OLD | NEW |
1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ | 5 #ifndef SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ |
6 #define SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ | 6 #define SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "sandbox/sandbox_export.h" | 9 #include "sandbox/sandbox_export.h" |
10 | 10 |
11 namespace base { class Thread; } | 11 namespace base { class Thread; } |
12 | 12 |
13 namespace sandbox { | 13 namespace sandbox { |
14 | 14 |
15 class SANDBOX_EXPORT ThreadHelpers { | 15 class SANDBOX_EXPORT ThreadHelpers { |
16 public: | 16 public: |
17 // Check whether the current process is single threaded. |proc_self_tasks| | 17 // Check whether the current process is single threaded. |proc_fd| |
18 // must be a file descriptor to /proc/self/task/ and remains owned by the | 18 // must be a file descriptor to /proc/ and remains owned by the |
19 // caller. | 19 // caller. |
20 static bool IsSingleThreaded(int proc_self_task); | 20 static bool IsSingleThreaded(int proc_fd); |
21 static bool IsSingleThreaded(); | 21 static bool IsSingleThreaded(); |
22 | 22 |
23 // Crash if the current process is not single threaded. This will wait | 23 // Crash if the current process is not single threaded. This will wait |
24 // on /proc to be updated. In the case where this doesn't crash, this will | 24 // on /proc to be updated. In the case where this doesn't crash, this will |
25 // return promptly. In the case where this does crash, this will first wait | 25 // return promptly. In the case where this does crash, this will first wait |
26 // for a few ms in Debug mode, a few seconds in Release mode. | 26 // for a few ms in Debug mode, a few seconds in Release mode. |
27 static void AssertSingleThreaded(int proc_self_task); | 27 static void AssertSingleThreaded(int proc_fd); |
28 static void AssertSingleThreaded(); | 28 static void AssertSingleThreaded(); |
29 | 29 |
30 // Stop |thread| and ensure that it does not have an entry in | 30 // Stop |thread| and ensure that it does not have an entry in |
31 // /proc/self/task/ from the point of view of the current thread. This is | 31 // /proc/self/task/ from the point of view of the current thread. This is |
32 // the way to stop threads before calling IsSingleThreaded(). | 32 // the way to stop threads before calling IsSingleThreaded(). |
33 static bool StopThreadAndWatchProcFS(int proc_self_task, | 33 static bool StopThreadAndWatchProcFS(int proc_fd, base::Thread* thread); |
34 base::Thread* thread); | |
35 | 34 |
36 static const char* GetAssertSingleThreadedErrorMessageForTests(); | 35 static const char* GetAssertSingleThreadedErrorMessageForTests(); |
37 | 36 |
38 private: | 37 private: |
39 DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadHelpers); | 38 DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadHelpers); |
40 }; | 39 }; |
41 | 40 |
42 } // namespace sandbox | 41 } // namespace sandbox |
43 | 42 |
44 #endif // SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ | 43 #endif // SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ |
OLD | NEW |