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comparison: ipc/chromium/src/base/process.h
ipc/chromium/src/base/process.h
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| 1 // Copyright (c) 2006-2008 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_PROCESS_H_ | |
| 6 #define BASE_PROCESS_H_ | |
| 7 | |
| 8 #include "base/basictypes.h" | |
| 9 | |
| 10 #include <sys/types.h> | |
| 11 #ifdef OS_WIN | |
| 12 #include <windows.h> | |
| 13 #endif | |
| 14 | |
| 15 namespace base { | |
| 16 | |
| 17 // ProcessHandle is a platform specific type which represents the underlying OS | |
| 18 // handle to a process. | |
| 19 // ProcessId is a number which identifies the process in the OS. | |
| 20 #if defined(OS_WIN) | |
| 21 typedef HANDLE ProcessHandle; | |
| 22 typedef DWORD ProcessId; | |
| 23 #elif defined(OS_POSIX) | |
| 24 // On POSIX, our ProcessHandle will just be the PID. | |
| 25 typedef pid_t ProcessHandle; | |
| 26 typedef pid_t ProcessId; | |
| 27 #endif | |
| 28 | |
| 29 class Process { | |
| 30 public: | |
| 31 Process() : process_(0), last_working_set_size_(0) {} | |
| 32 explicit Process(ProcessHandle handle) : | |
| 33 process_(handle), last_working_set_size_(0) {} | |
| 34 | |
| 35 // A handle to the current process. | |
| 36 static Process Current(); | |
| 37 | |
| 38 // Get/Set the handle for this process. The handle will be 0 if the process | |
| 39 // is no longer running. | |
| 40 ProcessHandle handle() const { return process_; } | |
| 41 void set_handle(ProcessHandle handle) { process_ = handle; } | |
| 42 | |
| 43 // Get the PID for this process. | |
| 44 ProcessId pid() const; | |
| 45 | |
| 46 // Is the this process the current process. | |
| 47 bool is_current() const; | |
| 48 | |
| 49 // Close the process handle. This will not terminate the process. | |
| 50 void Close(); | |
| 51 | |
| 52 // Terminates the process with extreme prejudice. The given result code will | |
| 53 // be the exit code of the process. If the process has already exited, this | |
| 54 // will do nothing. | |
| 55 void Terminate(int result_code); | |
| 56 | |
| 57 // A process is backgrounded when it's priority is lower than normal. | |
| 58 // Return true if this process is backgrounded, false otherwise. | |
| 59 bool IsProcessBackgrounded() const; | |
| 60 | |
| 61 // Set a prcess as backgrounded. If value is true, the priority | |
| 62 // of the process will be lowered. If value is false, the priority | |
| 63 // of the process will be made "normal" - equivalent to default | |
| 64 // process priority. | |
| 65 // Returns true if the priority was changed, false otherwise. | |
| 66 bool SetProcessBackgrounded(bool value); | |
| 67 | |
| 68 // Releases as much of the working set back to the OS as possible. | |
| 69 // Returns true if successful, false otherwise. | |
| 70 bool EmptyWorkingSet(); | |
| 71 | |
| 72 private: | |
| 73 ProcessHandle process_; | |
| 74 size_t last_working_set_size_; | |
| 75 }; | |
| 76 | |
| 77 } // namespace base | |
| 78 | |
| 79 #endif // BASE_PROCESS_H_ |
