Пример #1
0
        public NativeAllocator32(int maxSize, byte maxHeight)
        {
            _heightGenerator = new SkipList64.SkipListHeightGenerator64(maxHeight);
            _maxSize         = maxSize;
            _pointer         = VirtualAlloc(IntPtr.Zero, (UIntPtr)maxSize, AllocationType.MEM_COMMIT | AllocationType.MEM_RESERVE, Protection.PAGE_READWRITE);
            if (_pointer == IntPtr.Zero)
            {
                var error = Marshal.GetLastWin32Error();
                throw new OutOfMemoryException($"We could not allocate memory for the skip list error code was {error}");
            }
            _currentPointer = ALIGNMENTSIZE;

            var headNodeSize = SkipListNode32.CalculateSizeNeeded(maxHeight, 0);

            AllocateNode(headNodeSize, out var memory);
            _ = new SkipListNode32(memory, ALIGNMENTSIZE, maxHeight, Array.Empty <byte>());
        }
Пример #2
0
        public ArrayBasedAllocator32(int maxSize, byte maxHeight)
        {
            _heightGenerator = new SkipList64.SkipListHeightGenerator64(maxHeight);
            _maxSize         = maxSize;

            _data         = new byte[maxSize + ALIGNMENTSIZE - 1];
            _gcHandle     = GCHandle.Alloc(_data, GCHandleType.Pinned);
            _initalOffset = (int)(AlignLength(_gcHandle.AddrOfPinnedObject().ToInt64()) - _gcHandle.AddrOfPinnedObject().ToInt64());
            if (_initalOffset == 0)
            {
                _initalOffset += ALIGNMENTSIZE;
            }
            _currentPointer = _initalOffset;

            var headNodeSize = SkipListNode32.CalculateSizeNeeded(maxHeight, 0);

            AllocateNode(headNodeSize, out var memory);
            _ = new SkipListNode32(memory, ALIGNMENTSIZE, maxHeight, Array.Empty <byte>());
        }