1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/base/non_thread_safe.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,52 @@
1.4 +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#ifndef BASE_NON_THREAD_SAFE_H__
1.9 +#define BASE_NON_THREAD_SAFE_H__
1.10 +
1.11 +#include "base/platform_thread.h"
1.12 +
1.13 +// A helper class used to help verify that methods of a class are
1.14 +// called from the same thread. One can inherit from this class and use
1.15 +// CalledOnValidThread() to verify.
1.16 +//
1.17 +// This is intended to be used with classes that appear to be thread safe, but
1.18 +// aren't. For example, a service or a singleton like the preferences system.
1.19 +//
1.20 +// Example:
1.21 +// class MyClass : public NonThreadSafe {
1.22 +// public:
1.23 +// void Foo() {
1.24 +// DCHECK(CalledOnValidThread());
1.25 +// ... (do stuff) ...
1.26 +// }
1.27 +// }
1.28 +//
1.29 +// In Release mode, CalledOnValidThread will always return true.
1.30 +//
1.31 +#ifndef NDEBUG
1.32 +class NonThreadSafe {
1.33 + public:
1.34 + NonThreadSafe();
1.35 + ~NonThreadSafe();
1.36 +
1.37 + bool CalledOnValidThread() const;
1.38 +
1.39 + private:
1.40 + PlatformThreadId valid_thread_id_;
1.41 +};
1.42 +#else
1.43 +// Do nothing in release mode.
1.44 +class NonThreadSafe {
1.45 + public:
1.46 + NonThreadSafe() {}
1.47 + ~NonThreadSafe() {}
1.48 +
1.49 + bool CalledOnValidThread() const {
1.50 + return true;
1.51 + }
1.52 +};
1.53 +#endif // NDEBUG
1.54 +
1.55 +#endif // BASE_NON_THREAD_SAFE_H__
