michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * vim: sw=2 ts=2 et :
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 dom_plugins_PluginIdentifierParent_h
michael@0: #define dom_plugins_PluginIdentifierParent_h
michael@0: 
michael@0: #include "mozilla/plugins/PPluginIdentifierParent.h"
michael@0: 
michael@0: #include "npapi.h"
michael@0: #include "npruntime.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace plugins {
michael@0: 
michael@0: class PluginInstanceParent;
michael@0: 
michael@0: class PluginIdentifierParent : public PPluginIdentifierParent
michael@0: {
michael@0:   friend class PluginModuleParent;
michael@0: 
michael@0: public:
michael@0:   NPIdentifier ToNPIdentifier()
michael@0:   {
michael@0:     return mIdentifier;
michael@0:   }
michael@0: 
michael@0:   bool IsTemporary() {
michael@0:     return !!mTemporaryRefs;
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * Holds a perhaps-temporary identifier for the current stack frame.
michael@0:    */
michael@0:   class MOZ_STACK_CLASS StackIdentifier
michael@0:   {
michael@0:   public:
michael@0:     StackIdentifier(PluginInstanceParent* inst, NPIdentifier aIdentifier);
michael@0:     StackIdentifier(NPObject* aObject, NPIdentifier aIdentifier);
michael@0:     ~StackIdentifier();
michael@0: 
michael@0:     operator PluginIdentifierParent*() {
michael@0:       return mIdentifier;
michael@0:     }
michael@0: 
michael@0:   private:
michael@0:     DISALLOW_COPY_AND_ASSIGN(StackIdentifier);
michael@0: 
michael@0:     PluginIdentifierParent* mIdentifier;
michael@0:   };
michael@0: 
michael@0: protected:
michael@0:   PluginIdentifierParent(NPIdentifier aIdentifier, bool aTemporary)
michael@0:     : mIdentifier(aIdentifier)
michael@0:     , mTemporaryRefs(aTemporary ? 1 : 0)
michael@0:   {
michael@0:     MOZ_COUNT_CTOR(PluginIdentifierParent);
michael@0:   }
michael@0: 
michael@0:   virtual ~PluginIdentifierParent()
michael@0:   {
michael@0:     MOZ_COUNT_DTOR(PluginIdentifierParent);
michael@0:   }
michael@0: 
michael@0:   virtual bool RecvRetain() MOZ_OVERRIDE;
michael@0: 
michael@0:   void AddTemporaryRef() {
michael@0:     mTemporaryRefs++;
michael@0:   }
michael@0: 
michael@0:   /**
michael@0:    * @returns true if the last temporary reference was removed.
michael@0:    */
michael@0:   bool RemoveTemporaryRef() {
michael@0:     --mTemporaryRefs;
michael@0:     return !mTemporaryRefs;
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   NPIdentifier mIdentifier;
michael@0:   unsigned int mTemporaryRefs;
michael@0: };
michael@0: 
michael@0: } // namespace plugins
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // dom_plugins_PluginIdentifierParent_h