static void glib_select_poll(fd_set *rfds, fd_set *wfds, fd_set *xfds,
bool err)
{
GMainContext *context = g_main_context_default();
if (!err) {
int i;
for (i = 0; i < n_poll_fds; i++) {
GPollFD *p = &poll_fds[i];
if ((p->events & G_IO_IN) && FD_ISSET(p->fd, rfds)) {
p->revents |= G_IO_IN;
}
if ((p->events & G_IO_OUT) && FD_ISSET(p->fd, wfds)) {
p->revents |= G_IO_OUT;
}
if ((p->events & G_IO_ERR) && FD_ISSET(p->fd, xfds)) {
p->revents |= G_IO_ERR;
}
}
}
if (g_main_context_check(context, max_priority, poll_fds, n_poll_fds)) {
g_main_context_dispatch(context);
}
}
static void glib_pollfds_poll(void)
{
GMainContext *context = g_main_context_default();
GPollFD *pfds = &g_array_index(gpollfds, GPollFD, glib_pollfds_idx);
if (g_main_context_check(context, max_priority, pfds, glib_n_poll_fds)) {
g_main_context_dispatch(context);
}
}
static void
main_loop_dispatch (void)
{
GMainContext *context = g_main_loop_get_context (loop);
if (!g_main_context_acquire (context))
abort ();
g_main_context_dispatch (context);
g_main_context_release (context);
}
static void glib_dispatch(void *user_data)
{
glib_glue_t *glue = (glib_glue_t *)user_data;
mrp_debug("*** GMainLoop <%p>: dispatching...", user_data);
glib_acquire(glue);
g_main_context_dispatch(glue->mc);
glib_release(glue);
}
MOSHEXPORT
void
mglib_loop_dispatch(void* fds, int count){
gint r;
r = g_main_context_check(g_main_context_default(),
999999, /* FIXME: */
(GPollFD* )fds,
count);
//printf("dispatch: %d\n",r);
if(r == TRUE){
g_main_context_dispatch(g_main_context_default());
}
}
CAMLprim value lwt_glib_iter(value may_block)
{
GMainContext *gc;
gint max_priority, timeout;
GPollFD *pollfds = NULL;
gint pollfds_size = 0;
gint nfds;
gint i;
/* Get the main context. */
gc = g_main_context_default();
/* Try to acquire it. */
if (!g_main_context_acquire(gc))
caml_failwith("Lwt_glib.iter");
/* Dispatch pending events. */
g_main_context_dispatch(gc);
/* Prepare the context for polling. */
g_main_context_prepare(gc, &max_priority);
/* Get all file descriptors to poll. */
while (pollfds_size < (nfds = g_main_context_query(gc, max_priority, &timeout, pollfds, pollfds_size))) {
free(pollfds);
pollfds_size = nfds;
pollfds = lwt_unix_malloc(pollfds_size * sizeof (GPollFD));
}
/* Clear all revents fields. */
for (i = 0; i < nfds; i++) pollfds[i].revents = 0;
/* Set the timeout to 0 if we do not want to block. */
if (!Bool_val(may_block)) timeout = 0;
/* Do the blocking call. */
caml_enter_blocking_section();
g_main_context_get_poll_func(gc)(pollfds, nfds, timeout);
caml_leave_blocking_section();
/* Let glib parse the result. */
g_main_context_check(gc, max_priority, pollfds, nfds);
/* Release the context. */
g_main_context_release(gc);
free(pollfds);
return Val_unit;
}
void mainLoop ()
{
GPollFD dpy_pollfd = {x_fd, G_IO_IN, 0};// | G_IO_HUP | G_IO_ERR
GSourceFuncs x11_source_funcs = {
x11_fd_prepare,
x11_fd_check, x11_fd_dispatch,
NULL, /* finalize */
NULL, /* closure_callback */
NULL /* closure_marshal */
};
GSource *x11_source = g_source_new(&x11_source_funcs, sizeof(x11_source_t));
((x11_source_t*)x11_source)->dpy = dpy;
((x11_source_t*)x11_source)->pending_events = 0;
g_source_add_poll(x11_source, &dpy_pollfd);
g_source_attach(x11_source,NULL); /* must use default context so that DBus signal handling is not impeded */
{
#if 0
GMainLoop *mainloop = g_main_loop_new(NULL,FALSE);
g_main_loop_run(mainloop);
#else
GMainContext *ctx = g_main_context_default ();
GPollFD qfd_a[10];
do {
gint timeout;
int priority = 0;
int i;
g_main_context_prepare (ctx, &priority);
gint recordCount = g_main_context_query(ctx, 2, &timeout, qfd_a, 10);
/* we need to specify the timeout, in order for glib signals to propagate properly
Ain't that stupid!!!!!! */
g_poll (qfd_a, recordCount, 200);
/* don't want to trust glib's main loop with our X event handling - it gets all screwed up */
#if 1
for (i = 0 ; i < recordCount ; ++i)
if (qfd_a[i].revents) {
/* show_progress ( "%d: fd = %d, events = 0x%X, revents = 0x%X", time(NULL), qfd_a[i].fd, qfd_a[i].events, qfd_a[i].revents); */
if (qfd_a[i].fd == x_fd) {
HandleXEvent();
qfd_a[i].revents = 0;
}
}
#endif
g_main_context_check(ctx, -1, qfd_a, recordCount);
g_main_context_dispatch (ctx);
}while (1);
#endif
}
}
static void
glibDispatch (CompDisplay *display,
GMainContext *context)
{
int i;
GLIB_DISPLAY (display);
g_main_context_check (context, gd->maxPriority, gd->fds, gd->nFds);
g_main_context_dispatch (context);
for (i = 0; i < gd->nFds; i++)
compRemoveWatchFd (gd->watch[i].handle);
}
CAMLprim value lwt_glib_get_sources(value Unit)
{
gint timeout;
int i;
int events;
GPollFD *gpollfd;
CAMLparam0();
CAMLlocal3(fds, watches, result);
g_main_context_dispatch(gc);
g_main_context_prepare(gc, &max_priority);
while (fds_count < (n_fds = g_main_context_query(gc, max_priority, &timeout, gpollfds, fds_count))) {
free(gpollfds);
fds_count = n_fds;
gpollfds = lwt_unix_malloc(fds_count * sizeof (GPollFD));
}
fds = caml_alloc_tuple(n_fds);
watches = caml_alloc_tuple(n_fds);
for (i = 0; i < n_fds; i++) {
gpollfd = gpollfds + i;
gpollfd->revents = 0;
events = 0;
if (gpollfd->events & G_IO_IN) events |= 1;
if (gpollfd->events & G_IO_OUT) events |= 2;
#if defined(LWT_ON_WINDOWS)
/* On windows, glib file descriptors are handles */
Field(fds, i) = alloc_fd((HANDLE)gpollfd->fd);
#else
Field(fds, i) = Val_int(gpollfd->fd);
if (gpollfd->fd < 0) events = 0;
#endif
Field(watches, i) = Val_int(events);
}
result = caml_alloc_tuple(3);
Store_field(result, 0, fds);
Store_field(result, 1, watches);
Store_field(result, 2, caml_copy_double(timeout * 1e-3));
CAMLreturn(result);
}
/** @internal Block until wait object is signaled or timeout.
*
* This function waits for wait objects and the timers associated with
* the root object. When any wait object is signaled or timer is
* expired, it invokes the callbacks.
*
* This function returns when a callback has been invoked or @c tout
* milliseconds is elapsed.
*
* @param self pointer to port
* @param tout timeout in milliseconds
*
* @Return
* Milliseconds to the next invocation of timer, or @c SU_WAIT_FOREVER if
* there are no active timers.
*/
su_duration_t su_source_step(su_port_t *self, su_duration_t tout)
{
GMainContext *gmc;
enter;
gmc = g_source_get_context(self->sup_source);
if (gmc && g_main_context_acquire(gmc)) {
GPollFD *fds = NULL;
gint fds_size = 0;
gint fds_wait;
gint priority = G_MAXINT;
gint src_tout = -1;
g_main_context_prepare(gmc, &priority);
fds_wait = g_main_context_query(gmc, priority, &src_tout, NULL, 0);
while (fds_wait > fds_size) {
fds = g_alloca(fds_wait * sizeof(fds[0]));
fds_size = fds_wait;
fds_wait = g_main_context_query(gmc, priority, &src_tout, fds, fds_size);
}
if (src_tout >= 0 && tout > (su_duration_t)src_tout)
tout = src_tout;
su_wait((su_wait_t *)fds, fds_wait, tout);
g_main_context_check(gmc, priority, fds, fds_wait);
g_main_context_dispatch(gmc);
g_main_context_release(gmc);
}
return 0;
}
int
xg_select (int fds_lim, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds,
EMACS_TIME *timeout, sigset_t *sigmask)
{
SELECT_TYPE all_rfds, all_wfds;
EMACS_TIME tmo, *tmop = timeout;
GMainContext *context;
int have_wfds = wfds != NULL;
GPollFD gfds_buf[128];
GPollFD *gfds = gfds_buf;
int gfds_size = sizeof gfds_buf / sizeof *gfds_buf;
int n_gfds, retval = 0, our_fds = 0, max_fds = fds_lim - 1;
int i, nfds, tmo_in_millisec;
USE_SAFE_ALLOCA;
if (! (x_in_use
&& g_main_context_pending (context = g_main_context_default ())))
return pselect (fds_lim, rfds, wfds, efds, timeout, sigmask);
if (rfds) all_rfds = *rfds;
else FD_ZERO (&all_rfds);
if (wfds) all_wfds = *wfds;
else FD_ZERO (&all_wfds);
n_gfds = g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size);
if (gfds_size < n_gfds)
{
SAFE_NALLOCA (gfds, sizeof *gfds, n_gfds);
gfds_size = n_gfds;
n_gfds = g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size);
}
for (i = 0; i < n_gfds; ++i)
{
if (gfds[i].events & G_IO_IN)
{
FD_SET (gfds[i].fd, &all_rfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
}
if (gfds[i].events & G_IO_OUT)
{
FD_SET (gfds[i].fd, &all_wfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
have_wfds = 1;
}
}
SAFE_FREE ();
if (tmo_in_millisec >= 0)
{
tmo = make_emacs_time (tmo_in_millisec / 1000,
1000 * 1000 * (tmo_in_millisec % 1000));
if (!timeout || EMACS_TIME_LT (tmo, *timeout))
tmop = &tmo;
}
fds_lim = max_fds + 1;
nfds = pselect (fds_lim, &all_rfds, have_wfds ? &all_wfds : NULL,
efds, tmop, sigmask);
if (nfds < 0)
retval = nfds;
else if (nfds > 0)
{
for (i = 0; i < fds_lim; ++i)
{
if (FD_ISSET (i, &all_rfds))
{
if (rfds && FD_ISSET (i, rfds)) ++retval;
else ++our_fds;
}
else if (rfds)
FD_CLR (i, rfds);
if (have_wfds && FD_ISSET (i, &all_wfds))
{
if (wfds && FD_ISSET (i, wfds)) ++retval;
else ++our_fds;
}
else if (wfds)
FD_CLR (i, wfds);
if (efds && FD_ISSET (i, efds))
++retval;
}
}
if (our_fds > 0 || (nfds == 0 && tmop == &tmo))
{
/* If Gtk+ is in use eventually gtk_main_iteration will be called,
unless retval is zero. */
#ifdef USE_GTK
if (retval == 0)
#endif
while (g_main_context_pending (context))
g_main_context_dispatch (context);
/* To not have to recalculate timeout, return like this. */
if (retval == 0)
{
retval = -1;
errno = EINTR;
}
}
return retval;
}
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;
}
CAMLprim value lwt_glib_poll(value val_fds, value val_count, value val_timeout)
{
gint timeout, lwt_timeout;
long count;
int i;
GPollFD *gpollfd;
gint events, revents;
CAMLparam3(val_fds, val_count, val_timeout);
CAMLlocal5(node, src, node_result, src_result, tmp);
count = Long_val(val_count);
g_main_context_dispatch(gc);
g_main_context_prepare(gc, &max_priority);
while (fds_count < count + (n_fds = g_main_context_query(gc, max_priority, &timeout, gpollfds, fds_count))) {
free(gpollfds);
fds_count = n_fds + count;
gpollfds = lwt_unix_malloc(fds_count * sizeof (GPollFD));
}
/* Clear all revents fields. */
for (i = 0; i < n_fds + count; i++) gpollfds[i].revents = 0;
/* Add all Lwt fds. */
for (i = n_fds, node = val_fds; i < n_fds + count; i++, node = Field(node, 1)) {
src = Field(node, 0);
gpollfd = gpollfds + i;
#if defined(LWT_ON_WINDOWS)
gpollfd->fd = Handle_val(Field(src, 0));
#else
gpollfd->fd = Int_val(Field(src, 0));
#endif
events = 0;
if (Bool_val(Field(src, 1))) events |= G_IO_IN;
if (Bool_val(Field(src, 2))) events |= G_IO_OUT;
gpollfd->events = events;
}
lwt_timeout = Int_val(val_timeout);
if (timeout < 0 || (lwt_timeout >= 0 && lwt_timeout < timeout))
timeout = lwt_timeout;
/* Do the blocking call. */
caml_enter_blocking_section();
g_main_context_get_poll_func(gc)(gpollfds, n_fds + count, timeout);
caml_leave_blocking_section();
g_main_context_check(gc, max_priority, gpollfds, n_fds);
/* Build the result. */
node_result = Val_int(0);
for (i = n_fds, node = val_fds; i < n_fds + count; i++, node = Field(node, 1)) {
gpollfd = gpollfds + i;
src_result = caml_alloc_tuple(3);
src = Field(node, 0);
Field(src_result, 0) = Field(src, 0);
revents = gpollfd->revents;
if (revents & G_IO_HUP) {
/* Treat HUP as ready. There's no point continuing to wait on this FD. */
if (gpollfd->events & G_IO_IN)
revents |= G_IO_IN;
if (gpollfd->events & G_IO_OUT)
revents |= G_IO_OUT;
}
Field(src_result, 1) = Val_bool(revents & G_IO_IN);
Field(src_result, 2) = Val_bool(revents & G_IO_OUT);
tmp = caml_alloc_tuple(2);
Field(tmp, 0) = src_result;
Field(tmp, 1) = node_result;
node_result = tmp;
}
CAMLreturn(node_result);
}
int
xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
struct timespec *timeout, sigset_t *sigmask)
{
fd_set all_rfds, all_wfds;
struct timespec tmo;
struct timespec *tmop = timeout;
GMainContext *context;
bool have_wfds = wfds != NULL;
GPollFD gfds_buf[128];
GPollFD *gfds = gfds_buf;
int gfds_size = ARRAYELTS (gfds_buf);
int n_gfds, retval = 0, our_fds = 0, max_fds = fds_lim - 1;
bool context_acquired = false;
int i, nfds, tmo_in_millisec, must_free = 0;
bool need_to_dispatch;
context = g_main_context_default ();
context_acquired = g_main_context_acquire (context);
/* FIXME: If we couldn't acquire the context, we just silently proceed
because this function handles more than just glib file descriptors.
Note that, as implemented, this failure is completely silent: there is
no feedback to the caller. */
if (rfds) all_rfds = *rfds;
else FD_ZERO (&all_rfds);
if (wfds) all_wfds = *wfds;
else FD_ZERO (&all_wfds);
n_gfds = (context_acquired
? g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size)
: -1);
if (gfds_size < n_gfds)
{
/* Avoid using SAFE_NALLOCA, as that implicitly refers to the
current thread. Using xnmalloc avoids thread-switching
problems here. */
gfds = xnmalloc (n_gfds, sizeof *gfds);
must_free = 1;
gfds_size = n_gfds;
n_gfds = g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size);
}
for (i = 0; i < n_gfds; ++i)
{
if (gfds[i].events & G_IO_IN)
{
FD_SET (gfds[i].fd, &all_rfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
}
if (gfds[i].events & G_IO_OUT)
{
FD_SET (gfds[i].fd, &all_wfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
have_wfds = true;
}
}
if (must_free)
xfree (gfds);
if (n_gfds >= 0 && tmo_in_millisec >= 0)
{
tmo = make_timespec (tmo_in_millisec / 1000,
1000 * 1000 * (tmo_in_millisec % 1000));
if (!timeout || timespec_cmp (tmo, *timeout) < 0)
tmop = &tmo;
}
fds_lim = max_fds + 1;
nfds = thread_select (pselect, fds_lim,
&all_rfds, have_wfds ? &all_wfds : NULL, efds,
tmop, sigmask);
if (nfds < 0)
retval = nfds;
else if (nfds > 0)
{
for (i = 0; i < fds_lim; ++i)
{
if (FD_ISSET (i, &all_rfds))
{
if (rfds && FD_ISSET (i, rfds)) ++retval;
else ++our_fds;
}
else if (rfds)
FD_CLR (i, rfds);
if (have_wfds && FD_ISSET (i, &all_wfds))
{
if (wfds && FD_ISSET (i, wfds)) ++retval;
else ++our_fds;
}
else if (wfds)
FD_CLR (i, wfds);
if (efds && FD_ISSET (i, efds))
++retval;
}
}
/* If Gtk+ is in use eventually gtk_main_iteration will be called,
unless retval is zero. */
#ifdef USE_GTK
need_to_dispatch = retval == 0;
#else
need_to_dispatch = true;
#endif
if (need_to_dispatch && context_acquired)
{
int pselect_errno = errno;
/* Prevent g_main_dispatch recursion, that would occur without
block_input wrapper, because event handlers call
unblock_input. Event loop recursion was causing Bug#15801. */
block_input ();
while (g_main_context_pending (context))
g_main_context_dispatch (context);
unblock_input ();
errno = pselect_errno;
}
if (context_acquired)
g_main_context_release (context);
/* To not have to recalculate timeout, return like this. */
if ((our_fds > 0 || (nfds == 0 && tmop == &tmo)) && (retval == 0))
{
retval = -1;
errno = EINTR;
}
return retval;
}
int
xg_select (int max_fds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds,
EMACS_TIME *timeout)
{
SELECT_TYPE all_rfds, all_wfds;
EMACS_TIME tmo, *tmop = timeout;
GMainContext *context = g_main_context_default ();
int have_wfds = wfds != NULL;
int n_gfds = 0, our_tmo = 0, retval = 0, our_fds = 0;
int i, nfds, tmo_in_millisec;
if (rfds) memcpy (&all_rfds, rfds, sizeof (all_rfds));
else FD_ZERO (&all_rfds);
if (wfds) memcpy (&all_wfds, wfds, sizeof (all_rfds));
else FD_ZERO (&all_wfds);
/* Update event sources in GLib. */
g_main_context_pending (context);
do {
if (n_gfds > gfds_size)
{
while (n_gfds > gfds_size)
gfds_size *= 2;
xfree (gfds);
gfds = xmalloc (sizeof (*gfds) * gfds_size);
}
n_gfds = g_main_context_query (context,
G_PRIORITY_LOW,
&tmo_in_millisec,
gfds,
gfds_size);
} while (n_gfds > gfds_size);
for (i = 0; i < n_gfds; ++i)
{
if (gfds[i].events & G_IO_IN)
{
FD_SET (gfds[i].fd, &all_rfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
}
if (gfds[i].events & G_IO_OUT)
{
FD_SET (gfds[i].fd, &all_wfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
have_wfds = 1;
}
}
if (tmo_in_millisec >= 0)
{
EMACS_SET_SECS_USECS (tmo, tmo_in_millisec/1000,
1000 * (tmo_in_millisec % 1000));
if (!timeout) our_tmo = 1;
else
{
EMACS_TIME difference;
EMACS_SUB_TIME (difference, tmo, *timeout);
if (EMACS_TIME_NEG_P (difference)) our_tmo = 1;
}
if (our_tmo) tmop = &tmo;
}
nfds = select (max_fds+1, &all_rfds, have_wfds ? &all_wfds : NULL,
efds, tmop);
if (nfds < 0)
retval = nfds;
else if (nfds > 0)
{
for (i = 0; i < max_fds+1; ++i)
{
if (FD_ISSET (i, &all_rfds))
{
if (rfds && FD_ISSET (i, rfds)) ++retval;
else ++our_fds;
}
else if (rfds)
FD_CLR (i, rfds);
if (have_wfds && FD_ISSET (i, &all_wfds))
{
if (wfds && FD_ISSET (i, wfds)) ++retval;
else ++our_fds;
}
else if (wfds)
FD_CLR (i, wfds);
if (efds && FD_ISSET (i, efds))
++retval;
}
}
if (our_fds > 0 || (nfds == 0 && our_tmo))
{
/* If Gtk+ is in use eventually gtk_main_iteration will be called,
unless retval is zero. */
#ifdef USE_GTK
if (retval == 0)
#endif
while (g_main_context_pending (context))
g_main_context_dispatch (context);
/* To not have to recalculate timeout, return like this. */
if (retval == 0)
{
retval = -1;
errno = EINTR;
}
}
return retval;
}
static int os_host_main_loop_wait(uint32_t timeout)
{
GMainContext *context = g_main_context_default();
int ret, i;
PollingEntry *pe;
WaitObjects *w = &wait_objects;
gint poll_timeout;
static struct timeval tv0;
/* 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;
}
if (nfds >= 0) {
ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
if (ret != 0) {
timeout = 0;
}
}
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 || timeout < poll_timeout) {
poll_timeout = timeout;
}
qemu_mutex_unlock_iothread();
ret = g_poll(poll_fds, n_poll_fds + w->num, poll_timeout);
qemu_mutex_lock_iothread();
if (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);
}
/* If an edge-triggered socket event occurred, select will return a
* positive result on the next iteration. We do not need to do anything
* here.
*/
return ret;
}
int
xg_select (int fds_lim, fd_set *rfds, fd_set *wfds, fd_set *efds,
struct timespec const *timeout, sigset_t const *sigmask)
{
fd_set all_rfds, all_wfds;
struct timespec tmo;
struct timespec const *tmop = timeout;
GMainContext *context;
int have_wfds = wfds != NULL;
GPollFD gfds_buf[128];
GPollFD *gfds = gfds_buf;
int gfds_size = ARRAYELTS (gfds_buf);
int n_gfds, retval = 0, our_fds = 0, max_fds = fds_lim - 1;
int i, nfds, tmo_in_millisec;
bool need_to_dispatch;
USE_SAFE_ALLOCA;
context = g_main_context_default ();
if (rfds) all_rfds = *rfds;
else FD_ZERO (&all_rfds);
if (wfds) all_wfds = *wfds;
else FD_ZERO (&all_wfds);
n_gfds = g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size);
if (gfds_size < n_gfds)
{
SAFE_NALLOCA (gfds, sizeof *gfds, n_gfds);
gfds_size = n_gfds;
n_gfds = g_main_context_query (context, G_PRIORITY_LOW, &tmo_in_millisec,
gfds, gfds_size);
}
for (i = 0; i < n_gfds; ++i)
{
if (gfds[i].events & G_IO_IN)
{
FD_SET (gfds[i].fd, &all_rfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
}
if (gfds[i].events & G_IO_OUT)
{
FD_SET (gfds[i].fd, &all_wfds);
if (gfds[i].fd > max_fds) max_fds = gfds[i].fd;
have_wfds = 1;
}
}
SAFE_FREE ();
if (tmo_in_millisec >= 0)
{
tmo = make_timespec (tmo_in_millisec / 1000,
1000 * 1000 * (tmo_in_millisec % 1000));
if (!timeout || timespec_cmp (tmo, *timeout) < 0)
tmop = &tmo;
}
fds_lim = max_fds + 1;
nfds = pselect (fds_lim, &all_rfds, have_wfds ? &all_wfds : NULL,
efds, tmop, sigmask);
if (nfds < 0)
retval = nfds;
else if (nfds > 0)
{
for (i = 0; i < fds_lim; ++i)
{
if (FD_ISSET (i, &all_rfds))
{
if (rfds && FD_ISSET (i, rfds)) ++retval;
else ++our_fds;
}
else if (rfds)
FD_CLR (i, rfds);
if (have_wfds && FD_ISSET (i, &all_wfds))
{
if (wfds && FD_ISSET (i, wfds)) ++retval;
else ++our_fds;
}
else if (wfds)
FD_CLR (i, wfds);
if (efds && FD_ISSET (i, efds))
++retval;
}
}
/* If Gtk+ is in use eventually gtk_main_iteration will be called,
unless retval is zero. */
#ifdef USE_GTK
need_to_dispatch = retval == 0;
#else
need_to_dispatch = true;
#endif
if (need_to_dispatch)
{
int pselect_errno = errno;
/* Prevent g_main_dispatch recursion, that would occur without
block_input wrapper, because event handlers call
unblock_input. Event loop recursion was causing Bug#15801. */
block_input ();
while (g_main_context_pending (context))
g_main_context_dispatch (context);
unblock_input ();
errno = pselect_errno;
}
/* To not have to recalculate timeout, return like this. */
if ((our_fds > 0 || (nfds == 0 && tmop == &tmo)) && (retval == 0))
{
retval = -1;
errno = EINTR;
}
return retval;
}
