private void InsertBlock(
long BasePosition,
long PagesCount,
MemoryState State,
MemoryPermission Permission = MemoryPermission.None,
MemoryAttribute Attribute = MemoryAttribute.None)
{
//Inserts new block at the list, replacing and spliting
//existing blocks as needed.
KMemoryBlock Block = new KMemoryBlock(BasePosition, PagesCount, State, Permission, Attribute);
ulong Start = (ulong)BasePosition;
ulong End = (ulong)PagesCount * PageSize + Start;
LinkedListNode <KMemoryBlock> NewNode = null;
LinkedListNode <KMemoryBlock> Node = Blocks.First;
while (Node != null)
{
KMemoryBlock CurrBlock = Node.Value;
LinkedListNode <KMemoryBlock> NextNode = Node.Next;
ulong CurrStart = (ulong)CurrBlock.BasePosition;
ulong CurrEnd = (ulong)CurrBlock.PagesCount * PageSize + CurrStart;
if (Start < CurrEnd && CurrStart < End)
{
if (Start >= CurrStart && End <= CurrEnd)
{
Block.Attribute |= CurrBlock.Attribute & MemoryAttribute.IpcAndDeviceMapped;
}
if (Start > CurrStart && End < CurrEnd)
{
CurrBlock.PagesCount = (long)((Start - CurrStart) / PageSize);
long NextPagesCount = (long)((CurrEnd - End) / PageSize);
NewNode = Blocks.AddAfter(Node, Block);
Blocks.AddAfter(NewNode, new KMemoryBlock(
(long)End,
NextPagesCount,
CurrBlock.State,
CurrBlock.Permission,
CurrBlock.Attribute));
break;
}
else if (Start <= CurrStart && End < CurrEnd)
{
CurrBlock.BasePosition = (long)End;
CurrBlock.PagesCount = (long)((CurrEnd - End) / PageSize);
if (NewNode == null)
{
NewNode = Blocks.AddBefore(Node, Block);
}
}
else if (Start > CurrStart && End >= CurrEnd)
{
CurrBlock.PagesCount = (long)((Start - CurrStart) / PageSize);
if (NewNode == null)
{
NewNode = Blocks.AddAfter(Node, Block);
}
}
else
{
if (NewNode == null)
{
NewNode = Blocks.AddBefore(Node, Block);
}
Blocks.Remove(Node);
}
}
Node = NextNode;
}
if (NewNode == null)
{
NewNode = Blocks.AddFirst(Block);
}
MergeEqualStateNeighbours(NewNode);
}
private void InsertBlock(
long BasePosition,
long PagesCount,
MemoryState OldState,
MemoryPermission OldPermission,
MemoryAttribute OldAttribute,
MemoryState NewState,
MemoryPermission NewPermission,
MemoryAttribute NewAttribute)
{
//Insert new block on the list only on areas where the state
//of the block matches the state specified on the Old* state
//arguments, otherwise leave it as is.
OldAttribute |= MemoryAttribute.IpcAndDeviceMapped;
ulong Start = (ulong)BasePosition;
ulong End = (ulong)PagesCount * PageSize + Start;
LinkedListNode <KMemoryBlock> Node = Blocks.First;
while (Node != null)
{
LinkedListNode <KMemoryBlock> NewNode = Node;
LinkedListNode <KMemoryBlock> NextNode = Node.Next;
KMemoryBlock CurrBlock = Node.Value;
ulong CurrStart = (ulong)CurrBlock.BasePosition;
ulong CurrEnd = (ulong)CurrBlock.PagesCount * PageSize + CurrStart;
if (Start < CurrEnd && CurrStart < End)
{
MemoryAttribute CurrBlockAttr = CurrBlock.Attribute | MemoryAttribute.IpcAndDeviceMapped;
if (CurrBlock.State != OldState ||
CurrBlock.Permission != OldPermission ||
CurrBlockAttr != OldAttribute)
{
Node = NextNode;
continue;
}
if (CurrStart >= Start && CurrEnd <= End)
{
CurrBlock.State = NewState;
CurrBlock.Permission = NewPermission;
CurrBlock.Attribute &= ~MemoryAttribute.IpcAndDeviceMapped;
CurrBlock.Attribute |= NewAttribute;
}
else if (CurrStart >= Start)
{
CurrBlock.BasePosition = (long)End;
CurrBlock.PagesCount = (long)((CurrEnd - End) / PageSize);
long NewPagesCount = (long)((End - CurrStart) / PageSize);
NewNode = Blocks.AddBefore(Node, new KMemoryBlock(
(long)CurrStart,
NewPagesCount,
NewState,
NewPermission,
NewAttribute));
}
else if (CurrEnd <= End)
{
CurrBlock.PagesCount = (long)((Start - CurrStart) / PageSize);
long NewPagesCount = (long)((CurrEnd - Start) / PageSize);
NewNode = Blocks.AddAfter(Node, new KMemoryBlock(
BasePosition,
NewPagesCount,
NewState,
NewPermission,
NewAttribute));
}
else
{
CurrBlock.PagesCount = (long)((Start - CurrStart) / PageSize);
long NextPagesCount = (long)((CurrEnd - End) / PageSize);
NewNode = Blocks.AddAfter(Node, new KMemoryBlock(
BasePosition,
PagesCount,
NewState,
NewPermission,
NewAttribute));
Blocks.AddAfter(NewNode, new KMemoryBlock(
(long)End,
NextPagesCount,
CurrBlock.State,
CurrBlock.Permission,
CurrBlock.Attribute));
NextNode = null;
}
MergeEqualStateNeighbours(NewNode);
}
Node = NextNode;
}
}