WSAPoll名爲FD ::需要建議如何改寫

Question

了我在我移植到Windows（WinSocks 2.2）一些POSIXC代碼和我在與MS執行情況（不僅）poll()問題。

我有POSIX sockets一些經驗，但我很新的WinSock2，我還沒有發現在MSDN上任何有用的線索，所以我在這裏問：「如何使相當於行爲此示例代碼上視窗？」

static int connect_to_addr(char *address, char *port) 
{ 
    struct addrinfo hints; 
    struct addrinfo *addr; 
    int fd; 
    memset(&hints, 0, sizeof(hints)); 
    hints.ai_family = PF_UNSPEC; 
    hints.ai_socktype = SOCK_STREAM; 
    hints.ai_flags = AI_NUMERICHOST; 

    if (getaddrinfo(address, port, &hints, &addr) != 0) return -1; 

    fd = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); 
    if (fd < 0) return -1; 

    if (connect(fd, addr->ai_addr, addr->ai_addrlen) < 0) return -1; 

    freeaddrinfo(addr); 
    return fd; 
} 

功能connect_to_addr()只是爲了演示看起來第二場什麼fd等。

WSAStartup(...) 
... 
pollfd cinfd[2]; 
fds[0].fd = _fileno(stdin); //THIS is probably not supported on win32 
fds[0].events = POLLIN; 
fds[1].fd = f_connect(some_addr, some_port); //OK 
fds[1].events = POLLIN; 

while (1) { 
    res = WSAPoll(fds, 2, -1); //returns 1 

    if (fds[0].revents & (POLLIN | POLLHUP)) { //fds[0].revents == POLLNVAL !! problem 
     char buf[1024]; 
     int n, w, i; 
     n = read(fds[0].fd, buf, 1024); 
     ... 
    } 

    if (fds[1].revents & POLLIN) { 
     char buf[1024]; 
     int n, w, i; 
     n = recv(fds[1].fd, buf, 1024, 0); 
     ... 
    } 
} 

如何在WinSocks下實現這個常用的習語？感謝您的建議。

更好的是，自Vista以來WSAPoll（）在ws2_32.dll中;如何使它在XP下工作？

Answer 1

您最好使用WaitForMultipleObjects（）來等待stdin/sock。

HANDLE h[2]; 
h[0] = GetStdHandle(STD_INPUT_HANDLE); 
h[1] = sock; 

while (1) { 
    DWORD ret; 
    ret = WaitForMultipleObjects(2, h, FALSE, 0 /* wait value you want */); 

    if (ret == WAIT_OBJECT_0) { 
     // munipulating stdin. 
    } 
    if (ret == WAIT_OBJECT_0 + 1) { 
     // munipulating sock. 
     // then call recv. 
    } 
}