/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ // Copyright (c) 2006-2008 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_PROCESS_H_ #define BASE_PROCESS_H_ #include "base/basictypes.h" #include <sys/types.h> #ifdef OS_WIN #include <windows.h> #endif namespace base { // ProcessHandle is a platform specific type which represents the underlying OS // handle to a process. // ProcessId is a number which identifies the process in the OS. #if defined(OS_WIN) typedef HANDLE ProcessHandle; typedef DWORD ProcessId; #elif defined(OS_POSIX) // On POSIX, our ProcessHandle will just be the PID. typedef pid_t ProcessHandle; typedef pid_t ProcessId; #endif class Process { public: Process() : process_(0), last_working_set_size_(0) {} explicit Process(ProcessHandle aHandle) : process_(aHandle), last_working_set_size_(0) {} // A handle to the current process. static Process Current(); // Get/Set the handle for this process. The handle will be 0 if the process // is no longer running. ProcessHandle handle() const { return process_; } void set_handle(ProcessHandle aHandle) { process_ = aHandle; } // Get the PID for this process. ProcessId pid() const; // Is the this process the current process. bool is_current() const; // Close the process handle. This will not terminate the process. void Close(); // Terminates the process with extreme prejudice. The given result code will // be the exit code of the process. If the process has already exited, this // will do nothing. void Terminate(int result_code); // A process is backgrounded when it's priority is lower than normal. // Return true if this process is backgrounded, false otherwise. bool IsProcessBackgrounded() const; // Set a prcess as backgrounded. If value is true, the priority // of the process will be lowered. If value is false, the priority // of the process will be made "normal" - equivalent to default // process priority. // Returns true if the priority was changed, false otherwise. bool SetProcessBackgrounded(bool value); // Releases as much of the working set back to the OS as possible. // Returns true if successful, false otherwise. bool EmptyWorkingSet(); private: ProcessHandle process_; size_t last_working_set_size_; }; } // namespace base #endif // BASE_PROCESS_H_