static int os_host_main_loop_wait(int64_t timeout) { GMainContext *context = g_main_context_default(); GPollFD poll_fds[1024 * 2]; /* this is probably overkill */ int select_ret = 0; int g_poll_ret, ret, i, n_poll_fds; PollingEntry *pe; WaitObjects *w = &wait_objects; gint poll_timeout; int64_t poll_timeout_ns; static struct timeval tv0; fd_set rfds, wfds, xfds; int nfds; /* XXX: need to suppress polling by better using win32 events */ ret = 0; for (pe = first_polling_entry; pe != NULL; pe = pe->next) { ret |= pe->func(pe->opaque); } if (ret != 0) { return ret; } FD_ZERO(&rfds); FD_ZERO(&wfds); FD_ZERO(&xfds); nfds = pollfds_fill(gpollfds, &rfds, &wfds, &xfds); if (nfds >= 0) { select_ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0); if (select_ret != 0) { timeout = 0; } if (select_ret > 0) { pollfds_poll(gpollfds, nfds, &rfds, &wfds, &xfds); } } g_main_context_prepare(context, &max_priority); n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout, poll_fds, ARRAY_SIZE(poll_fds)); g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds)); for (i = 0; i < w->num; i++) { poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i]; poll_fds[n_poll_fds + i].events = G_IO_IN; } if (poll_timeout < 0) { poll_timeout_ns = -1; } else { poll_timeout_ns = (int64_t)poll_timeout * (int64_t)SCALE_MS; } poll_timeout_ns = qemu_soonest_timeout(poll_timeout_ns, timeout); qemu_mutex_unlock_iothread(); g_poll_ret = qemu_poll_ns(poll_fds, n_poll_fds + w->num, poll_timeout_ns); qemu_mutex_lock_iothread(); if (g_poll_ret > 0) { for (i = 0; i < w->num; i++) { w->revents[i] = poll_fds[n_poll_fds + i].revents; } for (i = 0; i < w->num; i++) { if (w->revents[i] && w->func[i]) { w->func[i](w->opaque[i]); } } } if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) { g_main_context_dispatch(context); } return select_ret || g_poll_ret; }