wsa_guard.hpp

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// SPDX-License-Identifier: MIT
#pragma once
#ifndef TIME_SHIELD_HEADER_NTP_DETAIL_WSA_GUARD_HPP_INCLUDED
#define TIME_SHIELD_HEADER_NTP_DETAIL_WSA_GUARD_HPP_INCLUDED
 
 
#if TIME_SHIELD_HAS_WINSOCK
#   ifndef WIN32_LEAN_AND_MEAN
#       define WIN32_LEAN_AND_MEAN
#   endif
#   ifndef NOMINMAX
#       define NOMINMAX
#   endif
#   include <winsock2.h>  // Must be included before windows.h
#   include <ws2tcpip.h>
#   include <windows.h>   // Optional, but safe if later needed
#else
#   error "WsaGuard requires WinSock support"
#endif
#include <mutex>
#include <string>
 
namespace time_shield {
 
    class WsaGuard {
    public:
        static const WsaGuard& instance() {
            static WsaGuard instance;
            return instance;
        }
 
        bool success() const noexcept {
            return m_ret_code == 0;
        }
 
        int ret_code() const noexcept {
            return m_ret_code;
        }
 
        const WSADATA& data() const noexcept {
            return m_wsa_data;
        }
 
    private:
        WsaGuard() {
            m_ret_code = WSAStartup(MAKEWORD(2, 2), &m_wsa_data);
        }
 
        ~WsaGuard() = default;
 
        WsaGuard(const WsaGuard&) = delete;
        WsaGuard& operator=(const WsaGuard&) = delete;
 
        WSADATA m_wsa_data{};
        int     m_ret_code = -1;
    };
 
} // namespace time_shield
 
#endif // TIME_SHIELD_HEADER_NTP_DETAIL_WSA_GUARD_HPP_INCLUDED