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1 // Copyright (c) 2011 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 CONTENT_COMMON_PROCESS_WATCHER_H_ | |
6 #define CONTENT_COMMON_PROCESS_WATCHER_H_ | |
7 #pragma once | |
8 | |
9 #include "build/build_config.h" | |
10 | |
11 #include "base/basictypes.h" | |
12 #include "base/process.h" | |
13 #include "content/common/content_export.h" | |
14 | |
15 class CONTENT_EXPORT ProcessWatcher { | |
16 public: | |
17 // This method ensures that the specified process eventually terminates, and | |
18 // then it closes the given process handle. | |
19 // | |
20 // It assumes that the process has already been signalled to exit, and it | |
21 // begins by waiting a small amount of time for it to exit. If the process | |
22 // does not appear to have exited, then this function starts to become | |
23 // aggressive about ensuring that the process terminates. | |
24 // | |
25 // On Linux this method does not block the calling thread. | |
26 // On OS X this method may block for up to 2 seconds. | |
27 // | |
28 // NOTE: The process handle must have been opened with the PROCESS_TERMINATE | |
29 // and SYNCHRONIZE permissions. | |
30 // | |
31 static void EnsureProcessTerminated(base::ProcessHandle process_handle); | |
32 | |
33 #if defined(OS_POSIX) && !defined(OS_MACOSX) | |
34 // The nicer version of EnsureProcessTerminated() that is patient and will | |
35 // wait for |process_handle| to finish and then reap it. | |
36 static void EnsureProcessGetsReaped(base::ProcessHandle process_handle); | |
37 #endif | |
38 | |
39 private: | |
40 // Do not instantiate this class. | |
41 ProcessWatcher(); | |
42 | |
43 DISALLOW_COPY_AND_ASSIGN(ProcessWatcher); | |
44 }; | |
45 | |
46 #endif // CONTENT_COMMON_PROCESS_WATCHER_H_ | |
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