/// <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);
}
