From 5def0429f82c795d820b2307a0301b78dfb1e6b7 Mon Sep 17 00:00:00 2001
From: jhorv <38920027+jhorv@users.noreply.github.com>
Date: Thu, 4 Apr 2024 21:23:03 -0400
Subject: Add support to IVirtualMemoryManager for zero-copy reads (#6251)

* - WritableRegion: enable wrapping IMemoryOwner<byte>
- IVirtualMemoryManager impls of GetWritableRegion() use pooled memory when region is non-contiguous.
- IVirtualMemoryManager: add GetReadOnlySequence() and impls
- ByteMemoryPool: add new method RentCopy()
- ByteMemoryPool: make class static, remove ctor and singleton field from earlier impl

* - BytesReadOnlySequenceSegment: move from Ryujinx.Common.Memory to Ryujinx.Memory
- BytesReadOnlySequenceSegment: add IsContiguousWith() and Replace() methods
- VirtualMemoryManagerBase:
  - remove generic type parameters, instead use ulong for virtual addresses and nuint for host/physical addresses
  - implement IWritableBlock
  - add virtual GetReadOnlySequence() with coalescing of contiguous segments
  - add virtual GetSpan()
  - add virtual GetWritableRegion()
  - add abstract IsMapped()
  - add virtual MapForeign(ulong, nuint, ulong)
  - add virtual Read<T>()
  - add virtual Read(ulong, Span<byte>)
  - add virtual ReadTracked<T>()
  - add virtual SignalMemoryTracking()
  - add virtual Write()
  - add virtual Write<T>()
  - add virtual WriteUntracked()
  - add virtual WriteWithRedundancyCheck()
- VirtualMemoryManagerRefCountedBase: remove generic type parameters
- AddressSpaceManager: remove redundant methods, add required overrides
- HvMemoryManager: remove redundant methods, add required overrides, add overrides for _invalidAccessHandler handling
- MemoryManager: remove redundant methods, add required overrides, add overrides for _invalidAccessHandler handling
- MemoryManagerHostMapped: remove redundant methods, add required overrides, add overrides for _invalidAccessHandler handling
- NativeMemoryManager: add get properties for Pointer and Length
- throughout: removed invalid <inheritdoc/> comments

* make HvMemoryManager class sealed

* remove unused method

* adjust MemoryManagerHostTracked

* let MemoryManagerHostTracked override WriteImpl()
---
 src/Ryujinx.Tests.Memory/MockVirtualMemoryManager.cs | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/Ryujinx.Tests.Memory/MockVirtualMemoryManager.cs')

diff --git a/src/Ryujinx.Tests.Memory/MockVirtualMemoryManager.cs b/src/Ryujinx.Tests.Memory/MockVirtualMemoryManager.cs
index 85a1ac02..15e7d9b8 100644
--- a/src/Ryujinx.Tests.Memory/MockVirtualMemoryManager.cs
+++ b/src/Ryujinx.Tests.Memory/MockVirtualMemoryManager.cs
@@ -1,6 +1,7 @@
 using Ryujinx.Memory;
 using Ryujinx.Memory.Range;
 using System;
+using System.Buffers;
 using System.Collections.Generic;
 
 namespace Ryujinx.Tests.Memory
@@ -57,6 +58,11 @@ namespace Ryujinx.Tests.Memory
             throw new NotImplementedException();
         }
 
+        public ReadOnlySequence<byte> GetReadOnlySequence(ulong va, int size, bool tracked = false)
+        {
+            throw new NotImplementedException();
+        }
+
         public ReadOnlySpan<byte> GetSpan(ulong va, int size, bool tracked = false)
         {
             throw new NotImplementedException();
-- 
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