internal static unsafe void CopyTo <T>(ref T destination, ref T source, int elementsCount)
{
if (elementsCount == 0)
{
return;
}
if (Unsafe.AreSame(ref destination, ref source))
{
return;
}
if (!JitHelpers.ContainsReferences <T>())
{
fixed(byte *pDestination = &Unsafe.As <T, byte>(ref destination))
{
fixed(byte *pSource = &Unsafe.As <T, byte>(ref source))
{
#if BIT64
Buffer.Memmove(pDestination, pSource, (ulong)elementsCount * (ulong)Unsafe.SizeOf <T>());
#else
Buffer.Memmove(pDestination, pSource, (uint)elementsCount * (uint)Unsafe.SizeOf <T>());
#endif
}
}
}
else
{
if (JitHelpers.ByRefLessThan(ref destination, ref source)) // copy forward
{
for (int i = 0; i < elementsCount; i++)
{
Unsafe.Add(ref destination, i) = Unsafe.Add(ref source, i);
}
}
else // copy backward to avoid overlapping issues
{
for (int i = elementsCount - 1; i >= 0; i--)
{
Unsafe.Add(ref destination, i) = Unsafe.Add(ref source, i);
}
}
}
}
