port_factory_reader.hpp

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// Copyright (c) 2025 Contributors to the Eclipse Foundation
//
// See the NOTICE file(s) distributed with this work for additional
// information regarding copyright ownership.
//
// This program and the accompanying materials are made available under the
// terms of the Apache Software License 2.0 which is available at
// https://www.apache.org/licenses/LICENSE-2.0, or the MIT license
// which is available at https://opensource.org/licenses/MIT.
//
// SPDX-License-Identifier: Apache-2.0 OR MIT
 
#ifndef IOX2_PORTFACTORY_READER_HPP
#define IOX2_PORTFACTORY_READER_HPP
 
#include "iox2/bb/expected.hpp"
#include "iox2/reader.hpp"
#include "iox2/reader_error.hpp"
#include "iox2/service_type.hpp"
 
namespace iox2 {
template <ServiceType S, typename KeyType>
class PortFactoryReader {
  public:
    PortFactoryReader(PortFactoryReader&&) noexcept = default;
    auto operator=(PortFactoryReader&&) noexcept -> PortFactoryReader& = default;
    ~PortFactoryReader() = default;
 
    PortFactoryReader(const PortFactoryReader&) = delete;
    auto operator=(const PortFactoryReader&) -> PortFactoryReader& = delete;
 
    auto create() && -> bb::Expected<Reader<S, KeyType>, ReaderCreateError>;
 
  private:
    template <ServiceType, typename>
    friend class PortFactoryBlackboard;
 
    explicit PortFactoryReader(iox2_port_factory_reader_builder_h handle);
 
    iox2_port_factory_reader_builder_h m_handle = nullptr;
};
 
template <ServiceType S, typename KeyType>
inline PortFactoryReader<S, KeyType>::PortFactoryReader(iox2_port_factory_reader_builder_h handle)
    : m_handle { handle } {
}
 
template <ServiceType S, typename KeyType>
inline auto PortFactoryReader<S, KeyType>::create() && -> bb::Expected<Reader<S, KeyType>, ReaderCreateError> {
    iox2_reader_h reader_handle {};
    auto result = iox2_port_factory_reader_builder_create(m_handle, nullptr, &reader_handle);
 
    if (result == IOX2_OK) {
        return Reader<S, KeyType>(reader_handle);
    }
 
    return bb::err(bb::into<ReaderCreateError>(result));
}
} // namespace iox2
 
#endif