The Backyard - readline for win32 Diff

static int readline_getc(FILE *);
static int
readline_getc(FILE *input)
{
     rb_io_t *ifp = 0;
     VALUE c;
     if (!readline_instream) return rl_getc(input);
     GetOpenFile(readline_instream, ifp);
     if (rl_instream != ifp->stdio_file) return rl_getc(input);
#if !defined(_WIN32)
     c = rb_funcall(readline_instream, id_getbyte, 0, 0);
     if (NIL_P(c)) return EOF;
     return NUM2CHR(c);
#else
     {
         INPUT_RECORD ir;
         int n;
         static int prior_key = '0';
         for (;;) {
             if (prior_key > 0xff) {
                 prior_key = rl_getc(ifp->stdio_file);
                 return prior_key;
            }
            if (PeekConsoleInput((HANDLE)_get_osfhandle(ifp->fd), &ir, 1, &n)
                 && n == 1) {
                 if (ir.EventType == KEY_EVENT && ir.Event.KeyEvent.bKeyDown) {
                     return prior_key = rl_getc(ifp->stdio_file);
                     return prior_key;
                 } else {
                     ReadConsoleInput((HANDLE)_get_osfhandle(ifp->fd), &ir, 1, &n);
                 }
             } else {
                 HANDLE h = (HANDLE)_get_osfhandle(ifp->fd);
                 rb_w32_wait_events(&h, 1, 10);
             }
         }
     }
#endif
}

これはダメ。readline.dll内でペンディングしているやつがあっても待ち状態になってしまう。