* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <glib.h>
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
#include "libsigrok-internal.h"
/** @cond PRIVATE */
/**
* Create a new session.
*
+ * @param ctx The context in which to create the new session.
* @param new_session This will contain a pointer to the newly created
* session if the return value is SR_OK, otherwise the value
* is undefined and should not be used. Must not be NULL.
*
* @since 0.4.0
*/
-SR_API int sr_session_new(struct sr_session **new_session)
+SR_API int sr_session_new(struct sr_context *ctx,
+ struct sr_session **new_session)
{
struct sr_session *session;
session = g_malloc0(sizeof(struct sr_session));
+ session->ctx = ctx;
session->source_timeout = -1;
session->running = FALSE;
session->abort_session = FALSE;
return SR_OK;
}
+static gboolean sr_session_check_aborted(struct sr_session *session)
+{
+ gboolean stop;
+
+ g_mutex_lock(&session->stop_mutex);
+ stop = session->abort_session;
+ if (stop) {
+ sr_session_stop_sync(session);
+ /* But once is enough. */
+ session->abort_session = FALSE;
+ }
+ g_mutex_unlock(&session->stop_mutex);
+
+ return stop;
+}
+
/**
* Call every device in the current session's callback.
*
* sources to fire an event on the file descriptors, or
* any of their timeouts to activate. In other words, this
* can be used as a select loop.
- * If FALSE, all sources have their callback run, regardless
- * of file descriptor or timeout status.
- *
+ * If FALSE, return immediately if none of the sources has
+ * events pending.
* @retval SR_OK Success.
- * @retval SR_ERR Error occured.
+ * @retval SR_ERR Error occurred.
*/
static int sr_session_iteration(struct sr_session *session, gboolean block)
{
unsigned int i;
- int ret;
+ int ret, timeout;
+ int revents;
+ gboolean stop_checked;
+ gboolean stopped;
+ struct source *source;
+ GPollFD *pollfd;
+#ifdef HAVE_LIBUSB_1_0
+ int usb_timeout;
+ struct timeval tv;
+#endif
+
+ timeout = block ? session->source_timeout : 0;
+
+#ifdef HAVE_LIBUSB_1_0
+ if (session->ctx->usb_source_present) {
+ ret = libusb_get_next_timeout(session->ctx->libusb_ctx, &tv);
+ if (ret < 0) {
+ sr_err("Error getting libusb timeout: %s",
+ libusb_error_name(ret));
+ return SR_ERR;
+ } else if (ret == 1) {
+ usb_timeout = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+ timeout = MIN(timeout, usb_timeout);
+ }
+ }
+#endif
+
+ ret = g_poll(session->pollfds, session->num_sources, timeout);
+#ifdef G_OS_UNIX
+ if (ret < 0 && errno != EINTR) {
+ sr_err("Error in poll: %s", g_strerror(errno));
+ return SR_ERR;
+ }
+#else
+ if (ret < 0) {
+ sr_err("Error in poll: %d", ret);
+ return SR_ERR;
+ }
+#endif
+ stop_checked = FALSE;
+ stopped = FALSE;
- ret = g_poll(session->pollfds, session->num_sources,
- block ? session->source_timeout : 0);
for (i = 0; i < session->num_sources; i++) {
- if (session->pollfds[i].revents > 0 || (ret == 0
- && session->source_timeout == session->sources[i].timeout)) {
+ source = &session->sources[i];
+ pollfd = &session->pollfds[i];
+ revents = (ret > 0) ? pollfd->revents : 0;
+
+ if (revents > 0 || (ret == 0
+ && session->source_timeout == source->timeout)) {
/*
* Invoke the source's callback on an event,
* or if the poll timed out and this source
* asked for that timeout.
*/
- if (!session->sources[i].cb(session->pollfds[i].fd,
- session->pollfds[i].revents,
- session->sources[i].cb_data))
+ if (!source->cb(pollfd->fd, revents, source->cb_data))
sr_session_source_remove(session,
- session->sources[i].poll_object);
- }
- /*
- * We want to take as little time as possible to stop
- * the session if we have been told to do so. Therefore,
- * we check the flag after processing every source, not
- * just once per main event loop.
- */
- g_mutex_lock(&session->stop_mutex);
- if (session->abort_session) {
- sr_session_stop_sync(session);
- /* But once is enough. */
- session->abort_session = FALSE;
+ source->poll_object);
+ /*
+ * We want to take as little time as possible to stop
+ * the session if we have been told to do so. Therefore,
+ * we check the flag after processing every source, not
+ * just once per main event loop.
+ */
+ if (!stopped) {
+ stopped = sr_session_check_aborted(session);
+ stop_checked = TRUE;
+ }
}
- g_mutex_unlock(&session->stop_mutex);
}
+ if (!stop_checked)
+ sr_session_check_aborted(session);
return SR_OK;
}
return SR_OK;
}
+
/**
* Start a session.
*
const struct sr_datafeed_analog *analog;
const struct sr_datafeed_analog2 *analog2;
+ /* Please use the same order as in libsigrok.h. */
switch (packet->type) {
case SR_DF_HEADER:
sr_dbg("bus: Received SR_DF_HEADER packet.");
break;
- case SR_DF_TRIGGER:
- sr_dbg("bus: Received SR_DF_TRIGGER packet.");
+ case SR_DF_END:
+ sr_dbg("bus: Received SR_DF_END packet.");
break;
case SR_DF_META:
sr_dbg("bus: Received SR_DF_META packet.");
break;
+ case SR_DF_TRIGGER:
+ sr_dbg("bus: Received SR_DF_TRIGGER packet.");
+ break;
case SR_DF_LOGIC:
logic = packet->payload;
sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes, "
sr_dbg("bus: Received SR_DF_ANALOG packet (%d samples).",
analog->num_samples);
break;
- case SR_DF_ANALOG2:
- analog2 = packet->payload;
- sr_dbg("bus: Received SR_DF_ANALOG2 packet (%d samples).",
- analog2->num_samples);
- break;
- case SR_DF_END:
- sr_dbg("bus: Received SR_DF_END packet.");
- break;
case SR_DF_FRAME_BEGIN:
sr_dbg("bus: Received SR_DF_FRAME_BEGIN packet.");
break;
case SR_DF_FRAME_END:
sr_dbg("bus: Received SR_DF_FRAME_END packet.");
break;
+ case SR_DF_ANALOG2:
+ analog2 = packet->payload;
+ sr_dbg("bus: Received SR_DF_ANALOG2 packet (%d samples).",
+ analog2->num_samples);
+ break;
default:
sr_dbg("bus: Received unknown packet type: %d.", packet->type);
break;
{
GSList *l;
struct datafeed_callback *cb_struct;
+ struct sr_datafeed_packet *packet_in, *packet_out;
+ struct sr_transform *t;
+ int ret;
if (!sdi) {
sr_err("%s: sdi was NULL", __func__);
return SR_ERR_BUG;
}
+ /*
+ * Pass the packet to the first transform module. If that returns
+ * another packet (instead of NULL), pass that packet to the next
+ * transform module in the list, and so on.
+ */
+ packet_in = (struct sr_datafeed_packet *)packet;
+ for (l = sdi->session->transforms; l; l = l->next) {
+ t = l->data;
+ sr_spew("Running transform module '%s'.", t->module->id);
+ ret = t->module->receive(t, packet_in, &packet_out);
+ if (ret < 0) {
+ sr_err("Error while running transform module: %d.", ret);
+ return SR_ERR;
+ }
+ if (!packet_out) {
+ /*
+ * If any of the transforms don't return an output
+ * packet, abort.
+ */
+ sr_spew("Transform module didn't return a packet, aborting.");
+ return SR_OK;
+ } else {
+ /*
+ * Use this transform module's output packet as input
+ * for the next transform module.
+ */
+ packet_in = packet_out;
+ }
+ }
+ packet = packet_in;
+
+ /*
+ * If the last transform did output a packet, pass it to all datafeed
+ * callbacks.
+ */
for (l = sdi->session->datafeed_callbacks; l; l = l->next) {
if (sr_log_loglevel_get() >= SR_LOG_DBG)
datafeed_dump(packet);
p.fd = fd;
p.events = events;
+ p.revents = 0;
return _sr_session_source_add(session, &p, timeout, cb, cb_data, (gintptr)fd);
}
#else
p.fd = g_io_channel_unix_get_fd(channel);
p.events = events;
+ p.revents = 0;
#endif
return _sr_session_source_add(session, &p, timeout, cb, cb_data, (gintptr)channel);
return _sr_session_source_remove(session, (gintptr)channel);
}
-static void *copy_src(struct sr_config *src)
+static void copy_src(struct sr_config *src, struct sr_datafeed_meta *meta_copy)
{
- struct sr_config *new_src;
-
- new_src = g_malloc(sizeof(struct sr_config));
- memcpy(new_src, src, sizeof(struct sr_config));
g_variant_ref(src->data);
-
- return new_src;
+ meta_copy->config = g_slist_append(meta_copy->config,
+ g_memdup(src, sizeof(struct sr_config)));
}
SR_PRIV int sr_packet_copy(const struct sr_datafeed_packet *packet,
break;
case SR_DF_META:
meta = packet->payload;
- meta_copy = g_malloc(sizeof(struct sr_datafeed_meta));
- meta_copy->config = g_slist_copy_deep(meta->config,
- (GCopyFunc)copy_src, NULL);
+ meta_copy = g_malloc0(sizeof(struct sr_datafeed_meta));
+ g_slist_foreach(meta->config, (GFunc)copy_src, meta_copy->config);
(*copy)->payload = meta_copy;
break;
case SR_DF_LOGIC:
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