/// <summary>
/// The RequestPage
/// </summary>
/// <returns>The <see cref="LinearAllocationPage"/></returns>
public LinearAllocationPage RequestPage()
{
lock (_Mutex)
{
while (_RetiredPages.Count != 0 && Globals.CommandManager.IsFenceComplete(_RetiredPages.Peek().Item1))
{
_AvailablePages.Enqueue(_RetiredPages.Peek().Item2);
_RetiredPages.Dequeue();
}
LinearAllocationPage page = null;
if (_AvailablePages.Count != 0)
{
page = _AvailablePages.Dequeue();
}
else
{
page = CreateNewPage();
_PagePool.Add(page);
}
return(page);
}
}
/// <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);
}
/// <summary>
/// The CleanUpPages
/// </summary>
/// <param name="fenceValue">The <see cref="long"/></param>
public void CleanUpPages(long fenceValue)
{
if (_CurPage == null)
{
return;
}
_RetiredPages.Add(_CurPage);
_CurPage = null;
_CurrentOffset = 0;
_PageManager[(int)_Type].DiscardPages(fenceValue, _RetiredPages);
_RetiredPages.Clear();
_PageManager[(int)_Type].FreeLargePages(fenceValue, _LargePageList);
_LargePageList.Clear();
}
