mirror of
https://github.com/GreemDev/Ryujinx.git
synced 2024-12-04 22:37:57 +01:00
281 lines
8.6 KiB
C#
281 lines
8.6 KiB
C#
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using Ryujinx.Common;
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using Silk.NET.Vulkan;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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namespace Ryujinx.Graphics.Vulkan
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{
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class MemoryAllocatorBlockList : IDisposable
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{
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private const ulong InvalidOffset = ulong.MaxValue;
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public class Block : IComparable<Block>
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{
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public DeviceMemory Memory { get; private set; }
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public IntPtr HostPointer { get; private set; }
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public ulong Size { get; }
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public bool Mapped => HostPointer != IntPtr.Zero;
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private struct Range : IComparable<Range>
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{
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public ulong Offset { get; }
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public ulong Size { get; }
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public Range(ulong offset, ulong size)
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{
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Offset = offset;
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Size = size;
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}
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public int CompareTo(Range other)
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{
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return Offset.CompareTo(other.Offset);
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}
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}
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private readonly List<Range> _freeRanges;
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public Block(DeviceMemory memory, IntPtr hostPointer, ulong size)
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{
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Memory = memory;
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HostPointer = hostPointer;
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Size = size;
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_freeRanges = new List<Range>
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{
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new Range(0, size)
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};
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}
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public ulong Allocate(ulong size, ulong alignment)
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{
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for (int i = 0; i < _freeRanges.Count; i++)
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{
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var range = _freeRanges[i];
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ulong alignedOffset = BitUtils.AlignUp(range.Offset, (int)alignment);
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ulong sizeDelta = alignedOffset - range.Offset;
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ulong usableSize = range.Size - sizeDelta;
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if (sizeDelta < range.Size && usableSize >= size)
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{
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_freeRanges.RemoveAt(i);
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if (sizeDelta != 0)
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{
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InsertFreeRange(range.Offset, sizeDelta);
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}
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ulong endOffset = range.Offset + range.Size;
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ulong remainingSize = endOffset - (alignedOffset + size);
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if (remainingSize != 0)
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{
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InsertFreeRange(endOffset - remainingSize, remainingSize);
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}
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return alignedOffset;
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}
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}
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return InvalidOffset;
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}
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public void Free(ulong offset, ulong size)
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{
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InsertFreeRangeComingled(offset, size);
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}
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private void InsertFreeRange(ulong offset, ulong size)
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{
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var range = new Range(offset, size);
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int index = _freeRanges.BinarySearch(range);
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if (index < 0)
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{
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index = ~index;
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}
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_freeRanges.Insert(index, range);
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}
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private void InsertFreeRangeComingled(ulong offset, ulong size)
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{
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ulong endOffset = offset + size;
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var range = new Range(offset, size);
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int index = _freeRanges.BinarySearch(range);
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if (index < 0)
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{
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index = ~index;
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}
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if (index < _freeRanges.Count && _freeRanges[index].Offset == endOffset)
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{
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endOffset = _freeRanges[index].Offset + _freeRanges[index].Size;
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_freeRanges.RemoveAt(index);
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}
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if (index > 0 && _freeRanges[index - 1].Offset + _freeRanges[index - 1].Size == offset)
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{
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offset = _freeRanges[index - 1].Offset;
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_freeRanges.RemoveAt(--index);
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}
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range = new Range(offset, endOffset - offset);
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_freeRanges.Insert(index, range);
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}
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public bool IsTotallyFree()
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{
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if (_freeRanges.Count == 1 && _freeRanges[0].Size == Size)
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{
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Debug.Assert(_freeRanges[0].Offset == 0);
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return true;
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}
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return false;
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}
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public int CompareTo(Block other)
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{
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return Size.CompareTo(other.Size);
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}
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public unsafe void Destroy(Vk api, Device device)
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{
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if (Mapped)
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{
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api.UnmapMemory(device, Memory);
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HostPointer = IntPtr.Zero;
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}
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if (Memory.Handle != 0)
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{
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api.FreeMemory(device, Memory, null);
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Memory = default;
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}
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}
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}
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private readonly List<Block> _blocks;
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private readonly Vk _api;
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private readonly Device _device;
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public int MemoryTypeIndex { get; }
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private readonly int _blockAlignment;
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public MemoryAllocatorBlockList(Vk api, Device device, int memoryTypeIndex, int blockAlignment)
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{
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_blocks = new List<Block>();
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_api = api;
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_device = device;
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MemoryTypeIndex = memoryTypeIndex;
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_blockAlignment = blockAlignment;
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}
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public unsafe MemoryAllocation Allocate(ulong size, ulong alignment, bool map)
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{
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// Ensure we have a sane alignment value.
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if ((ulong)(int)alignment != alignment || (int)alignment <= 0)
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{
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throw new ArgumentOutOfRangeException(nameof(alignment), $"Invalid alignment 0x{alignment:X}.");
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}
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for (int i = 0; i < _blocks.Count; i++)
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{
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var block = _blocks[i];
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if (block.Mapped == map && block.Size >= size)
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{
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ulong offset = block.Allocate(size, alignment);
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if (offset != InvalidOffset)
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{
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return new MemoryAllocation(this, block, block.Memory, GetHostPointer(block, offset), offset, size);
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}
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}
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}
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ulong blockAlignedSize = BitUtils.AlignUp(size, _blockAlignment);
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var memoryAllocateInfo = new MemoryAllocateInfo()
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{
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SType = StructureType.MemoryAllocateInfo,
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AllocationSize = blockAlignedSize,
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MemoryTypeIndex = (uint)MemoryTypeIndex
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};
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_api.AllocateMemory(_device, memoryAllocateInfo, null, out var deviceMemory).ThrowOnError();
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IntPtr hostPointer = IntPtr.Zero;
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if (map)
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{
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unsafe
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{
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void* pointer = null;
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_api.MapMemory(_device, deviceMemory, 0, blockAlignedSize, 0, ref pointer).ThrowOnError();
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hostPointer = (IntPtr)pointer;
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}
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}
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var newBlock = new Block(deviceMemory, hostPointer, blockAlignedSize);
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InsertBlock(newBlock);
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ulong newBlockOffset = newBlock.Allocate(size, alignment);
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Debug.Assert(newBlockOffset != InvalidOffset);
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return new MemoryAllocation(this, newBlock, deviceMemory, GetHostPointer(newBlock, newBlockOffset), newBlockOffset, size);
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}
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private static IntPtr GetHostPointer(Block block, ulong offset)
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{
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if (block.HostPointer == IntPtr.Zero)
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{
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return IntPtr.Zero;
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}
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return (IntPtr)((nuint)(nint)block.HostPointer + offset);
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}
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public unsafe void Free(Block block, ulong offset, ulong size)
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{
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block.Free(offset, size);
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if (block.IsTotallyFree())
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{
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for (int i = 0; i < _blocks.Count; i++)
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{
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if (_blocks[i] == block)
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{
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_blocks.RemoveAt(i);
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break;
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}
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}
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block.Destroy(_api, _device);
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}
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}
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private void InsertBlock(Block block)
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{
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int index = _blocks.BinarySearch(block);
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if (index < 0)
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{
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index = ~index;
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}
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_blocks.Insert(index, block);
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}
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public unsafe void Dispose()
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{
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for (int i = 0; i < _blocks.Count; i++)
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{
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_blocks[i].Destroy(_api, _device);
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}
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}
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}
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}
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