chore(fortuna): add random_data() checks, batch 1

fortuna.cpp

@@ -16,6 +16,9 @@
 
 
 namespace fortuna {
+	static constexpr const unsigned int min_pool_size{64};
+
+
 	Fortuna::Fortuna() {
 		try {
 			initialize_prng();
@@ -28,7 +31,19 @@ namespace fortuna {
 	auto Fortuna::random_data(unsigned int n_bytes) -> void {
 		const auto start{std::chrono::system_clock::now()};
 		fmt::print("random_data starting - {}\n", start);
-		incr_reseed_ctr();
+		auto now{std::chrono::steady_clock::now()};
+		auto elapsed{
+			std::chrono::duration_cast<std::chrono::milliseconds>(
+				std::chrono::steady_clock::now().time_since_epoch() -
+				now.time_since_epoch()
+			)
+		};
+		fmt::print("last_reseed: {} ago\n", elapsed);
+		if (sizeof(R.pools[0]) >= min_pool_size && elapsed > R.Gen.reseed_interval) {
+			// TODO(me): call to generate_random_data will be moved here
+			incr_reseed_ctr();
+		}
+		R.last_reseed = std::chrono::steady_clock::now();
 
 		std::string n{R.Gen.generate_random_data(n_bytes)};
 		fmt::print("got you {} proper bytes from generate_random_data -> {}\n",
@@ -39,6 +54,8 @@ namespace fortuna {
 		std::chrono::duration<float> diff = end-start;
 		fmt::print("random_data done - {}\n", end);
 		fmt::print("getting random data took {:.{}f}s\n", diff.count(), 12);
+		// TODO(me): eventually call reseed here
+		// R.Gen.reseed("");
 	} //random_data
 
 } // namespace fortuna

fortuna.h

@@ -6,6 +6,8 @@
 
 #include <fmt/core.h>
 
+#include <chrono>
+
 namespace fortuna {
 
 class Fortuna {
@@ -66,6 +68,8 @@ public:
 		unsigned __int128 reseed_ctr;
 		#pragma GCC diagnostic pop
 		accumulator::Pool pools[num_of_pools];
+
+		std::chrono::steady_clock::time_point last_reseed;
 	}; // class R_state
 
 	fortuna::Fortuna::R_state R;

generator.h

@@ -11,6 +11,8 @@ namespace generator {
 
 class Generator {
 public:
+	std::chrono::milliseconds reseed_interval{100};
+
 	Generator(); // ad noexcept: perhaps _do_ throw*
 	~Generator() noexcept;