Add new triggering framework.

[libsigrok.git] / session.c

diff --git a/session.c b/session.c
index 0540942f5f53ea053391e495595505f255a9a77a..742619a684272115729d428679794ce7b62c672c 100644 (file)
--- a/session.c
+++ b/session.c
@@ -292,6 +292,18 @@ SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback cb, void *cb_da
        return SR_OK;
 }
 
+SR_PRIV struct sr_trigger *sr_session_trigger_get(void)
+{
+       return session->trigger;
+}
+
+SR_API int sr_session_trigger_set(struct sr_trigger *trig)
+{
+       session->trigger = trig;
+
+       return SR_OK;
+}
+
 /**
  * Call every device in the session's callback.
  *
@@ -347,6 +359,42 @@ static int sr_session_iteration(gboolean block)
        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.
  *
@@ -375,6 +423,9 @@ SR_API int sr_session_start(void)
                return SR_ERR_BUG;
        }
 
+       if (session->trigger && verify_trigger(session->trigger) != SR_OK)
+               return SR_ERR;
+
        sr_info("Starting.");
 
        ret = SR_OK;