// Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef BASE_WIN_SCOPED_PROCESS_INFORMATION_H_ #define BASE_WIN_SCOPED_PROCESS_INFORMATION_H_ #include #include "base/base_export.h" #include "base/win/scoped_handle.h" namespace base { namespace win { // Manages the closing of process and thread handles from PROCESS_INFORMATION // structures. Allows clients to take ownership of either handle independently. class BASE_EXPORT ScopedProcessInformation { public: ScopedProcessInformation(); explicit ScopedProcessInformation(const PROCESS_INFORMATION& process_info); ScopedProcessInformation(const ScopedProcessInformation&) = delete; ScopedProcessInformation& operator=(const ScopedProcessInformation&) = delete; ~ScopedProcessInformation(); // Returns true iff this instance is holding a thread and/or process handle. bool IsValid() const; // Closes the held thread and process handles, if any. void Close(); // Populates this instance with the provided |process_info|. void Set(const PROCESS_INFORMATION& process_info); // Populates this instance with duplicate handles and the thread/process IDs // from |other|. Returns false in case of failure, in which case this instance // will be completely unpopulated. bool DuplicateFrom(const ScopedProcessInformation& other); // Transfers ownership of the held PROCESS_INFORMATION, if any, away from this // instance. PROCESS_INFORMATION Take(); // Transfers ownership of the held process handle, if any, away from this // instance. Note that the related process_id will also be cleared. HANDLE TakeProcessHandle(); // Transfers ownership of the held thread handle, if any, away from this // instance. Note that the related thread_id will also be cleared. HANDLE TakeThreadHandle(); // Returns the held process handle, if any, while retaining ownership. HANDLE process_handle() const { return process_handle_.get(); } // Returns the held thread handle, if any, while retaining ownership. HANDLE thread_handle() const { return thread_handle_.get(); } // Returns the held process id, if any. DWORD process_id() const { return process_id_; } // Returns the held thread id, if any. DWORD thread_id() const { return thread_id_; } private: ScopedHandle process_handle_; ScopedHandle thread_handle_; DWORD process_id_ = 0; DWORD thread_id_ = 0; }; } // namespace win } // namespace base #endif // BASE_WIN_SCOPED_PROCESS_INFORMATION_H_