poor_mans_heap.hpp🔗

Namespaces🔗

Name
iox building block to easily create free function for logging in a library context
iox::cxx

Classes🔗

	Name
class	iox::cxx::PoorMansHeapType This is a proxy which must be used for the non default PoorMansHeap ctor.
class	iox::cxx::PoorMansHeap Reserves space on stack for placement new instatiation.

Source code🔗

// Copyright (c) 2019 by Robert Bosch GmbH. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// 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.
//
// SPDX-License-Identifier: Apache-2.0
#ifndef IOX_UTILS_CXX_POOR_MANS_HEAP_HPP
#define IOX_UTILS_CXX_POOR_MANS_HEAP_HPP

#include <cstddef>
#include <cstdint>
#include <utility>

namespace iox
{
namespace cxx
{
template <typename Type>
class PoorMansHeapType
{
};

template <typename Interface, size_t TypeSize, size_t TypeAlignment = 8>
class PoorMansHeap
{
  public:
    PoorMansHeap() = default;
    ~PoorMansHeap() noexcept;

    template <typename Type, typename... CTorArgs>
    PoorMansHeap(PoorMansHeapType<Type>, CTorArgs&&... ctorArgs) noexcept;

    PoorMansHeap(PoorMansHeap&& other) = delete;
    PoorMansHeap& operator=(PoorMansHeap&& rhs) = delete;

    PoorMansHeap(const PoorMansHeap&) = delete;
    PoorMansHeap& operator=(const PoorMansHeap&) = delete;

    template <typename Type, typename... CTorArgs>
    void newInstance(CTorArgs&&... ctorArgs) noexcept;

    void deleteInstance() noexcept;

    bool hasInstance() const noexcept;

    Interface* operator->() const noexcept;

    Interface& operator*() const noexcept;

  private:
    Interface* m_instance{nullptr};
    alignas(TypeAlignment) uint8_t m_heap[TypeSize];
};

} // namespace cxx
} // namespace iox

#include "iceoryx_utils/internal/cxx/poor_mans_heap.inl"

#endif // IOX_UTILS_CXX_POOR_MANS_HEAP_HPP

Updated on 31 May 2022 at 15:29:15 CEST