/// <summary>
/// Pseudo-randomly advances and records the given probe value for the
/// given thread.
/// Duplicated from ThreadLocalRandom because of packaging restrictions.
/// </summary>
internal static int AdvanceProbe(int probe)
{
probe ^= probe << 13; // xorshift
probe ^= (int)((uint)probe >> 17);
probe ^= probe << 5;
UNSAFE.putInt(Thread.CurrentThread, PROBE, probe);
return(probe);
}
/// <summary>
/// Returns the pseudo-randomly initialized or updated secondary seed.
/// Copied from ThreadLocalRandom due to package access restrictions.
/// </summary>
internal static int NextSecondarySeed()
{
int r;
Thread t = Thread.CurrentThread;
if ((r = UNSAFE.getInt(t, SECONDARY)) != 0)
{
r ^= r << 13; // xorshift
r ^= (int)((uint)r >> 17);
r ^= r << 5;
}
else if ((r = java.util.concurrent.ThreadLocalRandom.Current().NextInt()) == 0)
{
r = 1; // avoid zero
}
UNSAFE.putInt(t, SECONDARY, r);
return(r);
}
