LoanableArray.hpp

// Copyright 2020 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// 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.

 
#ifndef FASTDDS_DDS_CORE__LOANABLEARRAY_HPP
#define FASTDDS_DDS_CORE__LOANABLEARRAY_HPP
 
#include <cstdint>
#include <array>
 
namespace eprosima {
namespace fastdds {
namespace dds {

template<typename T, std::size_t num_items>
struct LoanableArray : public std::array<T, num_items>
{
    LoanableArray()
    {
        for (std::size_t n = 0; n < num_items; ++n)
        {
            buffer_[n] = &((*this)[n]);
        }
    }
 
    // Non-copyable
    LoanableArray(
            const LoanableArray&) = delete;
    LoanableArray& operator = (
            const LoanableArray&) = delete;
 
    // Non-moveable
    LoanableArray(
            LoanableArray&&) = delete;
    LoanableArray& operator = (
            LoanableArray&&) = delete;

    void** buffer_for_loans() const
    {
        return (void**) buffer_;
    }
 
private:
 
    void* buffer_[num_items];
};
 
} // namespace dds
} // namespace fastdds
} // namespace eprosima
 
#endif // FASTDDS_DDS_CORE__LOANABLEARRAY_HPP