chromium/base/task/sequenced_task_runner_helpers.h

// Copyright 2012 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_TASK_SEQUENCED_TASK_RUNNER_HELPERS_H_
#define BASE_TASK_SEQUENCED_TASK_RUNNER_HELPERS_H_

#include <memory>

namespace base {

class SequencedTaskRunner;

// Template helpers which use function indirection to erase T from the
// function signature while still remembering it so we can call the
// correct destructor/release function.
//
// We use this trick so we don't need to include bind.h in a header
// file like sequenced_task_runner.h. We also wrap the helpers in a
// templated class to make it easier for users of DeleteSoon to
// declare the helper as a friend.
template <class T>
class DeleteHelper { … };

template <class T>
class DeleteUniquePtrHelper { … };

template <class T>
class ReleaseHelper { … };

}  // namespace base

#endif  // BASE_TASK_SEQUENCED_TASK_RUNNER_HELPERS_H_