Ryujinx-uplift/src/Ryujinx.Cpu/VirtualMemoryManagerRefCountedBase.cs
jhorv 5def0429f8
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()
2024-04-04 22:23:03 -03:00

33 lines
755 B
C#

using Ryujinx.Memory;
using System.Diagnostics;
using System.Threading;
namespace Ryujinx.Cpu
{
public abstract class VirtualMemoryManagerRefCountedBase : VirtualMemoryManagerBase, IRefCounted
{
private int _referenceCount;
public void IncrementReferenceCount()
{
int newRefCount = Interlocked.Increment(ref _referenceCount);
Debug.Assert(newRefCount >= 1);
}
public void DecrementReferenceCount()
{
int newRefCount = Interlocked.Decrement(ref _referenceCount);
Debug.Assert(newRefCount >= 0);
if (newRefCount == 0)
{
Destroy();
}
}
protected abstract void Destroy();
}
}