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