зеркало из https://github.com/mozilla/pjs.git
353 строки
12 KiB
C++
353 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: sw=4 ts=4 et :
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Plugin App.
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*
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* The Initial Developer of the Original Code is
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* Ben Turner <bent.mozilla@gmail.com>.
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* Portions created by the Initial Developer are Copyright (C) 2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Jones <jones.chris.g@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef dom_plugins_PluginModuleChild_h
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#define dom_plugins_PluginModuleChild_h 1
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#include <string>
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#include <vector>
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#include "base/basictypes.h"
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#include "prlink.h"
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#include "npapi.h"
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#include "npfunctions.h"
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#include "nsAutoPtr.h"
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#include "nsDataHashtable.h"
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#include "nsTHashtable.h"
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#include "nsHashKeys.h"
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#include "mozilla/plugins/PPluginModuleChild.h"
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#include "mozilla/plugins/PluginInstanceChild.h"
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#include "mozilla/plugins/PluginIdentifierChild.h"
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// NOTE: stolen from nsNPAPIPlugin.h
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/*
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* Use this macro before each exported function
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* (between the return address and the function
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* itself), to ensure that the function has the
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* right calling conventions on OS/2.
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*/
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#ifdef XP_OS2
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#define NP_CALLBACK _System
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#else
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#define NP_CALLBACK
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#endif
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#if defined(XP_WIN)
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#define NS_NPAPIPLUGIN_CALLBACK(_type, _name) _type (__stdcall * _name)
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#elif defined(XP_OS2)
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#define NS_NPAPIPLUGIN_CALLBACK(_type, _name) _type (_System * _name)
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#else
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#define NS_NPAPIPLUGIN_CALLBACK(_type, _name) _type (* _name)
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#endif
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typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_GETENTRYPOINTS) (NPPluginFuncs* pCallbacks);
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typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_PLUGININIT) (const NPNetscapeFuncs* pCallbacks);
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typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_PLUGINUNIXINIT) (const NPNetscapeFuncs* pCallbacks, NPPluginFuncs* fCallbacks);
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typedef NS_NPAPIPLUGIN_CALLBACK(NPError, NP_PLUGINSHUTDOWN) (void);
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namespace mozilla {
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namespace plugins {
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#ifdef MOZ_WIDGET_QT
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class NestedLoopTimer;
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static const int kNestedLoopDetectorIntervalMs = 90;
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#endif
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class PluginScriptableObjectChild;
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class PluginInstanceChild;
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class PluginModuleChild : public PPluginModuleChild
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{
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protected:
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NS_OVERRIDE
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virtual mozilla::ipc::RPCChannel::RacyRPCPolicy
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MediateRPCRace(const Message& parent, const Message& child)
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{
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return MediateRace(parent, child);
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}
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// Implement the PPluginModuleChild interface
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virtual bool AnswerNP_Initialize(NativeThreadId* tid, NPError* rv);
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virtual PPluginIdentifierChild*
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AllocPPluginIdentifier(const nsCString& aString,
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const int32_t& aInt);
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virtual bool
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DeallocPPluginIdentifier(PPluginIdentifierChild* aActor);
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virtual PPluginInstanceChild*
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AllocPPluginInstance(const nsCString& aMimeType,
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const uint16_t& aMode,
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const nsTArray<nsCString>& aNames,
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const nsTArray<nsCString>& aValues,
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NPError* rv);
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virtual bool
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DeallocPPluginInstance(PPluginInstanceChild* aActor);
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virtual bool
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AnswerPPluginInstanceConstructor(PPluginInstanceChild* aActor,
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const nsCString& aMimeType,
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const uint16_t& aMode,
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const nsTArray<nsCString>& aNames,
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const nsTArray<nsCString>& aValues,
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NPError* rv);
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virtual bool
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AnswerNP_Shutdown(NPError *rv);
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virtual void
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ActorDestroy(ActorDestroyReason why);
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public:
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PluginModuleChild();
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virtual ~PluginModuleChild();
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bool Init(const std::string& aPluginFilename,
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base::ProcessHandle aParentProcessHandle,
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MessageLoop* aIOLoop,
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IPC::Channel* aChannel);
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void CleanUp();
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const char* GetUserAgent();
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static const NPNetscapeFuncs sBrowserFuncs;
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static PluginModuleChild* current();
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bool RegisterActorForNPObject(NPObject* aObject,
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PluginScriptableObjectChild* aActor);
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void UnregisterActorForNPObject(NPObject* aObject);
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PluginScriptableObjectChild* GetActorForNPObject(NPObject* aObject);
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#ifdef DEBUG
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bool NPObjectIsRegistered(NPObject* aObject);
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#endif
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/**
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* The child implementation of NPN_CreateObject.
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*/
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static NPObject* NP_CALLBACK NPN_CreateObject(NPP aNPP, NPClass* aClass);
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/**
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* The child implementation of NPN_RetainObject.
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*/
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static NPObject* NP_CALLBACK NPN_RetainObject(NPObject* aNPObj);
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/**
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* The child implementation of NPN_ReleaseObject.
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*/
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static void NP_CALLBACK NPN_ReleaseObject(NPObject* aNPObj);
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/**
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* The child implementations of NPIdentifier-related functions.
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*/
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static NPIdentifier NP_CALLBACK NPN_GetStringIdentifier(const NPUTF8* aName);
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static void NP_CALLBACK NPN_GetStringIdentifiers(const NPUTF8** aNames,
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int32_t aNameCount,
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NPIdentifier* aIdentifiers);
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static NPIdentifier NP_CALLBACK NPN_GetIntIdentifier(int32_t aIntId);
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static bool NP_CALLBACK NPN_IdentifierIsString(NPIdentifier aIdentifier);
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static NPUTF8* NP_CALLBACK NPN_UTF8FromIdentifier(NPIdentifier aIdentifier);
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static int32_t NP_CALLBACK NPN_IntFromIdentifier(NPIdentifier aIdentifier);
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private:
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bool InitGraphics();
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#if defined(MOZ_WIDGET_GTK2)
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static gboolean DetectNestedEventLoop(gpointer data);
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static gboolean ProcessBrowserEvents(gpointer data);
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NS_OVERRIDE
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virtual void EnteredCxxStack();
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NS_OVERRIDE
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virtual void ExitedCxxStack();
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#elif defined(MOZ_WIDGET_QT)
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NS_OVERRIDE
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virtual void EnteredCxxStack();
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NS_OVERRIDE
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virtual void ExitedCxxStack();
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#endif
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std::string mPluginFilename;
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PRLibrary* mLibrary;
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nsCString mUserAgent;
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// we get this from the plugin
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NP_PLUGINSHUTDOWN mShutdownFunc;
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#ifdef OS_LINUX
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NP_PLUGINUNIXINIT mInitializeFunc;
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#elif defined(OS_WIN) || defined(OS_MACOSX)
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NP_PLUGININIT mInitializeFunc;
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NP_GETENTRYPOINTS mGetEntryPointsFunc;
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#endif
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NPPluginFuncs mFunctions;
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NPSavedData mSavedData;
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#if defined(MOZ_WIDGET_GTK2)
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// If a plugin spins a nested glib event loop in response to a
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// synchronous IPC message from the browser, the loop might break
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// only after the browser responds to a request sent by the
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// plugin. This can happen if a plugin uses gtk's synchronous
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// copy/paste, for example. But because the browser is blocked on
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// a condvar, it can't respond to the request. This situation
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// isn't technically a deadlock, but the symptoms are basically
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// the same from the user's perspective.
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//
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// We take two steps to prevent this
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//
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// (1) Detect nested event loops spun by the plugin. This is
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// done by scheduling a glib timer event in the plugin
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// process whenever the browser might block on the plugin.
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// If the plugin indeed spins a nested loop, this timer event
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// will fire "soon" thereafter.
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//
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// (2) When a nested loop is detected, deschedule the
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// nested-loop-detection timer and in its place, schedule
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// another timer that periodically calls back into the
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// browser and spins a mini event loop. This mini event loop
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// processes a handful of pending native events.
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//
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// Because only timer (1) or (2) (or neither) may be active at any
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// point in time, we use the same member variable
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// |mNestedLoopTimerId| to refer to both.
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//
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// When the browser no longer might be blocked on a plugin's IPC
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// response, we deschedule whichever of (1) or (2) is active.
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guint mNestedLoopTimerId;
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# ifdef DEBUG
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// Depth of the stack of calls to g_main_context_dispatch before any
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// nested loops are run. This is 1 when IPC calls are dispatched from
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// g_main_context_iteration, or 0 when dispatched directly from
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// MessagePumpForUI.
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int mTopLoopDepth;
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# endif
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#elif defined (MOZ_WIDGET_QT)
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NestedLoopTimer *mNestedLoopTimerObject;
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#endif
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struct NPObjectData : public nsPtrHashKey<NPObject>
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{
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NPObjectData(const NPObject* key)
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: nsPtrHashKey<NPObject>(key)
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, instance(NULL)
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, actor(NULL)
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{ }
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// never NULL
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PluginInstanceChild* instance;
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// sometimes NULL (no actor associated with an NPObject)
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PluginScriptableObjectChild* actor;
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};
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/**
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* mObjectMap contains all the currently active NPObjects (from NPN_CreateObject until the
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* final release/dealloc, whether or not an actor is currently associated with the object.
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*/
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nsTHashtable<NPObjectData> mObjectMap;
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nsDataHashtable<nsCStringHashKey, PluginIdentifierChild*> mStringIdentifiers;
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nsDataHashtable<nsUint32HashKey, PluginIdentifierChild*> mIntIdentifiers;
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public: // called by PluginInstanceChild
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/**
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* Dealloc an NPObject after last-release or when the associated instance
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* is destroyed. This function will remove the object from mObjectMap.
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*/
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static void DeallocNPObject(NPObject* o);
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NPError NPP_Destroy(PluginInstanceChild* instance) {
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return mFunctions.destroy(instance->GetNPP(), 0);
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}
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/**
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* Fill PluginInstanceChild.mDeletingHash with all the remaining NPObjects
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* associated with that instance.
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*/
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void FindNPObjectsForInstance(PluginInstanceChild* instance);
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private:
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static PLDHashOperator CollectForInstance(NPObjectData* d, void* userArg);
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#if defined(OS_WIN)
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NS_OVERRIDE
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virtual void EnteredCall();
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NS_OVERRIDE
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virtual void ExitedCall();
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// Entered/ExitedCall notifications keep track of whether the plugin has
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// entered a nested event loop within this RPC call.
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struct IncallFrame
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{
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IncallFrame()
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: _spinning(false)
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, _savedNestableTasksAllowed(false)
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{ }
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bool _spinning;
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bool _savedNestableTasksAllowed;
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};
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nsAutoTArray<IncallFrame, 8> mIncallPumpingStack;
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static LRESULT CALLBACK NestedInputEventHook(int code,
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WPARAM wParam,
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LPARAM lParam);
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static LRESULT CALLBACK CallWindowProcHook(int code,
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WPARAM wParam,
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LPARAM lParam);
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void SetEventHooks();
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void ResetEventHooks();
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HHOOK mNestedEventHook;
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HHOOK mGlobalCallWndProcHook;
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#endif
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};
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} /* namespace plugins */
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} /* namespace mozilla */
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#endif // ifndef dom_plugins_PluginModuleChild_h
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