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 3 // found in the LICENSE file. 4 5 #ifndef SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ 6 #define SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ 7 8 #include "base/basictypes.h" 9 #include "sandbox/sandbox_export.h" 10 11 namespace base { class Thread; } 12 13 namespace sandbox { 14 15 class SANDBOX_EXPORT ThreadHelpers { 16 public: 17 // Check whether the current process is single threaded. |proc_self_tasks| 18 // can be a file descriptor to /proc/self/task/ and remains owned by the 19 // caller or -1. 20 // If |proc_self_tasks| is -1, this method will open /proc/self/task/ and 21 // crash if it cannot. 22 static bool IsSingleThreaded(int proc_self_task); 23 24 // Stop |thread| and ensure that it does not have an entry in 25 // /proc/self/task/ from the point of view of the current thread. This is 26 // the way to stop threads before calling IsSingleThreaded(). 27 static bool StopThreadAndWatchProcFS(int proc_self_tasks, 28 base::Thread* thread); 29 30 private: 31 DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadHelpers); 32 }; 33 34 } // namespace sandbox 35 36 #endif // SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_ 37