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// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef CHROME_COMMON_CHROME_PLUGIN_LIB_H__
#define CHROME_COMMON_CHROME_PLUGIN_LIB_H__
#include <hash_map>
#include <string>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "chrome/common/chrome_plugin_api.h"
// A ChromePluginLib is a single Chrome Plugin Library.
// This class is used in the browser process (IO thread), and the plugin process
// (plugin thread). It should not be accessed on other threads, because it
// issues a NOTIFY_CHROME_PLUGIN_UNLOADED notification.
class ChromePluginLib : public base::RefCounted<ChromePluginLib> {
public:
static ChromePluginLib* Create(const std::wstring& filename,
const CPBrowserFuncs* bfuncs);
static ChromePluginLib* Find(const std::wstring& filename);
static void Destroy(const std::wstring& filename);
static bool IsPluginThread();
static ChromePluginLib* FromCPID(CPID id) {
return reinterpret_cast<ChromePluginLib*>(id);
}
// Adds Chrome plugins to the NPAPI plugin list.
static void RegisterPluginsWithNPAPI();
// Loads all the plugin dlls that are marked as "LoadOnStartup" in the
// registry. This should only be called in the browser process.
static void LoadChromePlugins(const CPBrowserFuncs* bfuncs);
// Unloads all the loaded plugin dlls and cleans up the plugin map.
static void UnloadAllPlugins();
// Returns true if the plugin is currently loaded.
const bool is_loaded() const { return initialized_; }
// Get the Plugin's function pointer table.
const CPPluginFuncs& functions() const {
DCHECK(initialized_);
DCHECK(IsPluginThread());
return plugin_funcs_;
}
CPID cpid() { return reinterpret_cast<CPID>(this); }
const std::wstring& filename() { return filename_; }
// Plugin API functions
// Method to call a test function in the plugin, used for unit tests.
int CP_Test(void* param);
// The registroy path to search for Chrome Plugins/
static const TCHAR kRegistryChromePlugins[];
private:
friend class base::RefCounted<ChromePluginLib>;
ChromePluginLib(const std::wstring& filename);
~ChromePluginLib();
// Method to initialize a Plugin.
// Initialize can be safely called multiple times.
bool CP_Initialize(const CPBrowserFuncs* bfuncs);
// Method to shutdown a Plugin.
void CP_Shutdown();
// Attempts to load the plugin from the DLL.
// Returns true if it is a legitimate plugin, false otherwise
bool Load();
// Unloading the plugin DLL.
void Unload();
std::wstring filename_; // the path to the DLL
HMODULE module_; // the opened DLL handle
bool initialized_; // is the plugin initialized
// DLL exports, looked up by name.
CP_VersionNegotiateFunc CP_VersionNegotiate_;
CP_InitializeFunc CP_Initialize_;
// Additional function pointers provided by the plugin.
CPPluginFuncs plugin_funcs_;
// Used for unit tests.
typedef int (STDCALL *CP_TestFunc)(void*);
CP_TestFunc CP_Test_;
DISALLOW_EVIL_CONSTRUCTORS(ChromePluginLib);
};
#endif // CHROME_COMMON_CHROME_PLUGIN_LIB_H__
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