improve dijkstra termination detection implementation: removing lock …

…from criticial path
STEllAR-GROUP · Feb 5, 2024 · f37c5ee · f37c5ee
1 parent 76bcb86
commit f37c5ee
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/libs/full/runtime_distributed/src/server/runtime_support_server.cpp b/libs/full/runtime_distributed/src/server/runtime_support_server.cpp
@@ -227,8 +227,11 @@ namespace hpx { namespace components { namespace server {
     void runtime_support::dijkstra_make_black()
     {
         // Rule 1: A machine sending a message makes itself black.
-        std::lock_guard<dijkstra_mtx_type> l(dijkstra_mtx_);
-        dijkstra_color_ = true;
+        if (!dijkstra_color_)
+        {
+            std::lock_guard<dijkstra_mtx_type> l(dijkstra_mtx_);
+            dijkstra_color_ = true;
+        }
     }
 
     void runtime_support::send_dijkstra_termination_token(