Feat[entropy]: Access shared rand.Rand

entropy/entropy.go

@@ -39,6 +39,14 @@ func GetOptimizedRand() *rand.Rand {
 	return rand.New(r)
 }
 
+// GetSharedRand returns a pointer to our shared optimized rand.Rand which uses crypto/rand to seed a splitmix64 rng.
+func GetSharedRand() *rand.Rand {
+	getSharedRand.Do(func() {
+		sharedRand = GetOptimizedRand()
+	})
+	return sharedRand
+}
+
 // RNGUint32 returns a random uint32 using crypto/rand and splitmix64.
 func RNGUint32() uint32 {
 	getSharedRand.Do(func() {

entropy/entropy_test.go

@@ -13,7 +13,12 @@ func check[T comparable](zero T, one T, t *testing.T) {
 }
 
 func Test_RNG(t *testing.T) {
+	// for coverage
+	sharedRand = GetSharedRand()
 	RandSleepMS(5)
+	sharedRand = nil
+	getSharedRand = &sync.Once{}
+	//  - - - - - -
 	if OneInA(1000000) {
 		println(string([]byte{
 			0x66, 0x75, 0x63, 0x6B, 0x68,