static gboolean
shm_writer_fd_cb (GIOChannel *source,
GIOCondition condition,
gpointer data)
{
ShmWriterPrivate *priv = SHM_WRITER (data)->priv;
if (condition == G_IO_IN)
{
ShmWriterClientPair *pair;
ShmClient *client;
int fd;
client = sp_writer_accept_client (priv->writer);
if (client == NULL)
goto out;
/* Start listening on this socket.
* This socket is used for the actual shm data transfer signaling
* of an individual client. So when this socket is closed, the
* client associated with this particular socket has disconnected */
pair = g_slice_new0 (ShmWriterClientPair);
pair->self = data;
pair->client = client;
fd = sp_writer_get_client_fd (client);
shm_writer_add_fd_source (data, fd, shm_writer_client_fd_cb,
pair, (GDestroyNotify)shm_writer_client_pair_free);
}
else if (condition & (G_IO_ERR | G_IO_HUP | G_IO_NVAL))
{
goto out;
}
return TRUE;
out:
shm_writer_close (data);
/* No need to destroy the source when the writer is destroyed.
* We're destroying it here */
g_object_weak_unref (G_OBJECT (data),
shm_writer_destroy_source, g_main_current_source ());
return FALSE;
}
static gpointer
pollthread_func (gpointer data)
{
GstShmSink *self = GST_SHM_SINK (data);
GList *item;
GstClockTime timeout = GST_CLOCK_TIME_NONE;
int rv = 0;
while (!self->stop) {
do {
rv = gst_poll_wait (self->poll, timeout);
} while (rv < 0 && errno == EINTR);
if (rv < 0) {
GST_ELEMENT_ERROR (self, RESOURCE, READ,
("Failed waiting on fd activity"),
("gst_poll_wait returned %d, errno: %d", rv, errno));
return NULL;
}
timeout = GST_CLOCK_TIME_NONE;
if (self->stop)
return NULL;
if (gst_poll_fd_has_closed (self->poll, &self->serverpollfd)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed read from shmsink"),
("Control socket has closed"));
return NULL;
}
if (gst_poll_fd_has_error (self->poll, &self->serverpollfd)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"),
("Control socket has error"));
return NULL;
}
if (gst_poll_fd_can_read (self->poll, &self->serverpollfd)) {
ShmClient *client;
struct GstShmClient *gclient;
GST_OBJECT_LOCK (self);
client = sp_writer_accept_client (self->pipe);
GST_OBJECT_UNLOCK (self);
if (!client) {
GST_ELEMENT_ERROR (self, RESOURCE, READ,
("Failed to read from shmsink"),
("Control socket returns wrong data"));
return NULL;
}
gclient = g_slice_new (struct GstShmClient);
gclient->client = client;
gst_poll_fd_init (&gclient->pollfd);
gclient->pollfd.fd = sp_writer_get_client_fd (client);
gst_poll_add_fd (self->poll, &gclient->pollfd);
gst_poll_fd_ctl_read (self->poll, &gclient->pollfd, TRUE);
self->clients = g_list_prepend (self->clients, gclient);
g_signal_emit (self, signals[SIGNAL_CLIENT_CONNECTED], 0,
gclient->pollfd.fd);
/* we need to call gst_poll_wait before calling gst_poll_* status
functions on that new descriptor, so restart the loop, so _wait
will have been called on all elements of self->poll, whether
they have just been added or not. */
timeout = 0;
continue;
}
again:
for (item = self->clients; item; item = item->next) {
struct GstShmClient *gclient = item->data;
if (gst_poll_fd_has_closed (self->poll, &gclient->pollfd)) {
GST_WARNING_OBJECT (self, "One client is gone, closing");
goto close_client;
}
if (gst_poll_fd_has_error (self->poll, &gclient->pollfd)) {
GST_WARNING_OBJECT (self, "One client fd has error, closing");
goto close_client;
}
if (gst_poll_fd_can_read (self->poll, &gclient->pollfd)) {
int rv;
gpointer tag = NULL;
GST_OBJECT_LOCK (self);
rv = sp_writer_recv (self->pipe, gclient->client, &tag);
GST_OBJECT_UNLOCK (self);
if (rv < 0) {
GST_WARNING_OBJECT (self, "One client has read error,"
" closing (retval: %d errno: %d)", rv, errno);
goto close_client;
}
g_assert (rv == 0 || tag == NULL);
if (rv == 0)
gst_buffer_unref (tag);
}
continue;
close_client:
{
GSList *list = NULL;
GST_OBJECT_LOCK (self);
sp_writer_close_client (self->pipe, gclient->client,
(sp_buffer_free_callback) free_buffer_locked, (void **) &list);
GST_OBJECT_UNLOCK (self);
g_slist_free_full (list, (GDestroyNotify) gst_buffer_unref);
}
gst_poll_remove_fd (self->poll, &gclient->pollfd);
self->clients = g_list_remove (self->clients, gclient);
g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0,
gclient->pollfd.fd);
g_slice_free (struct GstShmClient, gclient);
goto again;
}
g_cond_broadcast (&self->cond);
}
static gpointer
pollthread_func (gpointer data)
{
GstShmSink *self = GST_SHM_SINK (data);
GList *item;
while (!self->stop) {
if (gst_poll_wait (self->poll, GST_CLOCK_TIME_NONE) < 0)
return NULL;
if (self->stop)
return NULL;
if (gst_poll_fd_has_closed (self->poll, &self->serverpollfd)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed read from shmsink"),
("Control socket has closed"));
return NULL;
}
if (gst_poll_fd_has_error (self->poll, &self->serverpollfd)) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Failed to read from shmsink"),
("Control socket has error"));
return NULL;
}
if (gst_poll_fd_can_read (self->poll, &self->serverpollfd)) {
ShmClient *client;
struct GstShmClient *gclient;
GST_OBJECT_LOCK (self);
client = sp_writer_accept_client (self->pipe);
GST_OBJECT_UNLOCK (self);
if (!client) {
GST_ELEMENT_ERROR (self, RESOURCE, READ,
("Failed to read from shmsink"),
("Control socket returns wrong data"));
return NULL;
}
gclient = g_slice_new (struct GstShmClient);
gclient->client = client;
gst_poll_fd_init (&gclient->pollfd);
gclient->pollfd.fd = sp_writer_get_client_fd (client);
gst_poll_add_fd (self->poll, &gclient->pollfd);
gst_poll_fd_ctl_read (self->poll, &gclient->pollfd, TRUE);
self->clients = g_list_prepend (self->clients, gclient);
g_signal_emit (self, signals[SIGNAL_CLIENT_CONNECTED], 0,
gclient->pollfd.fd);
}
again:
for (item = self->clients; item; item = item->next) {
struct GstShmClient *gclient = item->data;
if (gst_poll_fd_has_closed (self->poll, &gclient->pollfd)) {
GST_WARNING_OBJECT (self, "One client is gone, closing");
goto close_client;
}
if (gst_poll_fd_has_error (self->poll, &gclient->pollfd)) {
GST_WARNING_OBJECT (self, "One client fd has error, closing");
goto close_client;
}
if (gst_poll_fd_can_read (self->poll, &gclient->pollfd)) {
int rv;
GST_OBJECT_LOCK (self);
rv = sp_writer_recv (self->pipe, gclient->client);
GST_OBJECT_UNLOCK (self);
if (rv < 0) {
GST_WARNING_OBJECT (self, "One client has read error,"
" closing (retval: %d errno: %d)", rv, errno);
goto close_client;
}
}
continue;
close_client:
GST_OBJECT_LOCK (self);
sp_writer_close_client (self->pipe, gclient->client);
GST_OBJECT_UNLOCK (self);
gst_poll_remove_fd (self->poll, &gclient->pollfd);
self->clients = g_list_remove (self->clients, gclient);
g_signal_emit (self, signals[SIGNAL_CLIENT_DISCONNECTED], 0,
gclient->pollfd.fd);
g_slice_free (struct GstShmClient, gclient);
goto again;
}
g_cond_broadcast (self->cond);
}