The Tor Browser: security/sandbox/chromium/base/threading/thread_checker

     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.

     5 #ifndef BASE_THREADING_THREAD_CHECKER_IMPL_H_

     6 #define BASE_THREADING_THREAD_CHECKER_IMPL_H_

     8 #include "base/base_export.h"

     9 #include "base/synchronization/lock.h"

    10 #include "base/threading/platform_thread.h"

    12 namespace base {

    14 // Real implementation of ThreadChecker, for use in debug mode, or

    15 // for temporary use in release mode (e.g. to CHECK on a threading issue

    16 // seen only in the wild).

    17 //

    18 // Note: You should almost always use the ThreadChecker class to get the

    19 // right version for your build configuration.

    20 class BASE_EXPORT ThreadCheckerImpl {

    21  public:

    22   ThreadCheckerImpl();

    23   ~ThreadCheckerImpl();

    25   bool CalledOnValidThread() const;

    27   // Changes the thread that is checked for in CalledOnValidThread.  This may

    28   // be useful when an object may be created on one thread and then used

    29   // exclusively on another thread.

    30   void DetachFromThread();

    32  private:

    33   void EnsureThreadIdAssigned() const;

    35   mutable base::Lock lock_;

    36   // This is mutable so that CalledOnValidThread can set it.

    37   // It's guarded by |lock_|.

    38   mutable PlatformThreadId valid_thread_id_;

    39 };

    41 }  // namespace base

    43 #endif  // BASE_THREADING_THREAD_CHECKER_IMPL_H_

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