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| 1 // Copyright 2009-2010 Google Inc. | |
| 2 // | |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 // you may not use this file except in compliance with the License. | |
| 5 // You may obtain a copy of the License at | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 9 // Unless required by applicable law or agreed to in writing, software | |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 // See the License for the specific language governing permissions and | |
| 13 // limitations under the License. | |
| 14 // ======================================================================== | |
| 15 // | |
| 16 // Contains GoogleUpdate class which is the ATL exe module for the local | |
| 17 // server that allows launching of the browser at medium integrity. | |
| 18 | |
| 19 #ifndef OMAHA_GOOPDATE_GOOGLE_UPDATE_H_ | |
| 20 #define OMAHA_GOOPDATE_GOOGLE_UPDATE_H_ | |
| 21 | |
| 22 #include <windows.h> | |
| 23 #include <atlbase.h> | |
| 24 #include "base/scoped_ptr.h" | |
| 25 #include "goopdate/omaha3_idl.h" | |
| 26 #include "omaha/base/debug.h" | |
| 27 | |
| 28 namespace omaha { | |
| 29 | |
| 30 // TODO(omaha): Perhaps a better approach might be to use Adapter classes to | |
| 31 // modify behavior instead of the mode being explicitly specified here. Consider | |
| 32 // when making future changes. | |
| 33 // It might also be a good idea to rename this class and file since it is more | |
| 34 // a boilerplate for COM servers than it is related to "Google Update" or the | |
| 35 // main Omaha 3 COM server since it als handles various brokers. | |
| 36 class GoogleUpdate : public CAtlExeModuleT<GoogleUpdate> { | |
| 37 public: | |
| 38 enum ComServerMode { | |
| 39 kUpdate3Mode, | |
| 40 kBrokerMode, | |
| 41 kOnDemandMode, | |
| 42 }; | |
| 43 | |
| 44 DECLARE_LIBID(LIBID_GoogleUpdate3Lib) | |
| 45 | |
| 46 explicit GoogleUpdate(bool is_machine, ComServerMode mode); | |
| 47 ~GoogleUpdate(); | |
| 48 HRESULT RegisterClassObjects(DWORD cls_ctx, DWORD flags) throw(); | |
| 49 HRESULT RevokeClassObjects() throw(); | |
| 50 | |
| 51 // The base ATL classes have an implicit dependency on the second parameter | |
| 52 // to RegisterServer and UnregisterServer having a default value. | |
| 53 HRESULT RegisterServer(BOOL register_tlb, const CLSID* id = NULL) throw(); | |
| 54 HRESULT UnregisterServer(BOOL unregister_tlb, const CLSID* id = NULL) throw(); | |
| 55 HRESULT PreMessageLoop(int show_cmd) throw(); | |
| 56 HRESULT PostMessageLoop() throw(); | |
| 57 HRESULT Main(); | |
| 58 | |
| 59 // This is cloned from CAtlExeModuleT.Lock(). The one difference is the call | |
| 60 // to ::CoAddRefServerProcess(). See the description for Unlock() below for | |
| 61 // further information. | |
| 62 virtual LONG Lock() throw() { | |
| 63 ::CoAddRefServerProcess(); | |
| 64 return CComGlobalsThreadModel::Increment(&m_nLockCnt); | |
| 65 } | |
| 66 | |
| 67 // This is cloned from CAtlExeModuleT.Unlock(). The big difference is the call | |
| 68 // to ::CoReleaseServerProcess(), to ensure that the class factories are | |
| 69 // suspended once the lock count drops to zero. This fixes a a race condition | |
| 70 // where an activation request could come in in the middle of shutting down. | |
| 71 // This shutdown mechanism works with free threaded servers. | |
| 72 // | |
| 73 // There are race issues with the ATL delayed shutdown mechanism, hence the | |
| 74 // associated code has been eliminated, and we have an assert to make sure | |
| 75 // m_bDelayShutdown is not set. | |
| 76 virtual LONG Unlock() throw() { | |
| 77 ASSERT1(!m_bDelayShutdown); | |
| 78 | |
| 79 ::CoReleaseServerProcess(); | |
| 80 LONG lRet = CComGlobalsThreadModel::Decrement(&m_nLockCnt); | |
| 81 | |
| 82 if (lRet == 0) { | |
| 83 ::PostThreadMessage(m_dwMainThreadID, WM_QUIT, 0, 0); | |
| 84 } | |
| 85 | |
| 86 return lRet; | |
| 87 } | |
| 88 | |
| 89 private: | |
| 90 _ATL_OBJMAP_ENTRY* GetObjectMap(); | |
| 91 HRESULT RegisterOrUnregisterExe(bool is_register); | |
| 92 static HRESULT RegisterOrUnregisterExe(void* data, bool is_register); | |
| 93 | |
| 94 ComServerMode mode_; | |
| 95 bool is_machine_; | |
| 96 | |
| 97 DISALLOW_EVIL_CONSTRUCTORS(GoogleUpdate); | |
| 98 }; | |
| 99 | |
| 100 } // namespace omaha | |
| 101 | |
| 102 #endif // OMAHA_GOOPDATE_GOOGLE_UPDATE_H_ | |
| 103 | |
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