Added mutex into shared context

Author: GrigoriyPA

ydb/core/fq/libs/row_dispatcher/common.cpp

@@ -1,5 +1,7 @@
 #include "common.h"
 
+#include <util/system/mutex.h>
+
 #include <ydb/library/yql/public/purecalc/common/interface.h>
 
 namespace NFq {
@@ -9,22 +11,21 @@ namespace {
 class TPureCalcProgramFactory : public IPureCalcProgramFactory {
 public:
     NYql::NPureCalc::IProgramFactoryPtr GetFactory(const TSettings& settings) override {
+        TGuard<TMutex> guard(FactoriesMutex);
+
         const auto it = ProgramFactories.find(settings);
         if (it != ProgramFactories.end()) {
             return it->second;
         }
-        return CreateFactory(settings);
-    }
 
-private:
-    NYql::NPureCalc::IProgramFactoryPtr CreateFactory(const TSettings& settings) {
         return ProgramFactories.insert({settings, NYql::NPureCalc::MakeProgramFactory(
             NYql::NPureCalc::TProgramFactoryOptions()
                 .SetLLVMSettings(settings.EnabledLLVM ? "ON" : "OFF")
         )}).first->second;
     }
 
 private:
+    TMutex FactoriesMutex;
     std::map<TSettings, NYql::NPureCalc::IProgramFactoryPtr> ProgramFactories;
 };