static gpointer
gst_curl_base_sink_transfer_thread_func (gpointer data)
{
GstCurlBaseSink *sink = (GstCurlBaseSink *) data;
GstCurlBaseSinkClass *klass = GST_CURL_BASE_SINK_GET_CLASS (sink);
GstFlowReturn ret;
gboolean data_available;
GST_LOG ("transfer thread started");
GST_OBJECT_LOCK (sink);
if (!gst_curl_base_sink_transfer_setup_unlocked (sink)) {
/* no need to set sink->error, as it is set by the called function */
sink->flow_ret = GST_FLOW_ERROR;
goto done;
}
while (!sink->transfer_thread_close && sink->flow_ret == GST_FLOW_OK) {
/* we are working on a new file, clearing flag and setting a new file
* name */
sink->new_file = FALSE;
/* wait for data to arrive for this new file, if we get a new file name
* again before getting data we will simply skip transferring anything
* for this file and go directly to the new file */
data_available = gst_curl_base_sink_wait_for_data_unlocked (sink);
if (data_available) {
if (G_UNLIKELY (!klass->set_protocol_dynamic_options_unlocked (sink))) {
sink->error = g_strdup ("unexpected state");
sink->flow_ret = GST_FLOW_ERROR;
goto done;
}
}
/* stay unlocked while handling the actual transfer */
GST_OBJECT_UNLOCK (sink);
if (data_available) {
GST_LOG ("have data");
if (!gst_curl_base_sink_is_live (sink)) {
/* prepare transfer if needed */
if (klass->prepare_transfer) {
GST_OBJECT_LOCK (sink);
if (!klass->prepare_transfer (sink)) {
sink->flow_ret = GST_FLOW_ERROR;
goto done;
}
GST_OBJECT_UNLOCK (sink);
}
GST_LOG ("adding handle");
curl_multi_add_handle (sink->multi_handle, sink->curl);
}
/* Start driving the transfer. */
klass->handle_transfer (sink);
/* easy handle will be possibly re-used for next transfer, thus it needs
* to be removed from the multi stack and re-added again */
if (!gst_curl_base_sink_is_live (sink)) {
GST_LOG ("removing handle");
curl_multi_remove_handle (sink->multi_handle, sink->curl);
}
} else {
GST_LOG ("have no data yet");
}
/* lock again before looping to check the thread closed flag */
GST_OBJECT_LOCK (sink);
}
if (sink->is_live) {
GST_LOG ("removing handle");
curl_multi_remove_handle (sink->multi_handle, sink->curl);
}
done:
/* extract the error code so the lock does not have to be
* taken when calling the functions below that take the lock
* on their own */
ret = sink->flow_ret;
GST_OBJECT_UNLOCK (sink);
/* if there is a flow error, always notify the render function so it
* can return the flow error up along the pipeline. as an error has
* occurred there is no response to receive, so notify the event function
* so it doesn't block indefinitely waiting for a response. */
if (ret != GST_FLOW_OK) {
gst_curl_base_sink_data_sent_notify (sink);
gst_curl_base_sink_got_response_notify (sink);
}
GST_DEBUG ("exit thread func - transfer thread close flag: %d",
sink->transfer_thread_close);
return NULL;
}
static void
handle_transfer (GstCurlBaseSink * sink)
{
GstCurlBaseSinkClass *klass = GST_CURL_BASE_SINK_GET_CLASS (sink);
gint retval;
gint activated_fds;
gint running_handles;
gint timeout;
CURLMcode m_code;
CURLcode e_code;
GST_OBJECT_LOCK (sink);
timeout = sink->timeout;
GST_OBJECT_UNLOCK (sink);
GST_DEBUG_OBJECT (sink, "handling transfers");
/* Receiving CURLM_CALL_MULTI_PERFORM means that libcurl may have more data
available to send or receive - call simply curl_multi_perform before
poll() on more actions */
do {
m_code = curl_multi_perform (sink->multi_handle, &running_handles);
} while (m_code == CURLM_CALL_MULTI_PERFORM);
GST_DEBUG_OBJECT (sink, "running handles: %d", running_handles);
while (running_handles && (m_code == CURLM_OK)) {
if (klass->transfer_prepare_poll_wait) {
klass->transfer_prepare_poll_wait (sink);
}
activated_fds = gst_poll_wait (sink->fdset, timeout * GST_SECOND);
if (G_UNLIKELY (activated_fds == -1)) {
if (errno == EAGAIN || errno == EINTR) {
GST_DEBUG_OBJECT (sink, "interrupted by signal");
} else if (errno == EBUSY) {
GST_DEBUG_OBJECT (sink, "poll stopped");
retval = GST_FLOW_EOS;
GST_OBJECT_LOCK (sink);
if (gst_curl_base_sink_has_buffered_data_unlocked (sink))
GST_WARNING_OBJECT (sink,
"discarding render data due to thread close flag");
GST_OBJECT_UNLOCK (sink);
goto fail;
} else {
sink->error = g_strdup_printf ("poll failed: %s", g_strerror (errno));
retval = GST_FLOW_ERROR;
goto fail;
}
} else if (G_UNLIKELY (activated_fds == 0)) {
sink->error = g_strdup_printf ("poll timed out after %" GST_TIME_FORMAT,
GST_TIME_ARGS (timeout * GST_SECOND));
retval = GST_FLOW_ERROR;
goto fail;
}
/* readable/writable sockets */
do {
m_code = curl_multi_perform (sink->multi_handle, &running_handles);
} while (m_code == CURLM_CALL_MULTI_PERFORM);
GST_DEBUG_OBJECT (sink, "running handles: %d", running_handles);
}
if (m_code != CURLM_OK) {
sink->error = g_strdup_printf ("failed to write data: %s",
curl_multi_strerror (m_code));
retval = GST_FLOW_ERROR;
goto fail;
}
/* problems still might have occurred on individual transfers even when
* curl_multi_perform returns CURLM_OK */
if ((e_code = gst_curl_base_sink_transfer_check (sink)) != CURLE_OK) {
sink->error = g_strdup_printf ("failed to transfer data: %s",
curl_easy_strerror (e_code));
retval = GST_FLOW_ERROR;
goto fail;
}
gst_curl_base_sink_got_response_notify (sink);
GST_OBJECT_LOCK (sink);
if (sink->socket_type == CURLSOCKTYPE_ACCEPT) {
/* FIXME: remove this again once we can depend on libcurl > 7.44.0,
* see https://github.com/bagder/curl/issues/405.
*/
if (G_UNLIKELY (sink->fd.fd < 0)) {
sink->error = g_strdup_printf ("unknown error");
retval = GST_FLOW_ERROR;
GST_OBJECT_UNLOCK (sink);
goto fail;
}
if (!gst_poll_remove_fd (sink->fdset, &sink->fd)) {
sink->error = g_strdup_printf ("failed to remove fd");
retval = GST_FLOW_ERROR;
GST_OBJECT_UNLOCK (sink);
goto fail;
}
sink->fd.fd = -1;
}
GST_OBJECT_UNLOCK (sink);
return;
fail:
GST_OBJECT_LOCK (sink);
if (sink->flow_ret == GST_FLOW_OK) {
sink->flow_ret = retval;
}
GST_OBJECT_UNLOCK (sink);
return;
}
static void
handle_transfer (GstCurlBaseSink * sink)
{
GstCurlBaseSinkClass *klass = GST_CURL_BASE_SINK_GET_CLASS (sink);
gint retval;
gint activated_fds;
gint running_handles;
gint timeout;
CURLMcode m_code;
CURLcode e_code;
GST_OBJECT_LOCK (sink);
timeout = sink->timeout;
GST_OBJECT_UNLOCK (sink);
/* Receiving CURLM_CALL_MULTI_PERFORM means that libcurl may have more data
available to send or receive - call simply curl_multi_perform before
poll() on more actions */
do {
m_code = curl_multi_perform (sink->multi_handle, &running_handles);
} while (m_code == CURLM_CALL_MULTI_PERFORM);
while (running_handles && (m_code == CURLM_OK)) {
if (klass->transfer_prepare_poll_wait) {
klass->transfer_prepare_poll_wait (sink);
}
activated_fds = gst_poll_wait (sink->fdset, timeout * GST_SECOND);
if (G_UNLIKELY (activated_fds == -1)) {
if (errno == EAGAIN || errno == EINTR) {
GST_DEBUG_OBJECT (sink, "interrupted by signal");
} else if (errno == EBUSY) {
GST_DEBUG_OBJECT (sink, "poll stopped");
retval = GST_FLOW_EOS;
goto fail;
} else {
GST_DEBUG_OBJECT (sink, "poll failed: %s", g_strerror (errno));
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, ("poll failed"), (NULL));
retval = GST_FLOW_ERROR;
goto fail;
}
} else if (G_UNLIKELY (activated_fds == 0)) {
GST_DEBUG_OBJECT (sink, "poll timed out");
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, ("poll timed out"), (NULL));
retval = GST_FLOW_ERROR;
goto fail;
}
/* readable/writable sockets */
do {
m_code = curl_multi_perform (sink->multi_handle, &running_handles);
} while (m_code == CURLM_CALL_MULTI_PERFORM);
}
if (m_code != CURLM_OK) {
GST_DEBUG_OBJECT (sink, "curl multi error");
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, ("%s",
curl_multi_strerror (m_code)), (NULL));
retval = GST_FLOW_ERROR;
goto fail;
}
/* problems still might have occurred on individual transfers even when
* curl_multi_perform returns CURLM_OK */
if ((e_code = gst_curl_base_sink_transfer_check (sink)) != CURLE_OK) {
GST_DEBUG_OBJECT (sink, "curl easy error");
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE, ("%s",
curl_easy_strerror (e_code)), (NULL));
retval = GST_FLOW_ERROR;
goto fail;
}
gst_curl_base_sink_got_response_notify (sink);
return;
fail:
GST_OBJECT_LOCK (sink);
if (sink->flow_ret == GST_FLOW_OK) {
sink->flow_ret = retval;
}
GST_OBJECT_UNLOCK (sink);
return;
}
