c++ - Sleep Less Than One Millisecond - Stack Overflow

c++ - Sleep Less Than One Millisecond - Stack Overflow:
Actually using this usleep function will cause a big memory/resource leak. (depending how often called)
use this corrected version

int usleep(long usec)
{
    struct timeval tv;
    fd_set dummy;
    SOCKET s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    FD_ZERO(&dummy);
    FD_SET(s, &dummy);
    tv.tv_sec = usec/1000000L;
    tv.tv_usec = usec%1000000L;

    bool sucess = 0 == select(0, 0, 0, &dummy, &tv);
    closesocket(dummy);

    return sucess;
}

On windows however, the use of select forces you to include the winsock library which has to be initialized like this in your application:
WORD wVersionRequested = MAKEWORD(1,0);
WSADATA wsaData;
WSAStartup(wVersionRequested, &wsaData);
And then the select won't allow you to be called without any socket so you have to do a little more to create a microsleep method:
int usleep(long usec)
{
    struct timeval tv;
    fd_set dummy;
    SOCKET s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
    FD_ZERO(&dummy);
    FD_SET(s, &dummy);
    tv.tv_sec = usec/1000000L;
    tv.tv_usec = usec%1000000L;
    return select(0, 0, 0, &dummy, &tv);
}
All these created usleep methods return zero when successful and non-zero for errors.