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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_THREADING_THREAD_CHECKER_IMPL_H_
#define BASE_THREADING_THREAD_CHECKER_IMPL_H_
#include "base/base_export.h"
#include "base/compiler_specific.h"
#include "base/synchronization/lock.h"
#include "base/threading/platform_thread.h"
namespace base {
// Real implementation of ThreadChecker, for use in debug mode, or
// for temporary use in release mode (e.g. to CHECK on a threading issue
// seen only in the wild).
//
// Note: You should almost always use the ThreadChecker class to get the
// right version for your build configuration.
class BASE_EXPORT ThreadCheckerImpl {
public:
ThreadCheckerImpl();
~ThreadCheckerImpl();
bool CalledOnValidThread() const WARN_UNUSED_RESULT;
// Changes the thread that is checked for in CalledOnValidThread. This may
// be useful when an object may be created on one thread and then used
// exclusively on another thread.
void DetachFromThread();
private:
void EnsureThreadIdAssigned() const;
mutable base::Lock lock_;
// This is mutable so that CalledOnValidThread can set it.
// It's guarded by |lock_|.
mutable PlatformThreadRef valid_thread_id_;
};
} // namespace base
#endif // BASE_THREADING_THREAD_CHECKER_IMPL_H_
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