int
_poll(struct pollfd *fds, unsigned int nfds, int timeout)
{
struct pthread *curthread = _get_curthread();
struct timespec ts;
int numfds = nfds;
int i, ret = 0;
struct pthread_poll_data data;
if (numfds > _thread_dtablesize) {
numfds = _thread_dtablesize;
}
/* Check if a timeout was specified: */
if (timeout == INFTIM) {
/* Wait for ever: */
_thread_kern_set_timeout(NULL);
} else if (timeout > 0) {
/* Convert the timeout in msec to a timespec: */
ts.tv_sec = timeout / 1000;
ts.tv_nsec = (timeout % 1000) * 1000000;
/* Set the wake up time: */
_thread_kern_set_timeout(&ts);
} else if (timeout < 0) {
/* a timeout less than zero but not == INFTIM is invalid */
errno = EINVAL;
return (-1);
}
if (((ret = __sys_poll(fds, numfds, 0)) == 0) && (timeout != 0)) {
data.nfds = numfds;
data.fds = fds;
/*
* Clear revents in case of a timeout which leaves fds
* unchanged:
*/
for (i = 0; i < numfds; i++) {
fds[i].revents = 0;
}
curthread->data.poll_data = &data;
curthread->interrupted = 0;
_thread_kern_sched_state(PS_POLL_WAIT, __FILE__, __LINE__);
if (curthread->interrupted) {
errno = EINTR;
ret = -1;
} else {
ret = data.nfds;
}
}
return (ret);
}
int
__poll(struct pollfd *fds, unsigned int nfds, int timeout)
{
struct pthread *curthread = _get_curthread();
int ret;
_thr_cancel_enter(curthread);
ret = __sys_poll(fds, nfds, timeout);
_thr_cancel_leave(curthread, 1);
return ret;
}
