aCb.WantAllTraces();
michael@0:   }
michael@0: 
michael@0:   static uint32_t sGeneration;
michael@0: 
michael@0: private:
michael@0:   nsCCUncollectableMarker() {}
michael@0: 
michael@0: };
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: void TraceBlackJS(JSTracer* aTrc, uint32_t aGCNumber, bool aIsShutdownGC);
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif