private void assureFreeMemoryByStartAccumulation(long bytes)
{
MemoryBlockByAddress freeBlock = new MemoryBlockByAddress(-1L, 0L);
int removedBlocks = 0;
foreach (MemoryBlockByAddress block in this.structureByAddress)
{
if (freeBlock.Address < 0L)
{
freeBlock = block;
removedBlocks++;
continue;
}
long occupiedBytes = block.Address - freeBlock.End;
if (occupiedBytes < 0)
{
throw new InvalidOperationException("Allocated memory is overlapping.");
}
if (occupiedBytes == 0)
{
freeBlock.Size += block.Size;
}
else
{
this.memoryMove(freeBlock.End, freeBlock.Address, occupiedBytes);
MemoryBlockByAddress foundNode;
int startIndex = this.allocationsByAddress.GetLeftmostGreaterOrEqualIndex(new MemoryBlockByAddress(freeBlock.End, 0L), out foundNode);
int endIndexExclusive = this.allocationsByAddress.GetLeftmostGreaterOrEqualIndex(new MemoryBlockByAddress(block.Address, 0L), out foundNode);
long delta = freeBlock.Size;
for (int i = endIndexExclusive; --i >= startIndex;)
{
this.allocationsByAddress[i].Address -= delta;
}
freeBlock = new MemoryBlockByAddress(block.Address - freeBlock.Size, block.Size + freeBlock.Size);
}
removedBlocks++;
if (freeBlock.Size >= bytes)
{
break;
}
}
for (int i = removedBlocks; --i >= 0;)
{
MemoryBlockBySize blockBySize = this.structureByAddress[i].ToSize;
this.structureBySize.Remove(blockBySize);
this.structureByAddress.RemoveAt(i);
}
this.structureByAddress.Add(freeBlock);
this.structureBySize.Add(freeBlock.ToSize);
}
private void assureFreeMemoryByMinimumMemoryCopy(long bytes)
{
int n = this.structureByAddress.Count;
MemoryRange[] memory = new MemoryRange[n];
int storeIndex = 0;
long lastPointer = 0L, totalFreeSoFar = 0L, totalCostSoFar = 0L;
foreach (MemoryBlockByAddress block in this.structureByAddress)
{
long occupiedBytes = block.Address - lastPointer;
totalFreeSoFar += block.Size;
totalCostSoFar += occupiedBytes;
memory[storeIndex++] = new MemoryRange(totalFreeSoFar, totalCostSoFar);
lastPointer = block.End;
}
if (totalFreeSoFar != this.free)
{
throw new InvalidOperationException("Free memory mismatch.");
}
int startIndex = -1, endIndex = -1;
long maxFreeBlockCost = long.MaxValue;
int j = memory.BinarySearchLeftmostGreaterOrEqual(bytes, mr => mr.TotalFreeBytes);
for (int i = 0; i < n && j < n; i++)
{
long cost = memory[j].TotalCost - memory[i].TotalCost;
long freeBytes = memory[j].TotalFreeBytes - (i == 0 ? 0L : memory[i - 1].TotalFreeBytes);
if (freeBytes >= bytes && cost < maxFreeBlockCost)
{
startIndex = i;
endIndex = j;
maxFreeBlockCost = cost;
}
while (j < n && memory[j].TotalFreeBytes - memory[i].TotalFreeBytes < bytes)
{
j++;
}
}
long actualCost = 0L;
MemoryBlockByAddress resultBlock = this.structureByAddress[startIndex];
for (int i = startIndex + 1; i <= endIndex; i++)
{
MemoryBlockByAddress foundNode, block = this.structureByAddress[i];
long count = block.Address - resultBlock.End;
this.memoryMove(resultBlock.End, resultBlock.Address, count);
int sti = this.allocationsByAddress.GetLeftmostGreaterOrEqualIndex(new MemoryBlockByAddress(resultBlock.End, 0L), out foundNode);
int eni = this.allocationsByAddress.GetLeftmostGreaterOrEqualIndex(new MemoryBlockByAddress(block.Address, 0L), out foundNode);
actualCost += count;
long delta = resultBlock.Size;
for (int k = eni; --k >= sti;)
{
this.allocationsByAddress[k].Address -= delta;
}
resultBlock = new MemoryBlockByAddress(block.Address - resultBlock.Size, resultBlock.Size + block.Size);
}
if (actualCost != maxFreeBlockCost)
{
Debugger.Break();
}
for (int i = endIndex + 1; --i >= startIndex;)
{
MemoryBlockBySize memoryBlockSize = this.structureByAddress[i].ToSize;
this.structureBySize.Remove(memoryBlockSize);
this.structureByAddress.RemoveAt(i);
}
this.structureByAddress.Add(resultBlock);
this.structureBySize.Add(resultBlock.ToSize);
}