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Side by Side Diff: chrome/common/chrome_plugin_lib.h

Issue 6576020: Remove Gears from Chrome (Closed) Base URL: http://git.chromium.org/git/chromium.git@trunk
Patch Set: windows fixes Created 9 years, 9 months ago
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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef CHROME_COMMON_CHROME_PLUGIN_LIB_H_
6 #define CHROME_COMMON_CHROME_PLUGIN_LIB_H_
7 #pragma once
8
9 #include "base/basictypes.h"
10 #include "base/file_path.h"
11 #include "base/ref_counted.h"
12 #include "chrome/common/chrome_plugin_api.h"
13
14 class MessageLoop;
15
16 // A ChromePluginLib is a single Chrome Plugin Library.
17 // This class is used in the browser process (IO thread), and the plugin process
18 // (plugin thread). It should not be accessed on other threads, because it
19 // issues a NOTIFY_CHROME_PLUGIN_UNLOADED notification.
20 class ChromePluginLib : public base::RefCounted<ChromePluginLib> {
21 public:
22 static bool IsInitialized();
23 static ChromePluginLib* Create(const FilePath& filename,
24 const CPBrowserFuncs* bfuncs);
25 static ChromePluginLib* Find(const FilePath& filename);
26 static void Destroy(const FilePath& filename);
27 static bool IsPluginThread();
28 static MessageLoop* GetPluginThreadLoop();
29
30 static ChromePluginLib* FromCPID(CPID id) {
31 return reinterpret_cast<ChromePluginLib*>(id);
32 }
33
34 // Adds Chrome plugins to the NPAPI plugin list.
35 static void RegisterPluginsWithNPAPI();
36
37 // Loads all the plugins that are marked as "LoadOnStartup" in the
38 // registry. This should only be called in the browser process.
39 static void LoadChromePlugins(const CPBrowserFuncs* bfuncs);
40
41 // Unloads all the loaded plugins and cleans up the plugin map.
42 static void UnloadAllPlugins();
43
44 // Returns true if the plugin is currently loaded.
45 bool is_loaded() const { return initialized_; }
46
47 // Get the Plugin's function pointer table.
48 const CPPluginFuncs& functions() const;
49
50 CPID cpid() { return reinterpret_cast<CPID>(this); }
51
52 const FilePath& filename() { return filename_; }
53
54 // Plugin API functions
55
56 // Method to call a test function in the plugin, used for unit tests.
57 int CP_Test(void* param);
58
59 #if defined(OS_WIN)
60 // The registry path to search for Chrome Plugins/
61 static const TCHAR kRegistryChromePlugins[];
62 #endif // defined(OS_WIN)
63
64 private:
65 friend class base::RefCounted<ChromePluginLib>;
66
67 explicit ChromePluginLib(const FilePath& filename);
68 ~ChromePluginLib();
69
70 // Method to initialize a Plugin.
71 // Initialize can be safely called multiple times.
72 bool CP_Initialize(const CPBrowserFuncs* bfuncs);
73
74 // Method to shutdown a Plugin.
75 void CP_Shutdown();
76
77 // Attempts to load the plugin.
78 // Returns true if it is a legitimate plugin, false otherwise
79 bool Load();
80
81 // Unloads the plugin.
82 void Unload();
83
84 FilePath filename_; // the path to the plugin
85 #if defined(OS_WIN)
86 // TODO(port): Remove ifdefs when we have portable replacement for HMODULE.
87 HMODULE module_; // the opened plugin handle
88 #endif // defined(OS_WIN)
89 bool initialized_; // is the plugin initialized
90
91 // Exported symbols from the plugin, looked up by name.
92 CP_VersionNegotiateFunc CP_VersionNegotiate_;
93 CP_InitializeFunc CP_Initialize_;
94
95 // Additional function pointers provided by the plugin.
96 CPPluginFuncs plugin_funcs_;
97
98 // Used for unit tests.
99 typedef int (STDCALL *CP_TestFunc)(void*);
100 CP_TestFunc CP_Test_;
101
102 DISALLOW_COPY_AND_ASSIGN(ChromePluginLib);
103 };
104
105 #endif // CHROME_COMMON_CHROME_PLUGIN_LIB_H_
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