mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-11-18 17:46:40 +00:00
97 lines
2.5 KiB
C#
97 lines
2.5 KiB
C#
|
using System;
|
|||
|
using System.Collections.Generic;
|
|||
|
using System.Diagnostics.CodeAnalysis;
|
|||
|
|
|||
|
namespace ARMeilleure.Translation.Cache
|
|||
|
{
|
|||
|
class CacheMemoryAllocator
|
|||
|
{
|
|||
|
private struct MemoryBlock : IComparable<MemoryBlock>
|
|||
|
{
|
|||
|
public int Offset { get; }
|
|||
|
public int Size { get; }
|
|||
|
|
|||
|
public MemoryBlock(int offset, int size)
|
|||
|
{
|
|||
|
Offset = offset;
|
|||
|
Size = size;
|
|||
|
}
|
|||
|
|
|||
|
public int CompareTo([AllowNull] MemoryBlock other)
|
|||
|
{
|
|||
|
return Offset.CompareTo(other.Offset);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
private readonly List<MemoryBlock> _blocks = new List<MemoryBlock>();
|
|||
|
|
|||
|
public CacheMemoryAllocator(int capacity)
|
|||
|
{
|
|||
|
_blocks.Add(new MemoryBlock(0, capacity));
|
|||
|
}
|
|||
|
|
|||
|
public int Allocate(int size)
|
|||
|
{
|
|||
|
for (int i = 0; i < _blocks.Count; i++)
|
|||
|
{
|
|||
|
MemoryBlock block = _blocks[i];
|
|||
|
|
|||
|
if (block.Size > size)
|
|||
|
{
|
|||
|
_blocks[i] = new MemoryBlock(block.Offset + size, block.Size - size);
|
|||
|
return block.Offset;
|
|||
|
}
|
|||
|
else if (block.Size == size)
|
|||
|
{
|
|||
|
_blocks.RemoveAt(i);
|
|||
|
return block.Offset;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
// We don't have enough free memory to perform the allocation.
|
|||
|
return -1;
|
|||
|
}
|
|||
|
|
|||
|
public void Free(int offset, int size)
|
|||
|
{
|
|||
|
Insert(new MemoryBlock(offset, size));
|
|||
|
}
|
|||
|
|
|||
|
private void Insert(MemoryBlock block)
|
|||
|
{
|
|||
|
int index = _blocks.BinarySearch(block);
|
|||
|
|
|||
|
if (index < 0)
|
|||
|
{
|
|||
|
index = ~index;
|
|||
|
}
|
|||
|
|
|||
|
if (index < _blocks.Count)
|
|||
|
{
|
|||
|
MemoryBlock next = _blocks[index];
|
|||
|
|
|||
|
int endOffs = block.Offset + block.Size;
|
|||
|
|
|||
|
if (next.Offset == endOffs)
|
|||
|
{
|
|||
|
block = new MemoryBlock(block.Offset, block.Size + next.Size);
|
|||
|
_blocks.RemoveAt(index);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
if (index > 0)
|
|||
|
{
|
|||
|
MemoryBlock prev = _blocks[index - 1];
|
|||
|
|
|||
|
if (prev.Offset + prev.Size == block.Offset)
|
|||
|
{
|
|||
|
block = new MemoryBlock(block.Offset - prev.Size, block.Size + prev.Size);
|
|||
|
_blocks.RemoveAt(--index);
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
_blocks.Insert(index, block);
|
|||
|
}
|
|||
|
}
|
|||
|
}
|