fortuna: add mtx_random_data

fortuna.cpp

@@ -55,6 +55,8 @@ Fortuna::~Fortuna() noexcept {
 
 
 auto Fortuna::random_data(unsigned int n_bytes) -> void {
+	std::lock_guard<std::mutex> lg(mtx_random_data);
+
 	const auto start{std::chrono::system_clock::now()};
 	fmt::print("random_data starting - {}\n", start);
 	auto elapsed{std::chrono::duration_cast<std::chrono::milliseconds>(

fortuna.h

@@ -19,6 +19,7 @@ class Fortuna {
 public:
 	static constexpr const char NUM_OF_POOLS{32};
 	std::mutex mtx;
+	std::mutex mtx_random_data;
 	std::mutex accu_mtx;
 	std::mutex print_mtx;
 	std::thread th_gen;