X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Fstructure%2Fcommands.hxx;h=0825ffd9fc58c3c97b966d3d498dd11892acd1a6;hb=f1f0fa0aa95c2f1562fa9c09365baf8b2b55bfc7;hp=147c4f3de0f9bb383fc14ee3334e6e2981238123;hpb=733e6fa14ff507a1022ecab8d55cc9bf587bee40;p=simgear.git

diff --git a/simgear/structure/commands.hxx b/simgear/structure/commands.hxx
index 147c4f3d..0825ffd9 100644
--- a/simgear/structure/commands.hxx
+++ b/simgear/structure/commands.hxx
@@ -17,11 +17,13 @@
 #include <map>
 #include <vector>
 
+#include <OpenThreads/Mutex>
+
 #include <simgear/props/props.hxx>
 
-SG_USING_STD(string);
-SG_USING_STD(map);
-SG_USING_STD(vector);
+using std::string;
+using std::map;
+using std::vector;
 
 
 /**
@@ -109,6 +111,8 @@ private:
   typedef map<string,command_t> command_map;
   command_map _commands;
 
+  static OpenThreads::Mutex _instanceMutex;
+
 };
 
 #endif // __COMMANDS_HXX