lib: enforce thread_cancel() MT-unsafe invariant

Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/thread.h b/lib/thread.h
index 218672c7bf..7e79eb38dc 100644
--- a/lib/thread.h
+++ b/lib/thread.h
@@ -88,6 +88,7 @@ struct thread_master
   bool spin;
   bool handle_signals;
   pthread_mutex_t mtx;
+  pthread_t owner;
 };
 
 typedef unsigned char thread_type;