1 files changed, 4 insertions, 0 deletions
diff --git a/entityx/Entity.h b/entityx/Entity.h
index 3217ae5..a423f8f 100644
--- a/entityx/Entity.h
+++ b/entityx/Entity.h
@@ -16,6 +16,7 @@
 #include <new>
 #include <cstdlib>
 #include <algorithm>
+#include <mutex>
 #include <bitset>
 #include <cassert>
 #include <iostream>
@@ -462,8 +463,11 @@ class EntityManager : entityx::help::NonCopyable {
     template <typename T> struct identity { typedef T type; };
 
     void each(typename identity<std::function<void(Entity entity, Components&...)>>::type f) {
+      static std::mutex locked;
+      locked.lock();
       for (auto it : *this)
         f(it, *(it.template component<Components>().get())...);
+      locked.unlock();
     }
 
   private: