internal long AllocateAligned(long bytes, long alignment)
{
if (alignment <= 0)
{
throw new System.ArgumentException("Invalid alignment: " + alignment + ". Alignment must be positive.");
}
long grabSize = Math.Min(GrabSize, ExpectedMaxMemory);
if (bytes > GrabSize)
{
// This is a huge allocation. Put it in its own grab and keep any existing grab at the head.
grabSize = bytes;
Grab nextGrab = Head == null ? null : Head.next;
Grab allocationGrab = new Grab(nextGrab, grabSize, MemoryTracker);
if (!allocationGrab.CanAllocate(bytes, alignment))
{
allocationGrab.Free();
grabSize = bytes + alignment;
allocationGrab = new Grab(nextGrab, grabSize, MemoryTracker);
}
long allocation = allocationGrab.Allocate(bytes, alignment);
Head = Head == null ? allocationGrab : Head.setNext(allocationGrab);
ExpectedMaxMemory -= bytes;
return(allocation);
}
if (Head == null || !Head.canAllocate(bytes, alignment))
{
if (grabSize < bytes)
{
grabSize = bytes;
Grab grab = new Grab(Head, grabSize, MemoryTracker);
if (grab.CanAllocate(bytes, alignment))
{
ExpectedMaxMemory -= grabSize;
Head = grab;
return(Head.allocate(bytes, alignment));
}
grab.Free();
grabSize = bytes + alignment;
}
Head = new Grab(Head, grabSize, MemoryTracker);
ExpectedMaxMemory -= grabSize;
}
return(Head.allocate(bytes, alignment));
}
