PlatformSocket.hpp

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#pragma once
 
#ifdef _WIN32
    #ifndef WIN32_LEAN_AND_MEAN
    #define WIN32_LEAN_AND_MEAN
    #endif
    #include <windows.h>
    #include <winsock2.h>
    #include <ws2tcpip.h>
    #undef min
    #undef max
#else
    #include <sys/socket.h>
    #include <netinet/in.h>
    #include <netinet/tcp.h>
    #include <arpa/inet.h>
    #include <unistd.h>
    #include <fcntl.h>
    #include <cerrno>
    #include <netdb.h>
#endif
 
namespace network {
 
#ifdef _WIN32
    using socket_t = SOCKET;
    constexpr socket_t INVALID_SOCKET_FD = INVALID_SOCKET;
    constexpr int SOCKET_ERROR_VAL = SOCKET_ERROR;
    
    using socklen_t = int;
    using ssize_t = intptr_t;
    
    inline int get_last_socket_error() { return WSAGetLastError(); }
    inline bool is_would_block_error() { return WSAGetLastError() == WSAEWOULDBLOCK; }
#else
    using socket_t = int;
    constexpr socket_t INVALID_SOCKET_FD = -1;
    constexpr int SOCKET_ERROR_VAL = -1;
    
    using socklen_t = ::socklen_t;
    using ssize_t = ::ssize_t;
    
    inline int get_last_socket_error() { return errno; }
    inline bool is_would_block_error() { return errno == EWOULDBLOCK || errno == EAGAIN; }
#endif
 
    void initialize_platform_networking();
    void cleanup_platform_networking();
    void close_socket(socket_t fd);
    void set_non_blocking(socket_t fd);
}