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Diffstat (limited to 'ipc/chromium/src/base/process.h')
-rw-r--r-- | ipc/chromium/src/base/process.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/process.h b/ipc/chromium/src/base/process.h new file mode 100644 index 000000000..b562771e6 --- /dev/null +++ b/ipc/chromium/src/base/process.h @@ -0,0 +1,81 @@ +/* -*- 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_ |