Fix mutex about can_frame. Wrong location about

can frame mutex and adding around can socket
init.

Change-Id: I90c2200abf517ad4a9660c99a3ca02e52e069374
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

2 files changed, 8 insertions, 5 deletions

diff --git a/src/can-utils.cpp b/src/can-utils.cpp
index 5a845b31..8bf05670 100644
--- a/src/can-utils.cpp
+++ b/src/can-utils.cpp
@@ -187,18 +187,19 @@ int can_bus_t::init_can_dev()
 		t = devices_name.size();
 		i=0;
 
+		std::lock_guard<std::mutex> can_frame_lock(can_frame_mutex);
 		for(const auto& device : devices_name)
 		{
 			can_bus_dev_t can_bus_device_handler(device);
-			can_bus_device_handler.open();
+			(can_bus_device_handler.open()) ? i++ : ERROR(binder_interface, "Can't open device %s", device);
 			can_bus_device_handler.start_reading(std::ref(*this));
-			i++;
 		}
+		can_frame_mutex.unlock();
 
 		NOTICE(binder_interface, "Initialized %d/%d can bus device(s)", i, t);
 		return 0;
 	}
-	ERROR(binder_interface, "init_can_dev: Error at CAN device initialization. No devices read into configuration file. Did you specify canbus JSON object ?");
+	ERROR(binder_interface, "init_can_dev: Error at CAN device initialization. No devices read from configuration file. Did you specify canbus JSON object ?");
 	return 1;
 }
 
diff --git a/src/low-can-binding.cpp b/src/low-can-binding.cpp
index 233f002a..2fee1146 100644
--- a/src/low-can-binding.cpp
+++ b/src/low-can-binding.cpp
@@ -60,20 +60,22 @@ can_bus_t *can_bus_handler;
 int can_frame_received(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 {
 	can_bus_dev_t *can_bus_dev = (can_bus_dev_t*)userdata;
-	std::lock_guard<std::mutex> can_frame_lock(can_frame_mutex);
 
 	/* Notify reading thread that there is something to read */
 	if ((revents & EPOLLIN) != 0) {
 		new_can_frame.notify_one();
 	}
 
-	/* check if error or hangup */
+	/* check if error or hangup and reopen the socket and event_loop. 
+	 * socket is protected by a mutex */
 	if ((revents & (EPOLLERR|EPOLLRDHUP|EPOLLHUP)) != 0)
 	{
+		std::lock_guard<std::mutex> can_frame_lock(can_frame_mutex);
 		sd_event_source_unref(s);
 		can_bus_dev->close();
 		can_bus_dev->open();
 		can_bus_dev->start_reading(*can_bus_handler);
+		can_bus_dev->event_loop_connection();
 	}
 
 	return 0;