void svc_accessor::stop()
{
// stop main loop
if (main_loop_)
{
GMainLoop* loop = main_loop_.get();
if (loop && g_main_loop_is_running(loop))
{
g_main_loop_quit(loop);
loop_thread_->join();
// wait for exit thread
loop_thread_.reset();
}
// wait for clear context
GMainContext* main_context = g_main_loop_get_context(loop);
while(!g_main_context_acquire(main_context))
sched_yield();
g_main_context_release(main_context_.get());
main_context_.reset();
main_loop_.reset();
// unregister service
if (svc_)
svc_.reset();
}
}
void
ags_gui_task_thread_run(AgsThread *thread)
{
AgsGuiThread *gui_thread;
GMainContext *main_context;
gui_thread = AGS_AUDIO_LOOP(AGS_MAIN(AGS_DEVOUT(thread->devout)->ags_main)->main_loop)->gui_thread;
main_context = g_main_context_default();
if(!g_main_context_acquire(main_context)){
gboolean got_ownership = FALSE;
while(!got_ownership){
got_ownership = g_main_context_wait(main_context,
&(gui_thread->cond),
&(gui_thread->mutex));
}
}
gdk_threads_enter();
gdk_threads_leave();
g_main_context_iteration(main_context, FALSE);
AGS_THREAD_CLASS(ags_gui_task_thread_parent_class)->run(thread);
g_main_context_release(main_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);
}
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;
}
static void
soup_proxy_resolver_gnome_init (SoupProxyResolverGNOME *resolver_gnome)
{
GMainContext *default_context;
G_LOCK (resolver_gnome);
if (!gconf_client) {
/* GConf is not thread-safe, and we might be running
* in some random thread right now while other
* GConf-related activity is going on in the main
* thread. To prevent badness, we try to claim the
* default GMainContext; if we succeed, then either
* we're in the thread of the default GMainContext, or
* else there isn't currently any thread running the
* default GMainContext (meaning either the main loop
* hasn't been started yet, or else there is no main
* loop). Either way, it's safe to use GConf.
*
* If we can't manage to acquire the default
* GMainContext, then that means another thread
* already has it, so we use g_idle_add() to ask that
* thread to do the GConf initialization, and wait
* for that thread to finish.
*/
default_context = g_main_context_default ();
if (g_main_context_acquire (default_context)) {
init_gconf (NULL);
g_main_context_release (default_context);
} else {
SoupProxyResolverGNOMEInitData id;
id.lock = g_mutex_new ();
id.cond = g_cond_new ();
g_mutex_lock (id.lock);
g_idle_add (init_gconf, &id);
g_cond_wait (id.cond, id.lock);
g_mutex_unlock (id.lock);
g_cond_free (id.cond);
g_mutex_free (id.lock);
}
}
G_UNLOCK(resolver_gnome);
}
/** @internal Run the main loop.
*
* The main loop runs until su_source_break() is called from a callback.
*
* @param self pointer to port object
* */
static
void su_source_run(su_port_t *self)
{
GMainContext *gmc;
GMainLoop *gml;
enter;
gmc = g_source_get_context(self->sup_source);
if (gmc && g_main_context_acquire(gmc)) {
gml = g_main_loop_new(gmc, TRUE);
self->sup_main_loop = gml;
g_main_loop_run(gml);
g_main_loop_unref(gml);
self->sup_main_loop = NULL;
g_main_context_release(gmc);
}
}
void
grustna_main_loop_run_thread_local (GMainLoop *loop)
{
GMainContext *context;
gboolean context_acquired;
context = g_main_loop_get_context (loop);
context_acquired = g_main_context_acquire (context);
while (!context_acquired)
context_acquired = g_main_context_wait (context,
&rust_context_released_cond,
&rust_context_mutex);
g_main_context_push_thread_default (context);
g_main_loop_run (loop);
g_main_context_pop_thread_default (context);
g_main_context_release (context);
}
/** Set up the main context the session will be executing in.
*
* Must be called just before the session starts, by the thread which
* will execute the session main loop. Once acquired, the main context
* pointer is immutable for the duration of the session run.
*/
static int set_main_context(struct sr_session *session)
{
GMainContext *def_context;
/* May happen if sr_session_start() is called again after
* sr_session_run(), but the session hasn't been stopped yet.
*/
if (session->main_loop) {
sr_err("Cannot set main context; main loop already created.");
return SR_ERR;
}
g_mutex_lock(&session->main_mutex);
def_context = g_main_context_get_thread_default();
if (!def_context)
def_context = g_main_context_default();
/*
* Try to use an existing main context if possible, but only if we
* can make it owned by the current thread. Otherwise, create our
* own main context so that event source callbacks can execute in
* the session thread.
*/
if (g_main_context_acquire(def_context)) {
g_main_context_release(def_context);
sr_dbg("Using thread-default main context.");
session->main_context = def_context;
session->main_context_is_default = TRUE;
} else {
sr_dbg("Creating our own main context.");
session->main_context = g_main_context_new();
session->main_context_is_default = FALSE;
}
g_mutex_unlock(&session->main_mutex);
return SR_OK;
}
/** @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;
}
/** Set up the main context the session will be executing in.
*
* Must be called just before the session starts, by the thread which
* will execute the session main loop. Once acquired, the main context
* pointer is immutable for the duration of the session run.
*/
static int set_main_context(struct sr_session *session)
{
GMainContext *main_context;
g_mutex_lock(&session->main_mutex);
/* May happen if sr_session_start() is called a second time
* while the session is still running.
*/
if (session->main_context) {
sr_err("Main context already set.");
g_mutex_unlock(&session->main_mutex);
return SR_ERR;
}
main_context = g_main_context_ref_thread_default();
/*
* Try to use an existing main context if possible, but only if we
* can make it owned by the current thread. Otherwise, create our
* own main context so that event source callbacks can execute in
* the session thread.
*/
if (g_main_context_acquire(main_context)) {
g_main_context_release(main_context);
sr_dbg("Using thread-default main context.");
} else {
g_main_context_unref(main_context);
sr_dbg("Creating our own main context.");
main_context = g_main_context_new();
}
session->main_context = main_context;
g_mutex_unlock(&session->main_mutex);
return SR_OK;
}
static int os_host_main_loop_wait(int64_t timeout)
{
GMainContext *context = g_main_context_default();
int ret;
g_main_context_acquire(context);
glib_pollfds_fill(&timeout);
qemu_mutex_unlock_iothread();
replay_mutex_unlock();
ret = qemu_poll_ns((GPollFD *)gpollfds->data, gpollfds->len, timeout);
replay_mutex_lock();
qemu_mutex_lock_iothread();
glib_pollfds_poll();
g_main_context_release(context);
return ret;
}
static mst_Boolean
main_loop_poll (int ms)
{
GMainContext *context;
int timeout;
if (!loop || !g_main_loop_is_running (loop))
return FALSE;
if (!fds)
{
fds = g_new (GPollFD, 20);
allocated_nfds = 20;
}
context = g_main_loop_get_context (loop);
if (!g_main_context_acquire (context))
abort ();
timeout = -1;
g_main_context_prepare (context, &maxprio);
while ((nfds = g_main_context_query (context, maxprio,
&timeout, fds, allocated_nfds))
> allocated_nfds)
{
g_free (fds);
fds = g_new (GPollFD, nfds);
allocated_nfds = nfds;
}
if (ms != -1 && (timeout == -1 || timeout > ms))
timeout = ms;
g_main_context_release (context);
g_poll (fds, nfds, timeout);
return g_main_context_check (context, maxprio, fds, nfds);
}
static gpointer
loop_thread_init (gpointer data)
{
KmsLoop *self = KMS_LOOP (data);
GMainLoop *loop;
GMainContext *context;
KMS_LOOP_LOCK (self);
self->priv->context = g_main_context_new ();
context = g_main_context_ref (self->priv->context);
self->priv->loop = g_main_loop_new (context, FALSE);
loop = g_main_loop_ref (self->priv->loop);
KMS_LOOP_UNLOCK (self);
/* unlock main process because context is already initialized */
g_mutex_lock (&self->priv->mutex);
self->priv->initialized = TRUE;
g_cond_signal (&self->priv->cond);
g_mutex_unlock (&self->priv->mutex);
if (!g_main_context_acquire (context)) {
GST_ERROR ("Can not acquire context");
goto end;
}
GST_DEBUG ("Running main loop");
g_main_loop_run (loop);
g_main_context_release (context);
end:
GST_DEBUG ("Thread finished");
g_main_loop_unref (loop);
g_main_context_unref (context);
return NULL;
}
static void
call_minder (gpointer data, G_GNUC_UNUSED gpointer pool_data)
{
RustCallData *call_data = data;
GMainContext *context = call_data->context;
RustCallStatus status = RUST_CALL_PENDING;
gint64 end_time;
end_time = g_get_monotonic_time() + CALL_MINDER_TIMEOUT;
do
{
if (g_main_context_acquire (context))
{
status = call_data->status; /* No locking needed */
if (status == RUST_CALL_PENDING)
{
/* Nothing has been there to drive our call, let's do it now */
g_source_destroy (call_data->source);
g_main_context_push_thread_default (context);
call_data->func (call_data->param, context);
g_main_context_pop_thread_default (context);
g_mutex_lock (&call_mutex);
status = RUST_CALL_RETURNED;
call_data->status = status;
g_cond_signal (&call_data->return_cond);
g_mutex_unlock (&call_mutex);
}
g_main_context_release (context);
/* Unblock a potentially waiting
* grustna_main_loop_run_thread_local() */
g_cond_broadcast (&rust_context_released_cond);
}
else
{
gint64 wakeup_time;
g_mutex_lock (&call_mutex);
wakeup_time = g_get_monotonic_time () + call_data->minder_backoff;
if (wakeup_time > end_time)
{
g_critical ("call timed out waiting on context %p", call_data->context);
status = RUST_CALL_TIMED_OUT;
call_data->status = status;
g_cond_signal (&call_data->return_cond);
}
else
{
if (!g_cond_wait_until (&call_data->return_cond, &call_mutex,
wakeup_time))
call_data->minder_backoff *= 2;
status = call_data->status;
}
g_mutex_unlock (&call_mutex);
}
}
while (status == RUST_CALL_PENDING);
call_data_unref (call_data);
}
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;
g_main_context_acquire(context);
/* 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) {
g_main_context_release(context);
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();
replay_mutex_unlock();
g_poll_ret = qemu_poll_ns(poll_fds, n_poll_fds + w->num, poll_timeout_ns);
replay_mutex_lock();
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);
}
g_main_context_release(context);
return select_ret || g_poll_ret;
}
/**
* g_tls_interaction_invoke_ask_password:
* @interaction: a #GTlsInteraction object
* @password: a #GTlsPassword object
* @cancellable: an optional #GCancellable cancellation object
* @error: an optional location to place an error on failure
*
* Invoke the interaction to ask the user for a password. It invokes this
* interaction in the main loop, specifically the #GMainContext returned by
* g_main_context_get_thread_default() when the interaction is created. This
* is called by called by #GTlsConnection or #GTlsDatabase to ask the user
* for a password.
*
* Derived subclasses usually implement a password prompt, although they may
* also choose to provide a password from elsewhere. The @password value will
* be filled in and then @callback will be called. Alternatively the user may
* abort this password request, which will usually abort the TLS connection.
*
* The implementation can either be a synchronous (eg: modal dialog) or an
* asynchronous one (eg: modeless dialog). This function will take care of
* calling which ever one correctly.
*
* If the interaction is cancelled by the cancellation object, or by the
* user then %G_TLS_INTERACTION_FAILED will be returned with an error that
* contains a %G_IO_ERROR_CANCELLED error code. Certain implementations may
* not support immediate cancellation.
*
* Returns: The status of the ask password interaction.
*
* Since: 2.30
*/
GTlsInteractionResult
g_tls_interaction_invoke_ask_password (GTlsInteraction *interaction,
GTlsPassword *password,
GCancellable *cancellable,
GError **error)
{
GTlsInteractionResult result;
InvokeClosure *closure;
GTlsInteractionClass *klass;
g_return_val_if_fail (G_IS_TLS_INTERACTION (interaction), G_TLS_INTERACTION_UNHANDLED);
g_return_val_if_fail (G_IS_TLS_PASSWORD (password), G_TLS_INTERACTION_UNHANDLED);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), G_TLS_INTERACTION_UNHANDLED);
closure = invoke_closure_new (interaction, G_OBJECT (password), cancellable);
klass = G_TLS_INTERACTION_GET_CLASS (interaction);
if (klass->ask_password)
{
g_main_context_invoke (interaction->priv->context,
on_invoke_ask_password_sync, closure);
result = invoke_closure_wait_and_free (closure, error);
}
else if (klass->ask_password_async)
{
g_return_val_if_fail (klass->ask_password_finish, G_TLS_INTERACTION_UNHANDLED);
g_main_context_invoke (interaction->priv->context,
on_invoke_ask_password_async_as_sync, closure);
/*
* Handle the case where we've been called from within the main context
* or in the case where the main context is not running. This approximates
* the behavior of a modal dialog.
*/
if (g_main_context_acquire (interaction->priv->context))
{
while (!closure->complete)
{
g_mutex_unlock (closure->mutex);
g_main_context_iteration (interaction->priv->context, TRUE);
g_mutex_lock (closure->mutex);
}
g_main_context_release (interaction->priv->context);
if (closure->error)
{
g_propagate_error (error, closure->error);
closure->error = NULL;
}
result = closure->result;
invoke_closure_free (closure);
}
/*
* Handle the case where we're in a different thread than the main
* context and a main loop is running.
*/
else
{
result = invoke_closure_wait_and_free (closure, error);
}
}
else
{
result = G_TLS_INTERACTION_UNHANDLED;
invoke_closure_free (closure);
}
return result;
}
static void glib_release(glib_glue_t *glue)
{
g_main_context_release(glue->mc);
}
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;
}
/**
* gcr_importer_import:
* @importer: the importer
* @cancellable: a #GCancellable, or %NULL
* @error: the location to place an error on failure, or %NULL
*
* Import the queued items in the importer. This call will block
* until the operation completes.
*
* Returns: whether the items were imported successfully or not
*/
gboolean
gcr_importer_import (GcrImporter *importer,
GCancellable *cancellable,
GError **error)
{
gboolean result;
ImportClosure *closure;
GcrImporterIface *iface;
g_return_val_if_fail (GCR_IS_IMPORTER (importer), FALSE);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
iface = GCR_IMPORTER_GET_INTERFACE (importer);
if (iface->import_sync)
return (iface->import_sync) (importer, cancellable, error);
g_return_val_if_fail (iface->import_async != NULL, FALSE);
g_return_val_if_fail (iface->import_finish != NULL, FALSE);
closure = g_new0 (ImportClosure, 1);
closure->cond = g_new (GCond, 1);
g_cond_init (closure->cond);
closure->mutex = g_new (GMutex, 1);
g_mutex_init (closure->mutex);
closure->context = g_main_context_get_thread_default ();
g_mutex_lock (closure->mutex);
(iface->import_async) (importer, cancellable, on_import_async_complete, closure);
/*
* Handle the case where we've been called from within the main context
* or in the case where the main context is not running. This approximates
* the behavior of a modal dialog.
*/
if (g_main_context_acquire (closure->context)) {
while (!closure->complete) {
g_mutex_unlock (closure->mutex);
g_main_context_iteration (closure->context, TRUE);
g_mutex_lock (closure->mutex);
}
g_main_context_release (closure->context);
/*
* Handle the case where we're in a different thread than the main
* context and a main loop is running.
*/
} else {
while (!closure->complete)
g_cond_wait (closure->cond, closure->mutex);
}
g_mutex_unlock (closure->mutex);
result = (closure->error == NULL);
if (closure->error)
g_propagate_error (error, closure->error);
g_cond_clear (closure->cond);
g_free (closure->cond);
g_mutex_clear (closure->mutex);
g_free (closure->mutex);
g_free (closure);
return result;
}
gboolean
grustna_call (RustFunc func, gpointer data, GMainContext *context)
{
gboolean thread_default_context = FALSE;
g_return_val_if_fail (func != NULL, FALSE);
if (context == NULL)
{
context = g_main_context_get_thread_default ();
if (context == NULL)
context = get_rust_thread_context ();
else
thread_default_context = TRUE;
}
/* This code is based on g_main_context_invoke_full() */
if (g_main_context_is_owner (context))
{
/* Fastest path: the caller is in the same thread where some code
* is supposedly driving the loop context affine to this call. */
func (data, context);
return TRUE;
}
if (g_main_context_acquire (context))
{
/* Here, we get to exclusively use the desired loop context
* that is not (yet) driven by an event loop.
* This is perfectly OK for non-async functions on objects affine
* to this context, and matches the behavior of GIO-style async calls
* that rely on the thread-default context to be eventually driven
* in order to complete. */
if (!thread_default_context)
g_main_context_push_thread_default (context);
func (data, context);
if (!thread_default_context)
g_main_context_pop_thread_default (context);
g_main_context_release (context);
/* Unblock a potentially waiting
* grustna_main_loop_run_thread_local() */
g_cond_broadcast (&rust_context_released_cond);
return TRUE;
}
else
{
/* Shunt the call to the loop thread
* and wait for it to complete. */
RustCallData *call_data;
RustCallStatus status;
GSource *idle;
call_data = g_slice_new0 (RustCallData);
call_data->func = func;
call_data->param = data;
call_data->context = g_main_context_ref (context);
call_data->ref_count = 3;
call_data->minder_backoff = 1 * G_TIME_SPAN_MILLISECOND;
call_data->status = RUST_CALL_PENDING;
idle = g_idle_source_new ();
g_source_set_priority (idle, G_PRIORITY_DEFAULT);
g_source_set_callback (idle, loop_callback, call_data, NULL);
g_source_attach (idle, context);
call_data->source = idle;
g_cond_init (&call_data->return_cond);
add_call_minder (call_data);
g_mutex_lock (&call_mutex);
while ((status = call_data->status) == RUST_CALL_PENDING)
g_cond_wait (&call_data->return_cond, &call_mutex);
g_mutex_unlock (&call_mutex);
call_data_unref (call_data);
return status == RUST_CALL_RETURNED;
}
}