Rename randomSeedTime to randomInit and assert that it's called only

once

include/util.hpp

@@ -69,7 +69,7 @@ T *construct(F f, V v, Args... args) {
 ////////////////////
 
 /** Seeds the RNG with the current time */
-void randomSeedTime();
+void randomInit();
 uint32_t randomu32();
 uint64_t randomu64();
 /** Returns a uniform random float in the interval [0.0, 1.0) */

src/main.cpp

@@ -11,7 +11,7 @@
 using namespace rack;
 
 int main(int argc, char* argv[]) {
-	randomSeedTime();
+	randomInit();
 
 #ifdef RELEASE
 	std::string logFilename = assetLocal("log.txt");

src/util.cpp

@@ -21,7 +21,7 @@ namespace rack {
 // xoroshiro128+
 // from http://xoroshiro.di.unimi.it/xoroshiro128plus.c
 
-static uint64_t xoroshiro128plus_state[2];
+static uint64_t xoroshiro128plus_state[2] = {};
 
 static uint64_t rotl(const uint64_t x, int k) {
 	return (x << k) | (x >> (64 - k));
@@ -39,7 +39,9 @@ static uint64_t xoroshiro128plus_next(void) {
 	return result;
 }
 
-void randomSeedTime() {
+void randomInit() {
+	// Only allow the seed to be initialized once during the lifetime of the program.
+	assert(xoroshiro128plus_state[0] == 0 && xoroshiro128plus_state[1] == 0);
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
 	xoroshiro128plus_state[0] = tv.tv_sec;