GATTHandler: Add mtx_command for all public accessible functions, ensuring sequential processing is ensured

GATTHandler servers one device, however, applications may utilize multithreading
and concurrent command requests may lead to wrong replies.

Similar to DBTManager and HCIHandler, top-level entries shall be synchronized.

1 files changed, 1 insertions, 0 deletions

diff --git a/api/direct_bt/GATTHandler.hpp b/api/direct_bt/GATTHandler.hpp
index 92a79c38..4652a4f2 100644
--- a/api/direct_bt/GATTHandler.hpp
+++ b/api/direct_bt/GATTHandler.hpp
@@ -85,6 +85,7 @@ namespace direct_bt {
             std::shared_ptr<DBTDevice> device;
             const std::string deviceString;
             std::recursive_mutex mtx_write;
+            std::recursive_mutex mtx_command;
             POctets rbuffer;
 
             L2CAPComm l2cap;