From: Bert Vermeulen <redacted>
Date: Mon, 15 Jul 2013 12:14:28 +0000 (+0200)
Subject: Add sr_session_iteration() API function
X-Git-Tag: libsigrok-0.2.1~29
X-Git-Url: https://sigrok.org/gitweb/?a=commitdiff_plain;h=b483be7456fbc2e29efa50a49f6e8d60a8107527;p=libsigrok.git

Add sr_session_iteration() API function
---

diff --git a/proto.h b/proto.h
index 821846f2..b1adb35f 100644
--- a/proto.h
+++ b/proto.h
@@ -97,6 +97,7 @@ SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb,
 		void *cb_data);
 
 /* Session control */
+SR_API int sr_session_iteration(gboolean block);
 SR_API int sr_session_start(void);
 SR_API int sr_session_run(void);
 SR_API int sr_session_stop(void);
diff --git a/session.c b/session.c
index 4fa5dafe..720b5ae1 100644
--- a/session.c
+++ b/session.c
@@ -232,41 +232,48 @@ SR_API int sr_session_datafeed_callback_add(sr_datafeed_callback_t cb, void *cb_
 	return SR_OK;
 }
 
-static int sr_session_run_poll(void)
+/**
+ * Call every device in the 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
+ * from within that scheduler.
+ *
+ * @return SR_OK upon success, SR_ERR on errors.
+ */
+SR_API int sr_session_iteration(gboolean block)
 {
 	unsigned int i;
 	int ret;
 
-	while (session->num_sources > 0) {
-		ret = g_poll(session->pollfds, session->num_sources,
-				session->source_timeout);
-		for (i = 0; i < session->num_sources; i++) {
-			if (session->pollfds[i].revents > 0 || (ret == 0
-				&& session->source_timeout == session->sources[i].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))
-					sr_session_source_remove(session->sources[i].poll_object);
-			}
+	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)) {
 			/*
-			 * 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.
+			 * Invoke the source's callback on an event,
+			 * or if the poll timed out and this source
+			 * asked for that timeout.
 			 */
-			g_mutex_lock(&session->stop_mutex);
-			if (session->abort_session) {
-				sr_session_stop_sync();
-				/* But once is enough. */
-				session->abort_session = FALSE;
-			}
-			g_mutex_unlock(&session->stop_mutex);
+			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);
+		}
+		/*
+		 * 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();
+			/* But once is enough. */
+			session->abort_session = FALSE;
 		}
+		g_mutex_unlock(&session->stop_mutex);
 	}
 
 	return SR_OK;
@@ -343,7 +350,8 @@ SR_API int sr_session_run(void)
 			session->sources[0].cb(-1, 0, session->sources[0].cb_data);
 	} else {
 		/* Real sources, use g_poll() main loop. */
-		sr_session_run_poll();
+		while (session->num_sources)
+			sr_session_iteration(TRUE);
 	}
 
 	return SR_OK;