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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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43
Ryujinx.Common/Extensions/BinaryReaderExtensions.cs
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@ -1,5 +1,6 @@
using System;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Common
@ -7,49 +8,15 @@ namespace Ryujinx.Common
public static class BinaryReaderExtensions
{
public unsafe static T ReadStruct<T>(this BinaryReader reader)
where T : struct
where T : unmanaged
{
int size = Marshal.SizeOf<T>();
byte[] data = reader.ReadBytes(size);
fixed (byte* ptr = data)
{
return Marshal.PtrToStructure<T>((IntPtr)ptr);
}
}
public unsafe static T[] ReadStructArray<T>(this BinaryReader reader, int count)
where T : struct
{
int size = Marshal.SizeOf<T>();
T[] result = new T[count];
for (int i = 0; i < count; i++)
{
byte[] data = reader.ReadBytes(size);
fixed (byte* ptr = data)
{
result[i] = Marshal.PtrToStructure<T>((IntPtr)ptr);
}
}
return result;
return MemoryMarshal.Cast<byte, T>(reader.ReadBytes(Unsafe.SizeOf<T>()))[0];
}
public unsafe static void WriteStruct<T>(this BinaryWriter writer, T value)
where T : struct
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));
writer.Write(data);
}