update to latest version

src/libslic3r/Thread.hpp

@@ -4,6 +4,7 @@
 #include <utility>
 #include <string>
 #include <thread>
+#include <random>
 #include <boost/thread.hpp>
 
 #include <tbb/task_scheduler_observer.h>
@@ -67,6 +68,27 @@ template<class Fn> inline boost::thread create_thread(Fn &&fn)
     return create_thread(attrs, std::forward<Fn>(fn));    
 }
 
+class ThreadData {
+public:
+    std::mt19937&   random_generator() {
+        if (! m_random_generator_initialized) {
+            std::random_device rd;
+            m_random_generator.seed(rd());
+            m_random_generator_initialized = true;
+        }
+        return m_random_generator;
+    }
+
+    void            tbb_worker_thread_set_c_locales();
+
+private:
+    std::mt19937    m_random_generator;
+    bool            m_random_generator_initialized { false };
+    bool            m_tbb_worker_thread_c_locales_set { false };
+};
+
+ThreadData& thread_data();
+
 // For unknown reasons and in sporadic cases when GCode export is processing, some participating thread
 // in tbb::parallel_pipeline has not set locales to "C", probably because this thread is newly spawned.
 // So in this class method on_scheduler_entry is called for every thread before it starts participating
@@ -79,11 +101,7 @@ class TBBLocalesSetter : public tbb::task_scheduler_observer
 public:
     TBBLocalesSetter() { this->observe(true); }
     ~TBBLocalesSetter() override { this->observe(false); };
-
-    void on_scheduler_entry(bool is_worker) override;
-
-private:
-    tbb::enumerable_thread_specific<bool, tbb::cache_aligned_allocator<bool>, tbb::ets_key_usage_type::ets_key_per_instance> m_is_locales_sets{ false };
+    void on_scheduler_entry(bool /* is_worker */) override { thread_data().tbb_worker_thread_set_c_locales(); }
 };
 
 }