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89 lines
2.8 KiB
89 lines
2.8 KiB
// Copyright 2017 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// -----------------------------------------------------------------------------
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// File: memory.h
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// -----------------------------------------------------------------------------
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//
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// This header file contains utility functions for managing the creation and
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// conversion of smart pointers. This file is an extension to the C++
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// standard <memory> library header file.
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#ifndef CERES_PUBLIC_INTERNAL_MEMORY_H_
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#define CERES_PUBLIC_INTERNAL_MEMORY_H_
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#include <memory>
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#ifdef CERES_HAVE_EXCEPTIONS
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#define CERES_INTERNAL_TRY try
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#define CERES_INTERNAL_CATCH_ANY catch (...)
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#define CERES_INTERNAL_RETHROW \
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do { \
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throw; \
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} while (false)
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#else // CERES_HAVE_EXCEPTIONS
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#define CERES_INTERNAL_TRY if (true)
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#define CERES_INTERNAL_CATCH_ANY else if (false)
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#define CERES_INTERNAL_RETHROW \
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do { \
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} while (false)
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#endif // CERES_HAVE_EXCEPTIONS
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namespace ceres::internal {
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template <typename Allocator, typename Iterator, typename... Args>
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void ConstructRange(Allocator& alloc,
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Iterator first,
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Iterator last,
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const Args&... args) {
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for (Iterator cur = first; cur != last; ++cur) {
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CERES_INTERNAL_TRY {
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std::allocator_traits<Allocator>::construct(
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alloc, std::addressof(*cur), args...);
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}
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CERES_INTERNAL_CATCH_ANY {
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while (cur != first) {
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--cur;
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std::allocator_traits<Allocator>::destroy(alloc, std::addressof(*cur));
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}
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CERES_INTERNAL_RETHROW;
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}
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}
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}
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template <typename Allocator, typename Iterator, typename InputIterator>
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void CopyRange(Allocator& alloc,
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Iterator destination,
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InputIterator first,
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InputIterator last) {
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for (Iterator cur = destination; first != last;
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static_cast<void>(++cur), static_cast<void>(++first)) {
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CERES_INTERNAL_TRY {
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std::allocator_traits<Allocator>::construct(
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alloc, std::addressof(*cur), *first);
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}
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CERES_INTERNAL_CATCH_ANY {
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while (cur != destination) {
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--cur;
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std::allocator_traits<Allocator>::destroy(alloc, std::addressof(*cur));
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}
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CERES_INTERNAL_RETHROW;
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}
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}
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}
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} // namespace ceres::internal
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#endif // CERES_PUBLIC_INTERNAL_MEMORY_H_
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