chromium/base/memory/ref_counted_delete_on_sequence.h

// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_
#define BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_

#include <utility>

#include "base/check.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/task/sequenced_task_runner.h"

namespace base {

// RefCountedDeleteOnSequence is similar to RefCountedThreadSafe, and ensures
// that the object will be deleted on a specified sequence.
//
// Sample usage:
// class Foo : public RefCountedDeleteOnSequence<Foo> {
//
//   Foo(scoped_refptr<SequencedTaskRunner> task_runner)
//       : RefCountedDeleteOnSequence<Foo>(std::move(task_runner)) {}
//   ...
//  private:
//   friend class RefCountedDeleteOnSequence<Foo>;
//   friend class DeleteHelper<Foo>;
//
//   ~Foo();
// };
template <class T>
class RefCountedDeleteOnSequence : public subtle::RefCountedThreadSafeBase { … };

}  // namespace base

#endif  // BASE_MEMORY_REF_COUNTED_DELETE_ON_SEQUENCE_H_