#include "libsigrok.h"
#include "libsigrok-internal.h"
+/** @cond PRIVATE */
#define LOG_PREFIX "session"
+/** @endcond */
/**
* @file
struct source {
int timeout;
- sr_receive_data_callback_t cb;
+ sr_receive_data_callback cb;
void *cb_data;
/* This is used to keep track of the object (fd, pollfd or channel) which is
};
struct datafeed_callback {
- sr_datafeed_callback_t cb;
+ sr_datafeed_callback cb;
void *cb_data;
};
-/* There can only be one session at a time. */
-/* 'session' is not static, it's used elsewhere (via 'extern'). */
-struct sr_session *session;
+/* There can currently only be one session at a time. */
+/* 'sr_current_session' is not static, it's used elsewhere (via 'extern'). */
+struct sr_session *sr_current_session;
/**
* Create a new session.
+ * Currently, there can be only one session at a time within the same process.
*
- * @todo Should it use the file-global "session" variable or take an argument?
- * The same question applies to all the other session functions.
+ * @retval SR_OK Success.
+ * @retval SR_ERR_BUG A session exists already.
*
- * @retval NULL Error.
- * @retval other A pointer to the newly allocated session.
+ * @since 0.4.0
*/
-SR_API struct sr_session *sr_session_new(void)
+SR_API int sr_session_new(struct sr_session **session)
{
- if (!(session = g_try_malloc0(sizeof(struct sr_session)))) {
- sr_err("Session malloc failed.");
- return NULL;
+ if (sr_current_session) {
+ sr_err("%s: session already exists", __func__);
+ return SR_ERR_BUG;
}
- session->source_timeout = -1;
- session->running = FALSE;
- session->abort_session = FALSE;
- g_mutex_init(&session->stop_mutex);
+ sr_current_session = g_malloc0(sizeof(struct sr_session));
- return session;
+ sr_current_session->source_timeout = -1;
+ sr_current_session->running = FALSE;
+ sr_current_session->abort_session = FALSE;
+ g_mutex_init(&sr_current_session->stop_mutex);
+
+ *session = sr_current_session;
+
+ return SR_OK;
}
/**
- * Destroy the current session.
+ * Destroy a session.
* This frees up all memory used by the session.
*
* @retval SR_OK Success.
- * @retval SR_ERR_BUG No session exists.
+ * @retval SR_ERR_ARG Invalid session passed.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_destroy(void)
+SR_API int sr_session_destroy(struct sr_session *session)
{
if (!session) {
sr_err("%s: session was NULL", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
}
- sr_session_dev_remove_all();
-
- /* TODO: Error checks needed? */
-
+ sr_session_dev_remove_all(session);
g_mutex_clear(&session->stop_mutex);
+ if (session->trigger)
+ sr_trigger_free(session->trigger);
g_free(session);
- session = NULL;
+
+ if (session == sr_current_session)
+ sr_current_session = NULL;
return SR_OK;
}
/**
- * Remove all the devices from the current session.
+ * Remove all the devices from a session.
*
* The session itself (i.e., the struct sr_session) is not free'd and still
* exists after this function returns.
*
* @retval SR_OK Success.
- * @retval SR_ERR_BUG No session exists.
+ * @retval SR_ERR_BUG Invalid session passed.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_dev_remove_all(void)
+SR_API int sr_session_dev_remove_all(struct sr_session *session)
{
+ struct sr_dev_inst *sdi;
+ GSList *l;
+
if (!session) {
sr_err("%s: session was NULL", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
+ }
+
+ for (l = session->devs; l; l = l->next) {
+ sdi = (struct sr_dev_inst *) l->data;
+ sdi->session = NULL;
}
g_slist_free(session->devs);
}
/**
- * Add a device instance to the current session.
+ * Add a device instance to a session.
*
- * @param sdi The device instance to add to the current session. Must not
+ * @param sdi The device instance to add to a session. Must not
* be NULL. Also, sdi->driver and sdi->driver->dev_open must
* not be NULL.
*
* @retval SR_OK Success.
* @retval SR_ERR_ARG Invalid argument.
- * @retval SR_ERR_BUG No session exists.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_dev_add(const struct sr_dev_inst *sdi)
+SR_API int sr_session_dev_add(struct sr_session *session,
+ struct sr_dev_inst *sdi)
{
int ret;
if (!session) {
sr_err("%s: session was NULL", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
+ }
+
+ /* If sdi->session is not NULL, the device is already in this or
+ * another session. */
+ if (sdi->session) {
+ sr_err("%s: already assigned to session", __func__);
+ return SR_ERR_ARG;
}
/* If sdi->driver is NULL, this is a virtual device. */
"a virtual device; continuing", __func__);
/* Just add the device, don't run dev_open(). */
session->devs = g_slist_append(session->devs, (gpointer)sdi);
+ sdi->session = session;
return SR_OK;
}
}
session->devs = g_slist_append(session->devs, (gpointer)sdi);
+ sdi->session = session;
if (session->running) {
/* Adding a device to a running session. Commit settings
}
/**
- * List all device instances attached to the current session.
+ * List all device instances attached to a session.
*
* @param devlist A pointer where the device instance list will be
* stored on return. If no devices are in the session,
* elements pointed to.
*
* @retval SR_OK Success.
- * @retval SR_ERR Invalid argument.
+ * @retval SR_ERR_ARG Invalid argument.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_dev_list(GSList **devlist)
+SR_API int sr_session_dev_list(struct sr_session *session, GSList **devlist)
{
-
- *devlist = NULL;
-
if (!session)
- return SR_ERR;
+ return SR_ERR_ARG;
+
+ if (!devlist)
+ return SR_ERR_ARG;
*devlist = g_slist_copy(session->devs);
}
/**
- * Remove all datafeed callbacks in the current session.
+ * Remove all datafeed callbacks in a session.
*
* @retval SR_OK Success.
- * @retval SR_ERR_BUG No session exists.
+ * @retval SR_ERR_ARG Invalid session passed.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_datafeed_callback_remove_all(void)
+SR_API int sr_session_datafeed_callback_remove_all(struct sr_session *session)
{
if (!session) {
sr_err("%s: session was NULL", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
}
g_slist_free_full(session->datafeed_callbacks, g_free);
}
/**
- * Add a datafeed callback to the current session.
+ * Add a datafeed callback to a session.
*
* @param cb Function to call when a chunk of data is received.
* Must not be NULL.
*
* @retval SR_OK Success.
* @retval SR_ERR_BUG No session exists.
+ *
+ * @since 0.3.0
*/
-SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb, void *cb_data)
+SR_API int sr_session_datafeed_callback_add(struct sr_session *session,
+ sr_datafeed_callback cb, void *cb_data)
{
struct datafeed_callback *cb_struct;
return SR_OK;
}
+SR_API struct sr_trigger *sr_session_trigger_get(struct sr_session *session)
+{
+ return session->trigger;
+}
+
+SR_API int sr_session_trigger_set(struct sr_session *session, struct sr_trigger *trig)
+{
+ session->trigger = trig;
+
+ return SR_OK;
+}
+
/**
- * Call every device in the session's callback.
+ * Call every device in the current session's callback.
*
* For sessions not driven by select loops such as sr_session_run(),
* but driven by another scheduler, this can be used to poll the devices
*/
static int sr_session_iteration(gboolean block)
{
+ struct sr_session *session = sr_current_session;
unsigned int i;
int ret;
if (!session->sources[i].cb(session->pollfds[i].fd,
session->pollfds[i].revents,
session->sources[i].cb_data))
- sr_session_source_remove(session->sources[i].poll_object);
+ sr_session_source_remove(session,
+ session->sources[i].poll_object);
}
/*
* We want to take as little time as possible to stop
*/
g_mutex_lock(&session->stop_mutex);
if (session->abort_session) {
- sr_session_stop_sync();
+ sr_session_stop_sync(session);
/* But once is enough. */
session->abort_session = FALSE;
}
return SR_OK;
}
+
+static int verify_trigger(struct sr_trigger *trigger)
+{
+ struct sr_trigger_stage *stage;
+ struct sr_trigger_match *match;
+ GSList *l, *m;
+
+ if (!trigger->stages) {
+ sr_err("No trigger stages defined.");
+ return SR_ERR;
+ }
+
+ sr_spew("Checking trigger:");
+ for (l = trigger->stages; l; l = l->next) {
+ stage = l->data;
+ if (!stage->matches) {
+ sr_err("Stage %d has no matches defined.", stage->stage);
+ return SR_ERR;
+ }
+ for (m = stage->matches; m; m = m->next) {
+ match = m->data;
+ if (!match->channel) {
+ sr_err("Stage %d match has no channel.", stage->stage);
+ return SR_ERR;
+ }
+ if (!match->match) {
+ sr_err("Stage %d match is not defined.", stage->stage);
+ return SR_ERR;
+ }
+ sr_spew("Stage %d match on channel %s, match %d", stage->stage,
+ match->channel->name, match->match);
+ }
+ }
+
+ return SR_OK;
+}
/**
* Start a session.
*
- * There can only be one session at a time.
- *
* @retval SR_OK Success.
- * @retval SR_ERR Error occured.
+ * @retval SR_ERR_ARG Invalid session passed.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_start(void)
+SR_API int sr_session_start(struct sr_session *session)
{
struct sr_dev_inst *sdi;
GSList *l;
int ret;
if (!session) {
- sr_err("%s: session was NULL; a session must be "
- "created before starting it.", __func__);
- return SR_ERR_BUG;
+ sr_err("%s: session was NULL", __func__);
+ return SR_ERR_ARG;
}
if (!session->devs) {
sr_err("%s: session->devs was NULL; a session "
"cannot be started without devices.", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
}
+ if (session->trigger && verify_trigger(session->trigger) != SR_OK)
+ return SR_ERR;
+
sr_info("Starting.");
ret = SR_OK;
}
/**
- * Run the session.
+ * Run a session.
*
* @retval SR_OK Success.
- * @retval SR_ERR_BUG Error occured.
+ * @retval SR_ERR_ARG Invalid session passed.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_run(void)
+SR_API int sr_session_run(struct sr_session *session)
{
if (!session) {
- sr_err("%s: session was NULL; a session must be "
- "created first, before running it.", __func__);
- return SR_ERR_BUG;
+ sr_err("%s: session was NULL", __func__);
+ return SR_ERR_ARG;
}
if (!session->devs) {
/* TODO: Actually the case? */
sr_err("%s: session->devs was NULL; a session "
"cannot be run without devices.", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
}
session->running = TRUE;
}
/**
- * Stop the current session.
+ * Stop a session.
*
- * The current session is stopped immediately, with all acquisition sessions
- * being stopped and hardware drivers cleaned up.
+ * The session is stopped immediately, with all acquisition sessions stopped
+ * and hardware drivers cleaned up.
*
* This must be called from within the session thread, to prevent freeing
* resources that the session thread will try to use.
*
* @retval SR_OK Success.
- * @retval SR_ERR_BUG No session exists.
+ * @retval SR_ERR_ARG Invalid session passed.
*
* @private
*/
-SR_PRIV int sr_session_stop_sync(void)
+SR_PRIV int sr_session_stop_sync(struct sr_session *session)
{
struct sr_dev_inst *sdi;
GSList *l;
if (!session) {
sr_err("%s: session was NULL", __func__);
- return SR_ERR_BUG;
+ return SR_ERR_ARG;
}
sr_info("Stopping.");
}
/**
- * Stop the current session.
+ * Stop a session.
*
- * The current session is stopped immediately, with all acquisition sessions
- * being stopped and hardware drivers cleaned up.
+ * The session is stopped immediately, with all acquisition sessions being
+ * stopped and hardware drivers cleaned up.
*
* If the session is run in a separate thread, this function will not block
* until the session is finished executing. It is the caller's responsibility
* completely decommissioned.
*
* @retval SR_OK Success.
- * @retval SR_ERR_BUG No session exists.
+ * @retval SR_ERR_ARG Invalid session passed.
+ *
+ * @since 0.4.0
*/
-SR_API int sr_session_stop(void)
+SR_API int sr_session_stop(struct sr_session *session)
{
if (!session) {
sr_err("%s: session was NULL", __func__);
break;
case SR_DF_LOGIC:
logic = packet->payload;
- sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes).",
- logic->length);
+ sr_dbg("bus: Received SR_DF_LOGIC packet (%" PRIu64 " bytes, "
+ "unitsize = %d).", logic->length, logic->unitsize);
break;
case SR_DF_ANALOG:
analog = packet->payload;
return SR_ERR_ARG;
}
- for (l = session->datafeed_callbacks; l; l = l->next) {
+ for (l = sr_current_session->datafeed_callbacks; l; l = l->next) {
if (sr_log_loglevel_get() >= SR_LOG_DBG)
datafeed_dump(packet);
cb_struct = l->data;
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR_MALLOC Memory allocation error.
*/
-static int _sr_session_source_add(GPollFD *pollfd, int timeout,
- sr_receive_data_callback_t cb, void *cb_data, gintptr poll_object)
+static int _sr_session_source_add(struct sr_session *session, GPollFD *pollfd,
+ int timeout, sr_receive_data_callback cb, void *cb_data, gintptr poll_object)
{
struct source *new_sources, *s;
GPollFD *new_pollfds;
* @retval SR_OK Success.
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR_MALLOC Memory allocation error.
+ *
+ * @since 0.3.0
*/
-SR_API int sr_session_source_add(int fd, int events, int timeout,
- sr_receive_data_callback_t cb, void *cb_data)
+SR_API int sr_session_source_add(struct sr_session *session, int fd,
+ int events, int timeout, sr_receive_data_callback cb, void *cb_data)
{
GPollFD p;
+ (void) session;
+
p.fd = fd;
p.events = events;
- return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)fd);
+ return _sr_session_source_add(session, &p, timeout, cb, cb_data, (gintptr)fd);
}
/**
* @retval SR_OK Success.
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR_MALLOC Memory allocation error.
+ *
+ * @since 0.3.0
*/
-SR_API int sr_session_source_add_pollfd(GPollFD *pollfd, int timeout,
- sr_receive_data_callback_t cb, void *cb_data)
+SR_API int sr_session_source_add_pollfd(struct sr_session *session,
+ GPollFD *pollfd, int timeout, sr_receive_data_callback cb,
+ void *cb_data)
{
- return _sr_session_source_add(pollfd, timeout, cb,
+ (void) session;
+
+ return _sr_session_source_add(session, pollfd, timeout, cb,
cb_data, (gintptr)pollfd);
}
* @retval SR_OK Success.
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR_MALLOC Memory allocation error.
+ *
+ * @since 0.3.0
*/
-SR_API int sr_session_source_add_channel(GIOChannel *channel, int events,
- int timeout, sr_receive_data_callback_t cb, void *cb_data)
+SR_API int sr_session_source_add_channel(struct sr_session *session,
+ GIOChannel *channel, int events, int timeout,
+ sr_receive_data_callback cb, void *cb_data)
{
GPollFD p;
+ (void) session;
+
#ifdef _WIN32
g_io_channel_win32_make_pollfd(channel, events, &p);
#else
p.events = events;
#endif
- return _sr_session_source_add(&p, timeout, cb, cb_data, (gintptr)channel);
+ return _sr_session_source_add(session, &p, timeout, cb, cb_data, (gintptr)channel);
}
/**
* @retval SR_ERR_MALLOC Memory allocation error
* @retval SR_ERR_BUG Internal error
*/
-static int _sr_session_source_remove(gintptr poll_object)
+static int _sr_session_source_remove(struct sr_session *session, gintptr poll_object)
{
struct source *new_sources;
GPollFD *new_pollfds;
* @retval SR_ERR_ARG Invalid argument
* @retval SR_ERR_MALLOC Memory allocation error.
* @retval SR_ERR_BUG Internal error.
+ *
+ * @since 0.3.0
*/
-SR_API int sr_session_source_remove(int fd)
+SR_API int sr_session_source_remove(struct sr_session *session, int fd)
{
- return _sr_session_source_remove((gintptr)fd);
+ (void) session;
+
+ return _sr_session_source_remove(session, (gintptr)fd);
}
/**
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
* SR_ERR_MALLOC upon memory allocation errors, SR_ERR_BUG upon
* internal errors.
+ *
+ * @since 0.2.0
*/
-SR_API int sr_session_source_remove_pollfd(GPollFD *pollfd)
+SR_API int sr_session_source_remove_pollfd(struct sr_session *session,
+ GPollFD *pollfd)
{
- return _sr_session_source_remove((gintptr)pollfd);
+ (void) session;
+
+ return _sr_session_source_remove(session, (gintptr)pollfd);
}
/**
* @retval SR_ERR_ARG Invalid argument.
* @retval SR_ERR_MALLOC Memory allocation error.
* @return SR_ERR_BUG Internal error.
+ *
+ * @since 0.2.0
*/
-SR_API int sr_session_source_remove_channel(GIOChannel *channel)
+SR_API int sr_session_source_remove_channel(struct sr_session *session,
+ GIOChannel *channel)
{
- return _sr_session_source_remove((gintptr)channel);
+ (void) session;
+
+ return _sr_session_source_remove(session, (gintptr)channel);
}
/** @} */
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