From 5f879ead9155ba66d7395311881f8330df346fd1 Mon Sep 17 00:00:00 2001
From: Donghee Ye <donghee.ye@samsung.com>
Date: Mon, 3 Dec 2018 20:57:21 +0900
Subject: [PATCH] Use atomic bool exchange instead of lock

---
 rmw_fastrtps_shared_cpp/src/types/guard_condition.hpp | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/rmw_fastrtps_shared_cpp/src/types/guard_condition.hpp b/rmw_fastrtps_shared_cpp/src/types/guard_condition.hpp
index 6f0ab0299..ba88faa23 100644
--- a/rmw_fastrtps_shared_cpp/src/types/guard_condition.hpp
+++ b/rmw_fastrtps_shared_cpp/src/types/guard_condition.hpp
@@ -72,10 +72,7 @@ class GuardCondition
   bool
   getHasTriggered()
   {
-    std::lock_guard<std::mutex> lock(internalMutex_);
-    bool ret = hasTriggered_;
-    hasTriggered_ = false;
-    return ret;
+    return hasTriggered_.exchange(false);
   }
 
 private: