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//
 
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// Copyright (c) 2026 Michael Vandeberg
 
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//
 
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
 
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
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//
 
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// Official repository: https://github.com/cppalliance/corosio
 
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//
 
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#ifndef BOOST_COROSIO_DETAIL_LOCAL_STREAM_SERVICE_HPP
 
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#define BOOST_COROSIO_DETAIL_LOCAL_STREAM_SERVICE_HPP
 
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#include <boost/corosio/detail/config.hpp>
 
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#include <boost/corosio/local_stream_socket.hpp>
 
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#include <boost/capy/ex/execution_context.hpp>
 
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#include <system_error>
 
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namespace boost::corosio::detail {
 
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/* Abstract local stream service base class.
 
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   Concrete implementations (epoll, select, kqueue) inherit from
 
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   this class and provide platform-specific stream socket operations
 
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   for Unix domain sockets. The context constructor installs
 
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   whichever backend via make_service, and local_stream_socket.cpp
 
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   retrieves it via use_service<local_stream_service>().
 
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*/
 
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class BOOST_COROSIO_DECL local_stream_service
 
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    : public capy::execution_context::service
 
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    , public io_object::io_service
 
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{
 
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public:
 
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    /// Identifies this service for execution_context lookup.
 
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    using key_type = local_stream_service;
 
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    /** Open a local (Unix domain) stream socket.
 
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        Creates a socket and associates it with the platform
 
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        I/O backend (reactor or IOCP).
 
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        @param impl The socket implementation to open.
 
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        @param family Address family for local IPC.
 
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        @param type Socket type for stream sockets.
 
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        @param protocol Protocol number (typically 0).
 
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        @return Error code on failure, empty on success.
 
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    */
 
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    virtual std::error_code open_socket(
 
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        local_stream_socket::implementation& impl,
 
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        int family,
 
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        int type,
 
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        int protocol) = 0;
 
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    /** Assign an existing native socket handle to a socket.
 
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        Adopts a pre-created socket handle (e.g. from a
 
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        platform-specific pair creation API). On success the
 
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        impl takes ownership and will close the handle. On
 
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        failure the caller retains ownership and must close
 
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        it. On platforms that do not support handle adoption,
 
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        returns @c operation_not_supported.
 
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        @param impl The socket implementation to assign to.
 
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        @param fd The native socket handle to adopt.
 
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        @return Error code on failure, empty on success.
 
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    */
 
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    virtual std::error_code assign_socket(
 
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        local_stream_socket::implementation& impl,
 
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        native_handle_type fd) = 0;
 
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protected:
 
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    local_stream_service() = default;
 
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    ~local_stream_service() override = default;
 
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};
 
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} // namespace boost::corosio::detail
 
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#endif // BOOST_COROSIO_DETAIL_LOCAL_STREAM_SERVICE_HPP