mirror of
https://bitbucket.org/chromiumembedded/cef
synced 2025-06-05 21:39:12 +02:00
70ed95bcca
changes (see http://crrev.com/e649f573) and fix unit test runtime errors when building with GYP_DEFINES=dcheck_always_on=1.
127 lines
4.7 KiB
C++
127 lines
4.7 KiB
C++
// Copyright (c) 2014 Marshall A. Greenblatt. Portions copyright (c) 2012
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// Google Inc. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the name Chromium Embedded
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// Framework nor the names of its contributors may be used to endorse
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// or promote products derived from this software without specific prior
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// written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef CEF_INCLUDE_BASE_THREAD_CHECKER_H_
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#define CEF_INCLUDE_BASE_THREAD_CHECKER_H_
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#pragma once
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#if defined(BASE_THREADING_THREAD_CHECKER_H_)
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// Do nothing if the Chromium header has already been included.
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// This can happen in cases where Chromium code is used directly by the
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// client application. When using Chromium code directly always include
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// the Chromium header first to avoid type conflicts.
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#elif defined(BUILDING_CEF_SHARED)
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// When building CEF include the Chromium header directly.
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#include "base/threading/thread_checker.h"
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#else // !BUILDING_CEF_SHARED
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// The following is substantially similar to the Chromium implementation.
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// If the Chromium implementation diverges the below implementation should be
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// updated to match.
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#include "include/base/cef_logging.h"
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#include "include/base/internal/cef_thread_checker_impl.h"
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// Apart from debug builds, we also enable the thread checker in
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// builds with DCHECK_ALWAYS_ON so that trybots and waterfall bots
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// with this define will get the same level of thread checking as
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// debug bots.
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#if DCHECK_IS_ON()
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#define ENABLE_THREAD_CHECKER 1
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#else
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#define ENABLE_THREAD_CHECKER 0
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#endif
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namespace base {
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namespace cef_internal {
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// Do nothing implementation, for use in release mode.
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//
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// Note: You should almost always use the ThreadChecker class to get the
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// right version for your build configuration.
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class ThreadCheckerDoNothing {
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public:
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bool CalledOnValidThread() const {
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return true;
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}
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void DetachFromThread() {}
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};
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} // namespace cef_internal
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// ThreadChecker is a helper class used to help verify that some methods of a
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// class are called from the same thread. It provides identical functionality to
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// base::NonThreadSafe, but it is meant to be held as a member variable, rather
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// than inherited from base::NonThreadSafe.
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//
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// While inheriting from base::NonThreadSafe may give a clear indication about
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// the thread-safety of a class, it may also lead to violations of the style
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// guide with regard to multiple inheritance. The choice between having a
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// ThreadChecker member and inheriting from base::NonThreadSafe should be based
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// on whether:
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// - Derived classes need to know the thread they belong to, as opposed to
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// having that functionality fully encapsulated in the base class.
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// - Derived classes should be able to reassign the base class to another
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// thread, via DetachFromThread.
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//
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// If neither of these are true, then having a ThreadChecker member and calling
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// CalledOnValidThread is the preferable solution.
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//
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// Example:
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// class MyClass {
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// public:
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// void Foo() {
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// DCHECK(thread_checker_.CalledOnValidThread());
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// ... (do stuff) ...
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// }
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//
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// private:
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// ThreadChecker thread_checker_;
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// }
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//
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// In Release mode, CalledOnValidThread will always return true.
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#if ENABLE_THREAD_CHECKER
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class ThreadChecker : public cef_internal::ThreadCheckerImpl {
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};
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#else
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class ThreadChecker : public cef_internal::ThreadCheckerDoNothing {
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};
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#endif // ENABLE_THREAD_CHECKER
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#undef ENABLE_THREAD_CHECKER
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} // namespace base
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#endif // !BUILDING_CEF_SHARED
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#endif // CEF_INCLUDE_BASE_THREAD_CHECKER_H_
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