47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_
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#define SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_
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#include "base/macros.h"
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#include "sandbox/sandbox_export.h"
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namespace base { class Thread; }
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namespace sandbox {
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class SANDBOX_EXPORT ThreadHelpers {
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public:
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// Checks whether the current process is single threaded. |proc_fd|
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// must be a file descriptor to /proc/ and remains owned by the
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// caller.
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static bool IsSingleThreaded(int proc_fd);
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static bool IsSingleThreaded();
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// Crashes if the current process is not single threaded. This will wait
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// on /proc to be updated. In the case where this doesn't crash, this will
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// return promptly. In the case where this does crash, this will first wait
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// for a few ms in Debug mode, a few seconds in Release mode.
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static void AssertSingleThreaded(int proc_fd);
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static void AssertSingleThreaded();
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// Starts |thread| and ensure that it has an entry in /proc/self/task/ from
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// the point of view of the current thread.
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static bool StartThreadAndWatchProcFS(int proc_fd, base::Thread* thread);
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// Stops |thread| and ensure that it does not have an entry in
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// /proc/self/task/ from the point of view of the current thread. This is
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// the way to stop threads before calling IsSingleThreaded().
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static bool StopThreadAndWatchProcFS(int proc_fd, base::Thread* thread);
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static const char* GetAssertSingleThreadedErrorMessageForTests();
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(ThreadHelpers);
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};
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} // namespace sandbox
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#endif // SANDBOX_LINUX_SERVICES_THREAD_HELPERS_H_
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