static void lio_sighandler(int signo, siginfo_t *info, void *ucontext)
{
FAR struct aiocb *aiocbp;
FAR struct lio_sighand_s *sighand;
int ret;
DEBUGASSERT(signo == SIGPOLL && info);
/* The info structure should contain a pointer to the AIO control block */
aiocbp = (FAR struct aiocb *)info->si_value.sival_ptr;
DEBUGASSERT(aiocbp && aiocbp->aio_result != -EINPROGRESS);
/* Recover our private data from the AIO control block */
sighand = (FAR struct lio_sighand_s *)aiocbp->aio_priv;
DEBUGASSERT(sighand && sighand->list);
aiocbp->aio_priv = NULL;
/* Prevent any asynchronous I/O completions while the signal handler runs */
sched_lock();
/* Check if all of the pending I/O has completed */
ret = lio_checkio(sighand->list, sighand->nent);
if (ret != -EINPROGRESS) {
/* All pending I/O has completed */
/* Restore the signal handler */
(void)sigaction(SIGPOLL, &sighand->oact, NULL);
/* Restore the sigprocmask */
(void)sigprocmask(SIG_SETMASK, &sighand->oprocmask, NULL);
/* Signal the client */
if (sighand->sig->sigev_notify == SIGEV_SIGNAL) {
#ifdef CONFIG_CAN_PASS_STRUCTS
(void)sigqueue(sighand->pid, sighand->sig->sigev_signo, sighand->sig->sigev_value);
#else
(void)sigqueue(sighand->pid, sighand->sig->sigev_signo, sighand->sig->sigev_value.sival_ptr);
#endif
}
/* And free the container */
lib_free(sighand);
}
sched_unlock();
}
static int lio_waitall(FAR struct aiocb * const *list, int nent)
{
sigset_t set;
int ret;
/* Loop until all I/O completes */
for (; ; )
{
/* Check if all I/O has completed */
ret = lio_checkio(list, nent);
if (ret != -EINPROGRESS)
{
/* All I/O has completed.. We are finished. */
return ret;
}
/* Then wait for SIGPOLL -- indefinitely.
*
* NOTE: If completion of the I/O causes other signals to be generated
* first, then this will wake up and return EINTR instead of success.
*/
sigemptyset(&set);
sigaddset(&set, SIGPOLL);
ret = sigwaitinfo(&set, NULL);
if (ret < 0)
{
/* The most likely reason that we would get here is because some
* unrelated signal has been received.
*/
int errcode = get_errno();
ferr("ERROR: sigwaitinfo failed: %d\n", errcode);
DEBUGASSERT(errcode > 0);
return -errcode;
}
}
}
