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      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 
     10 namespace base { class Thread; }
     11 
     12 namespace sandbox {
     13 
     14 class ThreadHelpers {
     15  public:
     16   // Check whether the current process is single threaded. |proc_self_tasks|
     17   // should be a file descriptor to /proc/self/task/ and remains owned by the
     18   // caller.
     19   static bool IsSingleThreaded(int proc_self_task);
     20 
     21   // Stop |thread| and ensure that it does not have an entry in
     22   // /proc/self/task/ from the point of view of the current thread. This is
     23   // the way to stop threads before calling IsSingleThreaded().
     24   static bool StopThreadAndWatchProcFS(int proc_self_tasks,
     25                                        base::Thread* thread);
     26 
     27  private:
     28   DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadHelpers);
     29 };
     30 
     31 }  // namespace content
     32 
     33 #endif  // SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_
     34