利用select函数的定时返回功能在Windows上实现微秒级的cpu休眠

void uSleep(uint32_t usec)
{
struct timeval timeout;
fd_set fds;
FD_ZERO(&fds);
int32_t fd = socket(AF_INET, SOCK_DGRAM, );
FD_SET(fd, &fds);
timeout.tv_sec = usec / ;
timeout.tv_usec = usec % ;
int ret = select(, NULL, NULL, &fds, &timeout);
if ( > ret)
{
perror("select");
}
closesocket(fd);
}