/// <summary>
        /// The Allocate
        /// </summary>
        /// <param name="sizeInBytes">The <see cref="long"/></param>
        /// <param name="alignement">The <see cref="long"/></param>
        /// <returns>The <see cref="DynAlloc"/></returns>
        public DynAlloc Allocate(long sizeInBytes, long alignement = Constants.DEFAULT_ALIGN)
        {
            var alignementMask = alignement - 1;

            Debug.Assert((alignementMask & alignement) == 0);

            var alignedSize = sizeInBytes.AlignUpWithMask(alignementMask);

            if (alignedSize > _PageSize)
            {
                return(AllocateLargePage(alignedSize));
            }

            _CurrentOffset = _CurrentOffset.AlignUpWithMask(alignementMask);

            if (_CurrentOffset + alignedSize > _PageSize)
            {
                Debug.Assert(_CurPage != null);
                _RetiredPages.Add(_CurPage);
                _CurPage = null;
            }

            if (_CurPage == null)
            {
                _CurPage       = _PageManager[(int)_Type].RequestPage();
                _CurrentOffset = 0;
            }

            var ret = new DynAlloc(_CurPage, _CurrentOffset, alignedSize, new IntPtr(_CurPage.CPUVirtualAddress.ToInt64() + _CurrentOffset), _CurPage.GPUVirtualAddress + _CurrentOffset);

            _CurrentOffset += alignedSize;

            return(ret);
        }