+++ /dev/null
-/*
- * This file is open source software, licensed to you under the terms
- * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
- * distributed with this work for additional information regarding copyright
- * ownership. You may not use this file except in compliance with the License.
- *
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied. See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-/*
- * Copyright (C) 2014 Cloudius Systems, Ltd.
- */
-
-#ifndef CEPH_TRANSFER_H_
-#define CEPH_TRANSFER_H_
-
-// Helper functions for copying or moving multiple objects in an exception
-// safe manner, then destroying the sources.
-//
-// To transfer, call transfer_pass1(allocator, &from, &to) on all object pairs,
-// (this copies the object from @from to @to). If no exceptions are encountered,
-// call transfer_pass2(allocator, &from, &to). This destroys the object at the
-// origin. If exceptions were encountered, simply destroy all copied objects.
-//
-// As an optimization, if the objects are moveable without throwing (noexcept)
-// transfer_pass1() simply moves the objects and destroys the source, and
-// transfer_pass2() does nothing.
-
-#include <type_traits>
-#include <utility>
-
-template <typename T, typename Alloc>
-inline void transfer_pass1(Alloc& a, T* from, T* to,
- typename std::enable_if<std::is_nothrow_move_constructible<T>::value>::type* = nullptr) {
- a.construct(to, std::move(*from));
- a.destroy(from);
-}
-
-template <typename T, typename Alloc>
-inline void transfer_pass2(Alloc& a, T* from, T* to,
- typename std::enable_if<std::is_nothrow_move_constructible<T>::value>::type* = nullptr) {
-}
-
-template <typename T, typename Alloc>
-inline void transfer_pass1(Alloc& a, T* from, T* to,
- typename std::enable_if<!std::is_nothrow_move_constructible<T>::value>::type* = nullptr) {
- a.construct(to, *from);
-}
-
-template <typename T, typename Alloc>
-inline void transfer_pass2(Alloc& a, T* from, T* to,
- typename std::enable_if<!std::is_nothrow_move_constructible<T>::value>::type* = nullptr) {
- a.destroy(from);
-}
-
-#endif /* CEPH_TRANSFER_H_ */