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Reduce usage of Marshal.PtrToStructure and Marshal.StructureToPtr (#3805)

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* common: Make BinaryReaderExtensions Read & Write take unamanged types

This allows us to not rely on Marshal.PtrToStructure and Marshal.StructureToPtr for those.

* common: Make MemoryHelper Read & Write takes unamanged types

* Update Marshal.SizeOf => Unsafe.SizeOf when appropriate and start moving software applet to unmanaged types
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Mary-nyan 2022-11-24 15:26:29 +01:00 • committed by GitHub
parent a1ddaa2736
commit f4e879a1e6
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16 changed files with 88 additions and 137 deletions
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27
Ryujinx.Cpu/MemoryHelper.cs
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@ -1,6 +1,7 @@
using Ryujinx.Memory;
using System;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
@ -23,34 +24,18 @@ namespace Ryujinx.Cpu
}
}
public unsafe static T Read<T>(IVirtualMemoryManager memory, ulong position) where T : struct
public unsafe static T Read<T>(IVirtualMemoryManager memory, ulong position) where T : unmanaged
{
long size = Marshal.SizeOf<T>();
byte[] data = new byte[size];
memory.Read(position, data);
fixed (byte* ptr = data)
{
return Marshal.PtrToStructure<T>((IntPtr)ptr);
}
return MemoryMarshal.Cast<byte, T>(memory.GetSpan(position, Unsafe.SizeOf<T>()))[0];
}
public unsafe static ulong Write<T>(IVirtualMemoryManager memory, ulong position, T value) where T : struct
public unsafe static ulong Write<T>(IVirtualMemoryManager memory, ulong position, T value) where T : unmanaged
{
long size = Marshal.SizeOf<T>();
byte[] data = new byte[size];
fixed (byte* ptr = data)
{
Marshal.StructureToPtr<T>(value, (IntPtr)ptr, false);
}
ReadOnlySpan<byte> data = MemoryMarshal.Cast<T, byte>(MemoryMarshal.CreateReadOnlySpan(ref value, 1));
memory.Write(position, data);
return (ulong)size;
return (ulong)data.Length;
}
public static string ReadAsciiString(IVirtualMemoryManager memory, ulong position, long maxSize = -1)