[HICN-488] Adding lock to vapi calls and manage vapi_connect in order to connect only once.

- Added library to hicn-plugin called safe_vapi that takes care of handling concurrent calls to the vapi.
- Removed dependency of libhicnctrl from libtransport and added dependency to safe_vapi.
- Added dependency to safe_vapi on libhicnctrl

Change-Id: Ie49e8319f64a50e7ed6a56e041db977c3b184cc5
Signed-off-by: Alberto Compagno <acompagn+fdio@cisco.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/hicn-plugin/vapi/include/vapi/vapi_safe.h b/hicn-plugin/vapi/include/vapi/vapi_safe.h
new file mode 100644
index 000000000..df1114cde
--- /dev/null
+++ b/hicn-plugin/vapi/include/vapi/vapi_safe.h
@@ -0,0 +1,19 @@
+#ifndef VAPI_SAFE
+#include <vapi/vapi.h>
+#include <pthread.h>
+
+extern pthread_mutex_t *mutex;
+
+vapi_error_e vapi_connect_safe(vapi_ctx_t * vapi_ctx_ret, int async);
+
+vapi_error_e vapi_disconnect_safe();
+void vapi_lock();
+
+void vapi_unlock();
+
+#define VAPI_SAFE (NAME, res, ...)		\
+    vapi_lock();                                \
+    res = ## NAME (__ARGS__);			\
+    vapi_unlock();
+
+#endif //VAPI_SAFE