The Tor Browser: dom/plugins/ipc/PluginIdentifierParent.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2  * vim: sw=2 ts=2 et :

     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/. */

     7 #ifndef dom_plugins_PluginIdentifierParent_h

     8 #define dom_plugins_PluginIdentifierParent_h

    10 #include "mozilla/plugins/PPluginIdentifierParent.h"

    12 #include "npapi.h"

    13 #include "npruntime.h"

    15 namespace mozilla {

    16 namespace plugins {

    18 class PluginInstanceParent;

    20 class PluginIdentifierParent : public PPluginIdentifierParent

    21 {

    22   friend class PluginModuleParent;

    24 public:

    25   NPIdentifier ToNPIdentifier()

    26   {

    27     return mIdentifier;

    28   }

    30   bool IsTemporary() {

    31     return !!mTemporaryRefs;

    32   }

    34   /**

    35    * Holds a perhaps-temporary identifier for the current stack frame.

    36    */

    37   class MOZ_STACK_CLASS StackIdentifier

    38   {

    39   public:

    40     StackIdentifier(PluginInstanceParent* inst, NPIdentifier aIdentifier);

    41     StackIdentifier(NPObject* aObject, NPIdentifier aIdentifier);

    42     ~StackIdentifier();

    44     operator PluginIdentifierParent*() {

    45       return mIdentifier;

    46     }

    48   private:

    49     DISALLOW_COPY_AND_ASSIGN(StackIdentifier);

    51     PluginIdentifierParent* mIdentifier;

    52   };

    54 protected:

    55   PluginIdentifierParent(NPIdentifier aIdentifier, bool aTemporary)

    56     : mIdentifier(aIdentifier)

    57     , mTemporaryRefs(aTemporary ? 1 : 0)

    58   {

    59     MOZ_COUNT_CTOR(PluginIdentifierParent);

    60   }

    62   virtual ~PluginIdentifierParent()

    63   {

    64     MOZ_COUNT_DTOR(PluginIdentifierParent);

    65   }

    67   virtual bool RecvRetain() MOZ_OVERRIDE;

    69   void AddTemporaryRef() {

    70     mTemporaryRefs++;

    71   }

    73   /**

    74    * @returns true if the last temporary reference was removed.

    75    */

    76   bool RemoveTemporaryRef() {

    77     --mTemporaryRefs;

    78     return !mTemporaryRefs;

    79   }

    81 private:

    82   NPIdentifier mIdentifier;

    83   unsigned int mTemporaryRefs;

    84 };

    86 } // namespace plugins

    87 } // namespace mozilla

    89 #endif // dom_plugins_PluginIdentifierParent_h

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