address klocwork issues (#2085)

src/ngraph/file_util.cpp

@@ -345,12 +345,14 @@ string file_util::tmp_filename(const string& extension)
     string tmp_template =
         file_util::path_join(file_util::get_temp_directory_path(), "ngraph_XXXXXX" + extension);
     char* tmpname = strdup(tmp_template.c_str());
+    if (tmpname != nullptr)
+    {
+        // mkstemp opens the file with open() so we need to close it
+        close(mkstemps(tmpname, static_cast<int>(extension.size())));
 
-    // mkstemp opens the file with open() so we need to close it
-    close(mkstemps(tmpname, static_cast<int>(extension.size())));
-
-    rc = tmpname;
-    free(tmpname);
+        rc = tmpname;
+        free(tmpname);
+    }
 #endif
     return rc;
 }

src/ngraph/op/constant.hpp

@@ -265,8 +265,7 @@ namespace ngraph
             Shape m_shape{};
             void* m_data{nullptr};
             Constant(const Constant&) = delete;
-            Constant(Constant&&) = delete;
-            Constant operator=(const Constant*) = delete;
+            Constant operator=(const Constant&) = delete;
         };
 
         class ScalarConstantLikeBase : public Constant

src/ngraph/runtime/cpu/cpu_executor.cpp

@@ -97,7 +97,8 @@ namespace ngraph
 
                 CPUExecutor& GetCPUExecutor()
                 {
-                    static CPUExecutor cpu_executor(GetNumThreadPools());
+                    static int num_thread_pools = GetNumThreadPools();
+                    static CPUExecutor cpu_executor(num_thread_pools < 1 ? 1 : num_thread_pools);
                     return cpu_executor;
                 }