1 // Copyright (c) 2012 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 BASE_WIN_SCOPED_PROCESS_INFORMATION_H_ 6 #define BASE_WIN_SCOPED_PROCESS_INFORMATION_H_ 7 8 #include <windows.h> 9 10 #include "base/win/scoped_handle.h" 11 12 namespace base { 13 namespace win { 14 15 // Manages the closing of process and thread handles from PROCESS_INFORMATION 16 // structures. Allows clients to take ownership of either handle independently. 17 class ScopedProcessInformation { 18 public: 19 ScopedProcessInformation(); 20 explicit ScopedProcessInformation(const PROCESS_INFORMATION& process_info); 21 ~ScopedProcessInformation(); 22 23 // Returns true iff this instance is holding a thread and/or process handle. 24 bool IsValid() const; 25 26 // Closes the held thread and process handles, if any. 27 void Close(); 28 29 // Populates this instance with the provided |process_info|. 30 void Set(const PROCESS_INFORMATION& process_info); 31 32 // Populates this instance with duplicate handles and the thread/process IDs 33 // from |other|. Returns false in case of failure, in which case this instance 34 // will be completely unpopulated. 35 bool DuplicateFrom(const ScopedProcessInformation& other); 36 37 // Transfers ownership of the held PROCESS_INFORMATION, if any, away from this 38 // instance. 39 PROCESS_INFORMATION Take(); 40 41 // Transfers ownership of the held process handle, if any, away from this 42 // instance. Note that the related process_id will also be cleared. 43 HANDLE TakeProcessHandle(); 44 45 // Transfers ownership of the held thread handle, if any, away from this 46 // instance. Note that the related thread_id will also be cleared. 47 HANDLE TakeThreadHandle(); 48 49 // Returns the held process handle, if any, while retaining ownership. process_handle()50 HANDLE process_handle() const { return process_handle_.Get(); } 51 52 // Returns the held thread handle, if any, while retaining ownership. thread_handle()53 HANDLE thread_handle() const { return thread_handle_.Get(); } 54 55 // Returns the held process id, if any. process_id()56 DWORD process_id() const { return process_id_; } 57 58 // Returns the held thread id, if any. thread_id()59 DWORD thread_id() const { return thread_id_; } 60 61 private: 62 ScopedHandle process_handle_; 63 ScopedHandle thread_handle_; 64 DWORD process_id_; 65 DWORD thread_id_; 66 67 ScopedProcessInformation(const ScopedProcessInformation&) = delete; 68 ScopedProcessInformation& operator=(const ScopedProcessInformation&) = delete; 69 }; 70 71 } // namespace win 72 } // namespace base 73 74 #endif // BASE_WIN_SCOPED_PROCESS_INFORMATION_H_ 75