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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_FRAME_MODULE_UTILS_H_ | 5 #ifndef CHROME_FRAME_MODULE_UTILS_H_ |
6 #define CHROME_FRAME_MODULE_UTILS_H_ | 6 #define CHROME_FRAME_MODULE_UTILS_H_ |
7 | 7 |
8 #include <ObjBase.h> | 8 #include <ObjBase.h> |
9 #include <windows.h> | 9 #include <windows.h> |
10 | 10 |
11 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
12 #include "base/scoped_ptr.h" | 12 #include "base/scoped_ptr.h" |
13 #include "base/shared_memory.h" | 13 #include "base/shared_memory.h" |
14 #include "base/singleton.h" | 14 #include "base/singleton.h" |
15 | 15 |
16 // Forward | 16 // Forward |
| 17 namespace ATL { |
| 18 class CSecurityAttributes; |
| 19 } |
17 class Version; | 20 class Version; |
18 | 21 |
19 // A singleton class that provides a facility to register the version of the | 22 // A singleton class that provides a facility to register the version of the |
20 // current module as the only version that should be loaded system-wide. If | 23 // current module as the only version that should be loaded system-wide. If |
21 // this module is not the first instance loaded in the system, then the version | 24 // this module is not the first instance loaded in the system, then the version |
22 // that loaded first will be delegated to. This makes a few assumptions: | 25 // that loaded first will be delegated to. This makes a few assumptions: |
23 // 1) That different versions of the module this code is in reside in | 26 // 1) That different versions of the module this code is in reside in |
24 // neighbouring versioned directories, e.g. | 27 // neighbouring versioned directories, e.g. |
25 // C:\foo\bar\1.2.3.4\my_module.dll | 28 // C:\foo\bar\1.2.3.4\my_module.dll |
26 // C:\foo\bar\1.2.3.5\my_module.dll | 29 // C:\foo\bar\1.2.3.5\my_module.dll |
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60 // Returns the version of the current module or NULL if none can be found. | 63 // Returns the version of the current module or NULL if none can be found. |
61 // The caller must free the Version. | 64 // The caller must free the Version. |
62 virtual Version* GetCurrentModuleVersion(); | 65 virtual Version* GetCurrentModuleVersion(); |
63 | 66 |
64 // Attempt to load the specified version dll. Finds it by walking up one | 67 // Attempt to load the specified version dll. Finds it by walking up one |
65 // directory from our current module's location, then appending the newly | 68 // directory from our current module's location, then appending the newly |
66 // found version number. The Version class in base will have ensured that we | 69 // found version number. The Version class in base will have ensured that we |
67 // actually have a valid version and not e.g. ..\..\..\..\MyEvilFolder\. | 70 // actually have a valid version and not e.g. ..\..\..\..\MyEvilFolder\. |
68 virtual HMODULE LoadVersionedModule(Version* version); | 71 virtual HMODULE LoadVersionedModule(Version* version); |
69 | 72 |
| 73 // Builds the necessary SECURITY_ATTRIBUTES to allow low integrity access |
| 74 // to an object. Returns true on success, false otherwise. |
| 75 virtual bool BuildSecurityAttributesForLock( |
| 76 ATL::CSecurityAttributes* sec_attr); |
| 77 |
| 78 // Attempts to change the permissions on the given file mapping to read only. |
| 79 // Returns true on success, false otherwise. |
| 80 virtual bool SetFileMappingToReadOnly(base::SharedMemoryHandle mapping); |
| 81 |
70 // Shared memory segment that contains the version beacon. | 82 // Shared memory segment that contains the version beacon. |
71 scoped_ptr<base::SharedMemory> shared_memory_; | 83 scoped_ptr<base::SharedMemory> shared_memory_; |
72 | 84 |
73 // The current version of the DLL to be loaded. | 85 // The current version of the DLL to be loaded. |
74 scoped_ptr<Version> dll_version_; | 86 scoped_ptr<Version> dll_version_; |
75 | 87 |
76 // The handle to the first version of this module that was loaded. This | 88 // The handle to the first version of this module that was loaded. This |
77 // may refer to the current module, or another version of the same module | 89 // may refer to the current module, or another version of the same module |
78 // that we go and load. | 90 // that we go and load. |
79 HMODULE first_module_handle_; | 91 HMODULE first_module_handle_; |
80 | 92 |
81 // Used for tests to override the name of the shared memory segment. | 93 // Used for tests to override the name of the shared memory segment. |
82 std::string shared_memory_name_; | 94 std::string shared_memory_name_; |
83 | 95 |
84 friend class ModuleUtilsTest; | 96 friend class ModuleUtilsTest; |
85 | 97 |
86 DISALLOW_COPY_AND_ASSIGN(DllRedirector); | 98 DISALLOW_COPY_AND_ASSIGN(DllRedirector); |
87 }; | 99 }; |
88 | 100 |
89 #endif // CHROME_FRAME_MODULE_UTILS_H_ | 101 #endif // CHROME_FRAME_MODULE_UTILS_H_ |
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