mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-08-18 22:58:43 +02:00
343 lines
11 KiB
C#
343 lines
11 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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namespace Ryujinx.Graphics.Gpu.Memory
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{
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/// <summary>
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/// List of GPU resources with data on guest memory.
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/// </summary>
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/// <typeparam name="T">Type of the GPU resource</typeparam>
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class RangeList<T> : IEnumerable<T> where T : IRange
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{
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private const int ArrayGrowthSize = 32;
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private readonly List<T> _items;
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/// <summary>
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/// Creates a new GPU resources list.
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/// </summary>
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public RangeList()
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{
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_items = new List<T>();
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}
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/// <summary>
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/// Adds a new item to the list.
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/// </summary>
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/// <param name="item">The item to be added</param>
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public void Add(T item)
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{
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int index = BinarySearch(item.Address);
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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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_items.Insert(index, item);
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}
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/// <summary>
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/// Removes an item from the list.
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/// </summary>
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/// <param name="item">The item to be removed</param>
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/// <returns>True if the item was removed, or false if it was not found</returns>
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public bool Remove(T item)
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{
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int index = BinarySearch(item.Address);
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if (index >= 0)
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{
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while (index > 0 && _items[index - 1].Address == item.Address)
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{
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index--;
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}
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while (index < _items.Count)
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{
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if (_items[index].Equals(item))
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{
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_items.RemoveAt(index);
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return true;
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}
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if (_items[index].Address > item.Address)
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{
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break;
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}
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index++;
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}
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}
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return false;
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}
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/// <summary>
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/// Gets the first item on the list overlapping in memory with the specified item.
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/// </summary>
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/// <remarks>
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/// Despite the name, this has no ordering guarantees of the returned item.
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/// It only ensures that the item returned overlaps the specified item.
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/// </remarks>
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/// <param name="item">Item to check for overlaps</param>
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/// <returns>The overlapping item, or the default value for the type if none found</returns>
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public T FindFirstOverlap(T item)
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{
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return FindFirstOverlap(item.Address, item.Size);
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}
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/// <summary>
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/// Gets the first item on the list overlapping the specified memory range.
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/// </summary>
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/// <remarks>
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/// Despite the name, this has no ordering guarantees of the returned item.
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/// It only ensures that the item returned overlaps the specified memory range.
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/// </remarks>
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/// <param name="address">Start address of the range</param>
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/// <param name="size">Size in bytes of the range</param>
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/// <returns>The overlapping item, or the default value for the type if none found</returns>
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public T FindFirstOverlap(ulong address, ulong size)
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{
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int index = BinarySearch(address, size);
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if (index < 0)
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{
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return default(T);
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}
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return _items[index];
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}
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/// <summary>
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/// Gets all items overlapping with the specified item in memory.
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/// </summary>
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/// <param name="item">Item to check for overlaps</param>
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/// <param name="output">Output array where matches will be written. It is automatically resized to fit the results</param>
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/// <returns>The number of overlapping items found</returns>
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public int FindOverlaps(T item, ref T[] output)
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{
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return FindOverlaps(item.Address, item.Size, ref output);
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}
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/// <summary>
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/// Gets all items on the list overlapping the specified memory range.
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/// </summary>
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/// <param name="address">Start address of the range</param>
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/// <param name="size">Size in bytes of the range</param>
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/// <param name="output">Output array where matches will be written. It is automatically resized to fit the results</param>
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/// <returns>The number of overlapping items found</returns>
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public int FindOverlaps(ulong address, ulong size, ref T[] output)
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{
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int outputIndex = 0;
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ulong endAddress = address + size;
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lock (_items)
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{
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foreach (T item in _items)
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{
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if (item.Address >= endAddress)
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{
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break;
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}
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if (item.OverlapsWith(address, size))
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{
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if (outputIndex == output.Length)
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{
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Array.Resize(ref output, outputIndex + ArrayGrowthSize);
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}
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output[outputIndex++] = item;
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}
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}
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}
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return outputIndex;
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}
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/// <summary>
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/// Gets all items overlapping with the specified item in memory.
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/// </summary>
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/// <remarks>
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/// This method only returns correct results if none of the items on the list overlaps with
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/// each other. If that is not the case, this method should not be used.
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/// This method is faster than the regular method to find all overlaps.
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/// </remarks>
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/// <param name="item">Item to check for overlaps</param>
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/// <param name="output">Output array where matches will be written. It is automatically resized to fit the results</param>
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/// <returns>The number of overlapping items found</returns>
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public int FindOverlapsNonOverlapping(T item, ref T[] output)
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{
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return FindOverlapsNonOverlapping(item.Address, item.Size, ref output);
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}
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/// <summary>
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/// Gets all items on the list overlapping the specified memory range.
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/// </summary>
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/// <remarks>
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/// This method only returns correct results if none of the items on the list overlaps with
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/// each other. If that is not the case, this method should not be used.
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/// This method is faster than the regular method to find all overlaps.
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/// </remarks>
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/// <param name="address">Start address of the range</param>
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/// <param name="size">Size in bytes of the range</param>
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/// <param name="output">Output array where matches will be written. It is automatically resized to fit the results</param>
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/// <returns>The number of overlapping items found</returns>
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public int FindOverlapsNonOverlapping(ulong address, ulong size, ref T[] output)
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{
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// This is a bit faster than FindOverlaps, but only works
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// when none of the items on the list overlaps with each other.
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int outputIndex = 0;
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int index = BinarySearch(address, size);
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if (index >= 0)
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{
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while (index > 0 && _items[index - 1].OverlapsWith(address, size))
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{
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index--;
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}
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do
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{
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if (outputIndex == output.Length)
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{
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Array.Resize(ref output, outputIndex + ArrayGrowthSize);
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}
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output[outputIndex++] = _items[index++];
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}
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while (index < _items.Count && _items[index].OverlapsWith(address, size));
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}
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return outputIndex;
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}
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/// <summary>
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/// Gets all items on the list with the specified memory address.
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/// </summary>
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/// <param name="address">Address to find</param>
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/// <param name="output">Output array where matches will be written. It is automatically resized to fit the results</param>
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/// <returns>The number of matches found</returns>
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public int FindOverlaps(ulong address, ref T[] output)
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{
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int index = BinarySearch(address);
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int outputIndex = 0;
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if (index >= 0)
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{
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while (index > 0 && _items[index - 1].Address == address)
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{
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index--;
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}
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while (index < _items.Count)
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{
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T overlap = _items[index++];
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if (overlap.Address != address)
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{
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break;
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}
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if (outputIndex == output.Length)
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{
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Array.Resize(ref output, outputIndex + ArrayGrowthSize);
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}
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output[outputIndex++] = overlap;
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}
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}
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return outputIndex;
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}
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/// <summary>
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/// Performs binary search on the internal list of items.
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/// </summary>
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/// <param name="address">Address to find</param>
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/// <returns>List index of the item, or complement index of nearest item with lower value on the list</returns>
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private int BinarySearch(ulong address)
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{
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int left = 0;
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int right = _items.Count - 1;
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while (left <= right)
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{
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int range = right - left;
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int middle = left + (range >> 1);
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T item = _items[middle];
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if (item.Address == address)
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{
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return middle;
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}
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if (address < item.Address)
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{
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right = middle - 1;
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}
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else
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{
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left = middle + 1;
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}
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}
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return ~left;
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}
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/// <summary>
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/// Performs binary search for items overlapping a given memory range.
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/// </summary>
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/// <param name="address">Start address of the range</param>
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/// <param name="size">Size in bytes of the range</param>
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/// <returns>List index of the item, or complement index of nearest item with lower value on the list</returns>
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private int BinarySearch(ulong address, ulong size)
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{
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int left = 0;
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int right = _items.Count - 1;
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while (left <= right)
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{
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int range = right - left;
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int middle = left + (range >> 1);
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T item = _items[middle];
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if (item.OverlapsWith(address, size))
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{
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return middle;
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}
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if (address < item.Address)
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{
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right = middle - 1;
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}
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else
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{
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left = middle + 1;
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}
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}
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return ~left;
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}
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public IEnumerator<T> GetEnumerator()
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{
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return _items.GetEnumerator();
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return _items.GetEnumerator();
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}
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}
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} |