// Copyright (c) 2022 by István Váradi

// This file is part of VSCPL, a simple cross-platform utility library

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:

// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.

#pragma once

//------------------------------------------------------------------------------

#include "Overlappable.h"
#include "SocketMixin.h"
#include "SocketEventFactory.h"
#include "Event.h"

#include <cstdio>

//------------------------------------------------------------------------------

namespace hu { namespace varadiistvan { namespace scpl { namespace io {

//------------------------------------------------------------------------------

class Overlapped;

//------------------------------------------------------------------------------

/**
 * A server socket that provides a TCP access point. This is here only to allow
 * for a more efficient implementation of TCPAcceptor.
 */
class TCPServerSocketBase : public SocketMixin<Overlappable>
{
public:
    /**
     * Construct the server socket to listen at the given port.
     *
     * @param port the number of the port to listen at
     * @param waiter the waiter to use for waiting a possible event
     * occuring on the socket. If given, the socket will be
     * non-blocking. Otherwise, it will be blocking, and the accept()
     * function of the Acceptor might block.
     */
    TCPServerSocketBase(Waiter* waiter, HANDLE handle = 0);

    /**
     * Accept an incoming connection if possible.
     */
    HANDLE accept();
};

//------------------------------------------------------------------------------
// Inline definitions
//------------------------------------------------------------------------------

inline TCPServerSocketBase::TCPServerSocketBase(Waiter* waiter,
                                                HANDLE handle) :
    SocketMixin<Overlappable>(std::make_unique<SocketEventFactory>(),
                              waiter, handle)
{
}

//------------------------------------------------------------------------------

inline HANDLE TCPServerSocketBase::accept()
{
    auto a = WSAInterface::get().accept(handle);
    if (WSAInterface::get().isInvalidSocket(a)) {
        auto lastError = GetLastError();
        if (lastError!=WSAEWOULDBLOCK && lastError!=WSAEINPROGRESS) {
            setErrorCode(lastError);
        }
    }

    return a;
}

//------------------------------------------------------------------------------

} /* namespace hu::varadiistvan::scpl::io */ } /* namespace hu::varadiistvan::scpl */ } /* namespace hu::varadiistvan */ } /* namespace hu */

//------------------------------------------------------------------------------

// Local Variables:
// mode: C++
// c-basic-offset: 4
// indent-tabs-mode: nil
// End: