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Optimize RangeList by not doing an allocation on every call to the Find methods

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gdk 2019-11-24 21:29:37 -03:00 • committed by Thog
parent e0c95b18eb
commit d0c7732fe2
3 changed files with 92 additions and 28 deletions
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52
Ryujinx.Graphics.Gpu/Memory/RangeList.cs
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@ -1,9 +1,12 @@
using System;
using System.Collections.Generic;
namespace Ryujinx.Graphics.Gpu.Memory
{
class RangeList<T> where T : IRange<T>
{
private const int ArrayGrowthSize = 32;
private List<T> _items;
public RangeList()
@ -72,14 +75,14 @@ namespace Ryujinx.Graphics.Gpu.Memory
return _items[index];
}
public T[] FindOverlaps(T item)
public int FindOverlaps(T item, ref T[] output)
{
return FindOverlaps(item.Address, item.Size);
return FindOverlaps(item.Address, item.Size, ref output);
}
public T[] FindOverlaps(ulong address, ulong size)
public int FindOverlaps(ulong address, ulong size, ref T[] output)
{
List<T> overlapsList = new List<T>();
int outputIndex = 0;
ulong endAddress = address + size;
@ -94,24 +97,29 @@ namespace Ryujinx.Graphics.Gpu.Memory
if (item.OverlapsWith(address, size))
{
overlapsList.Add(item);
if (outputIndex == output.Length)
{
Array.Resize(ref output, outputIndex + ArrayGrowthSize);
}
output[outputIndex++] = item;
}
}
}
return overlapsList.ToArray();
return outputIndex;
}
public T[] FindOverlapsNonOverlapping(T item)
public int FindOverlapsNonOverlapping(T item, ref T[] output)
{
return FindOverlapsNonOverlapping(item.Address, item.Size);
return FindOverlapsNonOverlapping(item.Address, item.Size, ref output);
}
public T[] FindOverlapsNonOverlapping(ulong address, ulong size)
public int FindOverlapsNonOverlapping(ulong address, ulong size, ref T[] output)
{
// This is a bit faster than FindOverlaps, but only works
// when none of the items on the list overlaps with each other.
List<T> overlapsList = new List<T>();
int outputIndex = 0;
ulong endAddress = address + size;
@ -126,20 +134,25 @@ namespace Ryujinx.Graphics.Gpu.Memory
do
{
overlapsList.Add(_items[index++]);
if (outputIndex == output.Length)
{
Array.Resize(ref output, outputIndex + ArrayGrowthSize);
}
output[outputIndex++] = _items[index++];
}
while (index < _items.Count && _items[index].OverlapsWith(address, size));
}
return overlapsList.ToArray();
return outputIndex;
}
public T[] FindOverlaps(ulong address)
public int FindOverlaps(ulong address, ref T[] output)
{
List<T> overlapsList = new List<T>();
int index = BinarySearch(address);
int outputIndex = 0;
if (index >= 0)
{
while (index > 0 && _items[index - 1].Address == address)
@ -156,11 +169,16 @@ namespace Ryujinx.Graphics.Gpu.Memory
break;
}
overlapsList.Add(overlap);
if (outputIndex == output.Length)
{
Array.Resize(ref output, outputIndex + ArrayGrowthSize);
}
output[outputIndex++] = overlap;
}
}
return overlapsList.ToArray();
return outputIndex;
}
private int BinarySearch(ulong address)