Function io_wait_loop_sigio_rt

io_wait_loop.h:389–494

! \brief sigio rt version has no repeat (it doesn't make sense)*/

#ifdef HAVE_SIGIO_RT
/*! \brief sigio rt version has no repeat (it doesn't make sense)*/
inline static int io_wait_loop_sigio_rt(io_wait_h* h, int t)
{
	int n;
	int ret;
	struct timespec ts;
	siginfo_t siginfo;
	int sigio_band;
	int sigio_fd;
	struct fd_map* fm;

	ret=1; /* 1 event per call normally */
	ts.tv_sec=t;
	ts.tv_nsec=0;
	if (!sigismember(&h->sset, h->signo) || !sigismember(&h->sset, SIGIO)){
		LM_CRIT("[%s] the signal mask is not properly set!\n",h->name);
		goto error;
	}

again:
	n=sigtimedwait(&h->sset, &siginfo, &ts);
	if (n==-1){
		if (errno==EINTR) goto again; /* some other signal, ignore it */
		else if (errno==EAGAIN){ /* timeout */
			ret=0;
			goto end;
		}else{
			LM_ERR("[%s] sigtimed_wait %s [%d]\n",h->name,
				strerror(errno), errno);
			goto error;
		}
	}
	if (n!=SIGIO){
#ifdef SIGINFO64_WORKARROUND
		/* on linux siginfo.si_band is defined as long in userspace
		 * and as int kernel => on 64 bits things will break!
		 * (si_band will include si_fd, and si_fd will contain
		 *  garbage)
		 *  see /usr/src/linux/include/asm-generic/siginfo.h and
		 *      /usr/include/bits/siginfo.h
		 * -- andrei */
		if (sizeof(siginfo.si_band)>sizeof(int)){
			sigio_band=*((int*)&siginfo.si_band);
			sigio_fd=*(((int*)&siginfo.si_band)+1);
		}else
#endif
		{
			sigio_band=siginfo.si_band;
			sigio_fd=siginfo.si_fd;
		}
		if (siginfo.si_code==SI_SIGIO){
			/* old style, we don't know the event (linux 2.2.?) */
			LM_WARN("[%s] old style sigio interface\n",h->name);
			fm=get_fd_map(h, sigio_fd);
			/* we can have queued signals generated by fds not watched
			 * any more, or by fds in transition, to a child => ignore them*/
			if (fm->type)
				handle_io(fm, -1,IO_WATCH_READ);
		}else{