Transports now export their state.

* runtime/transport/transport.h: Added prototype for
  _stp_transport_get_state().
* runtime/transport/relay_v2.c (_stp_transport_get_state): New function.
* runtime/transport/relayfs.c (_stp_transport_get_state): Ditto.
* runtime/transport/ring_buffer.c (_stp_transport_data_fs_init): Sets
  state.
  (_stp_transport_data_fs_start): Ditto.
  (_stp_transport_data_fs_stop): Ditto.
  (_stp_transport_get_state): Returns state.
* runtime/print_new.c (stp_print_flush): Checks transport state before
  trying to flush.

1 files changed, 5 insertions, 6 deletions

diff --git a/runtime/transport/relayfs.c b/runtime/transport/relayfs.c
index c557efbc..338b2771 100644
--- a/runtime/transport/relayfs.c
+++ b/runtime/transport/relayfs.c
@@ -23,12 +23,6 @@
 #include <linux/relayfs_fs.h>
 #include <linux/namei.h>
 
-enum _stp_transport_state {
-	STP_TRANSPORT_STOPPED,
-	STP_TRANSPORT_INITIALIZED,
-	STP_TRANSPORT_RUNNING,
-};
-
 struct _stp_relay_data_type {
 	enum _stp_transport_state transport_state;
 	struct rchan *rchan;
@@ -136,6 +130,11 @@ err:
 	return rc;
 }
 
+static enum _stp_transport_state _stp_transport_get_state(void)
+{
+	return _stp_relay_data.transport_state;
+}
+
 static void _stp_transport_data_fs_overwrite(int overwrite)
 {
 	_stp_relay_data.rchan->overwrite = overwrite;