Program Listing for File StackAllocatedSequence.hpp
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// 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_STACKALLOCATEDSEQUENCE_HPP_
#define _FASTDDS_DDS_CORE_STACKALLOCATEDSEQUENCE_HPP_
#include <array>
#include <cassert>
#include <cstdint>
#include <stdexcept>
#include <fastdds/dds/core/LoanableArray.hpp>
#include <fastdds/dds/core/LoanableTypedCollection.hpp>
namespace eprosima {
namespace fastdds {
namespace dds {
template<typename T, LoanableCollection::size_type num_items>
struct StackAllocatedSequence : public LoanableTypedCollection<T>
{
using size_type = LoanableCollection::size_type;
using element_type = LoanableCollection::element_type;
StackAllocatedSequence()
{
has_ownership_ = true;
maximum_ = num_items;
length_ = 0;
elements_ = data_.buffer_for_loans();
}
~StackAllocatedSequence() = default;
// Non-copyable
StackAllocatedSequence(
const StackAllocatedSequence&) = delete;
StackAllocatedSequence& operator = (
const StackAllocatedSequence&) = delete;
// Non-moveable
StackAllocatedSequence(
StackAllocatedSequence&&) = delete;
StackAllocatedSequence& operator = (
StackAllocatedSequence&&) = delete;
protected:
using LoanableCollection::maximum_;
using LoanableCollection::length_;
using LoanableCollection::elements_;
using LoanableCollection::has_ownership_;
void resize(
LoanableCollection::size_type new_length) override
{
// This kind of collection cannot grow above its stack-allocated size
if (new_length > num_items)
{
throw std::bad_alloc();
}
}
private:
LoanableArray<T, num_items> data_;
};
} // namespace dds
} // namespace fastdds
} // namespace eprosima
#endif // _FASTDDS_DDS_CORE_STACKALLOCATEDSEQUENCE_HPP_