public static void QuickStart_RandomVault()
{
// RandomVault is a random number pool.
// It's thread-safe and faster than lock in most cases.
var mt = new MersenneTwister(); // Create a random generator.
var rv = new RandomVault(() => mt.NextUInt64(), x => mt.NextBytes(x)); // Specify NextULong() or NextBytes() or both delegates, and forget about mt.
Console.WriteLine("RandomVault:");
Console.WriteLine(rv.NextInt64());
Console.WriteLine(rv.NextDouble());
}
public static void Test1()
{
var mt2 = new MersenneTwister(new ulong[] { 0x12345UL, 0x23456UL, 0x34567UL, 0x45678UL });
var poolSliding = new RandomVault(() => mt2.NextUInt64(), x => mt2.NextBytes(x));
Debug.Assert(poolSliding.NextUInt64() == 7266447313870364031UL);
for (var i = 0; i < 20000; i++)
{
poolSliding.NextUInt64();
}
var mt3 = new MersenneTwister(new ulong[] { 0x12345UL, 0x23456UL, 0x34567UL, 0x45678UL });
var poolConcurrentQueue = new RandomPoolConcurrentQueue(() => mt3.NextUInt64(), x => mt3.NextBytes(x));
Debug.Assert(poolConcurrentQueue.NextULong() == 7266447313870364031UL);
for (var i = 0; i < 20000; i++)
{
poolConcurrentQueue.NextULong();
}
}
public void Test1()
{
var xo = new Xoshiro256StarStar(42);
var rv = new RandomVault(() => xo.NextUInt64(), x => xo.NextBytes(x));
DoubleToString(rv.NextDouble()).Is("0.0838629710598822");
DoubleToString(rv.NextDouble()).Is("0.3789802506626686");
DoubleToString(rv.NextDouble()).Is("0.6800434110281394");
DoubleToString(rv.NextDouble()).Is("0.9246929453253876");
DoubleToString(rv.NextDouble()).Is("0.9918039142821028");
string DoubleToString(double d) => d.ToString("F16");
rv.NextUInt64().Is(14199186830065750584ul);
rv.NextUInt64().Is(13267978908934200754ul);
rv.NextUInt64().Is(15679888225317814407ul);
rv.NextUInt64().Is(14044878350692344958ul);
rv.NextUInt64().Is(10760895422300929085ul);
// NextULong only
xo = new Xoshiro256StarStar(42);
rv = new RandomVault(() => xo.NextUInt64(), null);
DoubleToString(rv.NextDouble()).Is("0.0838629710598822");
DoubleToString(rv.NextDouble()).Is("0.3789802506626686");
DoubleToString(rv.NextDouble()).Is("0.6800434110281394");
DoubleToString(rv.NextDouble()).Is("0.9246929453253876");
DoubleToString(rv.NextDouble()).Is("0.9918039142821028");
rv.NextUInt64().Is(14199186830065750584ul);
rv.NextUInt64().Is(13267978908934200754ul);
rv.NextUInt64().Is(15679888225317814407ul);
rv.NextUInt64().Is(14044878350692344958ul);
rv.NextUInt64().Is(10760895422300929085ul);
// NextBytes only
xo = new Xoshiro256StarStar(42);
rv = new RandomVault(null, x => xo.NextBytes(x));
DoubleToString(rv.NextDouble()).Is("0.0838629710598822");
DoubleToString(rv.NextDouble()).Is("0.3789802506626686");
DoubleToString(rv.NextDouble()).Is("0.6800434110281394");
DoubleToString(rv.NextDouble()).Is("0.9246929453253876");
DoubleToString(rv.NextDouble()).Is("0.9918039142821028");
rv.NextUInt64().Is(14199186830065750584ul);
rv.NextUInt64().Is(13267978908934200754ul);
rv.NextUInt64().Is(15679888225317814407ul);
rv.NextUInt64().Is(14044878350692344958ul);
rv.NextUInt64().Is(10760895422300929085ul);
// Multi-thread
var xo2 = new Xoshiro256StarStar(42);
var rv2 = new RandomVault(() => xo2.NextUInt64(), x => xo2.NextBytes(x));
const int P = 100;
const int N = 1000;
var array = new Queue <ulong> [P];
var t = Parallel.For(0, P, x =>
{
var queue = new Queue <ulong>();
for (var i = 0; i < N; i++)
{
queue.Enqueue(rv2.NextUInt64());
}
array[x] = queue;
});
var ss = new SortedSet <ulong>();
for (var i = 0; i < P; i++)
{
array[i].Count.Is(N);
while (array[i].TryDequeue(out var u))
{
ss.Contains(u).IsFalse();
ss.Add(u);
}
}
ss.Count.Is(P * N);
}
