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

* 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

7 files changed, 43 insertions, 36 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/FriendService/Types/UserPresence.cs b/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/FriendService/Types/UserPresence.cs
index e7568a4a..058c5646 100644
--- a/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/FriendService/Types/UserPresence.cs
+++ b/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/FriendService/Types/UserPresence.cs
@@ -1,9 +1,12 @@
-using Ryujinx.HLE.HOS.Services.Account.Acc;
+using Ryujinx.Common.Memory;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
+using System;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace Ryujinx.HLE.HOS.Services.Friend.ServiceCreator.FriendService
 {
-    [StructLayout(LayoutKind.Sequential, Pack = 0x8, CharSet = CharSet.Ansi)]
+    [StructLayout(LayoutKind.Sequential, Pack = 0x8)]
     struct UserPresence
     {
         public UserId         UserId;
@@ -13,15 +16,20 @@ namespace Ryujinx.HLE.HOS.Services.Friend.ServiceCreator.FriendService
         [MarshalAs(UnmanagedType.I1)]
         public bool SamePresenceGroupApplication;
 
-        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x3)]
-        public char[] Unknown;
+        public Array3<byte> Unknown;
+        private AppKeyValueStorageHolder _appKeyValueStorage;
 
-        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0xC0)]
-        public char[] AppKeyValueStorage;
+        public Span<byte> AppKeyValueStorage => MemoryMarshal.Cast<AppKeyValueStorageHolder, byte>(MemoryMarshal.CreateSpan(ref _appKeyValueStorage, AppKeyValueStorageHolder.Size));
+
+        [StructLayout(LayoutKind.Sequential, Pack = 0x1, Size = Size)]
+        private struct AppKeyValueStorageHolder
+        {
+            public const int Size = 0xC0;
+        }
 
         public override string ToString()
         {
-            return $"UserPresence {{ UserId: {UserId}, LastTimeOnlineTimestamp: {LastTimeOnlineTimestamp}, Status: {Status}, AppKeyValueStorage: {AppKeyValueStorage} }}";
+            return $"UserPresence {{ UserId: {UserId}, LastTimeOnlineTimestamp: {LastTimeOnlineTimestamp}, Status: {Status}, AppKeyValueStorage: {Encoding.ASCII.GetString(AppKeyValueStorage)} }}";
         }
     }
 }
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/IFriendService.cs b/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/IFriendService.cs
index ec947414..8159d091 100644
--- a/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/IFriendService.cs
+++ b/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/IFriendService.cs
@@ -236,23 +236,14 @@ namespace Ryujinx.HLE.HOS.Services.Friend.ServiceCreator
             ulong position = context.Request.PtrBuff[0].Position;
             ulong size     = context.Request.PtrBuff[0].Size;
 
-            byte[] bufferContent = new byte[size];
-
-            context.Memory.Read(position, bufferContent);
+            ReadOnlySpan<UserPresence> userPresenceInputArray = MemoryMarshal.Cast<byte, UserPresence>(context.Memory.GetSpan(position, (int)size));
 
             if (uuid.IsNull)
             {
                 return ResultCode.InvalidArgument;
             }
 
-            int elementCount = bufferContent.Length / Marshal.SizeOf<UserPresence>();
-
-            using (BinaryReader bufferReader = new BinaryReader(new MemoryStream(bufferContent)))
-            {
-                UserPresence[] userPresenceInputArray = bufferReader.ReadStructArray<UserPresence>(elementCount);
-
-                Logger.Stub?.PrintStub(LogClass.ServiceFriend, new { UserId = uuid.ToString(), userPresenceInputArray });
-            }
+            Logger.Stub?.PrintStub(LogClass.ServiceFriend, new { UserId = uuid.ToString(), userPresenceInputArray = userPresenceInputArray.ToArray() });
 
             return ResultCode.Success;
         }
diff --git a/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/NotificationService/Types/NotificationInfo.cs b/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/NotificationService/Types/NotificationInfo.cs
index 1bd6f011..e710bf06 100644
--- a/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/NotificationService/Types/NotificationInfo.cs
+++ b/Ryujinx.HLE/HOS/Services/Friend/ServiceCreator/NotificationService/Types/NotificationInfo.cs
@@ -1,15 +1,13 @@
-using System.Runtime.InteropServices;
+using Ryujinx.Common.Memory;
+using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Friend.ServiceCreator.NotificationService
 {
-    [StructLayout(LayoutKind.Sequential, Pack = 0x8, Size = 0x10)]
+    [StructLayout(LayoutKind.Sequential, Size = 0x10)]
     struct NotificationInfo
     {
         public NotificationEventType Type;
-
-        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x4)]
-        public char[] Padding;
-
+        private Array4<byte> _padding;
         public long NetworkUserIdPlaceholder;
     }
 }
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs
index fc6635fa..1d6cc118 100644
--- a/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs
+++ b/Ryujinx.HLE/HOS/Services/Sdb/Pdm/QueryService/QueryPlayStatisticsManager.cs
@@ -5,6 +5,7 @@ using Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService.Types;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService
@@ -75,7 +76,7 @@ namespace Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService
 
             for (int i = 0; i < filteredApplicationPlayStatistics.Count(); i++)
             {
-                MemoryHelper.Write(context.Memory, outputPosition + (ulong)(i * Marshal.SizeOf<ApplicationPlayStatistics>()), filteredApplicationPlayStatistics.ElementAt(i).Value);
+                MemoryHelper.Write(context.Memory, outputPosition + (ulong)(i * Unsafe.SizeOf<ApplicationPlayStatistics>()), filteredApplicationPlayStatistics.ElementAt(i).Value);
             }
 
             context.ResponseData.Write(filteredApplicationPlayStatistics.Count());
diff --git a/Ryujinx.HLE/HOS/Services/Time/Clock/Types/ClockSnapshot.cs b/Ryujinx.HLE/HOS/Services/Time/Clock/Types/ClockSnapshot.cs
index df1f151f..07c1b405 100644
--- a/Ryujinx.HLE/HOS/Services/Time/Clock/Types/ClockSnapshot.cs
+++ b/Ryujinx.HLE/HOS/Services/Time/Clock/Types/ClockSnapshot.cs
@@ -1,4 +1,5 @@
 using Ryujinx.HLE.HOS.Services.Time.TimeZone;
+using System;
 using System.Runtime.InteropServices;
 
 namespace Ryujinx.HLE.HOS.Services.Time.Clock
@@ -16,14 +17,22 @@ namespace Ryujinx.HLE.HOS.Services.Time.Clock
         public CalendarAdditionalInfo NetworkCalendarAdditionalTime;
         public SteadyClockTimePoint   SteadyClockTimePoint;
 
-        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x24)]
-        public char[] LocationName;
+        private LocationNameStorageHolder _locationName;
+
+        public Span<byte> LocationName => MemoryMarshal.Cast<LocationNameStorageHolder, byte>(MemoryMarshal.CreateSpan(ref _locationName, LocationNameStorageHolder.Size));
 
         [MarshalAs(UnmanagedType.I1)]
         public bool   IsAutomaticCorrectionEnabled;
         public byte   Type;
         public ushort Unknown;
 
+
+        [StructLayout(LayoutKind.Sequential, Pack = 1, Size = Size)]
+        private struct LocationNameStorageHolder
+        {
+            public const int Size = 0x24;
+        }
+
         public static ResultCode GetCurrentTime(out long currentTime, SteadyClockTimePoint steadyClockTimePoint, SystemClockContext context)
         {
             currentTime = 0;
diff --git a/Ryujinx.HLE/HOS/Services/Time/IStaticServiceForPsc.cs b/Ryujinx.HLE/HOS/Services/Time/IStaticServiceForPsc.cs
index 441e4267..4f351812 100644
--- a/Ryujinx.HLE/HOS/Services/Time/IStaticServiceForPsc.cs
+++ b/Ryujinx.HLE/HOS/Services/Time/IStaticServiceForPsc.cs
@@ -8,7 +8,9 @@ using Ryujinx.HLE.HOS.Services.Time.TimeZone;
 using System;
 using System.Diagnostics;
 using System.IO;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace Ryujinx.HLE.HOS.Services.Time
 {
@@ -281,7 +283,7 @@ namespace Ryujinx.HLE.HOS.Services.Time
         {
             byte type = context.RequestData.ReadByte();
 
-            context.Response.PtrBuff[0] = context.Response.PtrBuff[0].WithSize((uint)Marshal.SizeOf<ClockSnapshot>());
+            context.Response.PtrBuff[0] = context.Response.PtrBuff[0].WithSize((uint)Unsafe.SizeOf<ClockSnapshot>());
 
             context.RequestData.BaseStream.Position += 7;
 
@@ -372,12 +374,9 @@ namespace Ryujinx.HLE.HOS.Services.Time
                 return result;
             }
 
-            char[] tzName       = deviceLocationName.ToCharArray();
-            char[] locationName = new char[0x24];
-
-            Array.Copy(tzName, locationName, tzName.Length);
+            ReadOnlySpan<byte> tzName = Encoding.ASCII.GetBytes(deviceLocationName);
 
-            clockSnapshot.LocationName = locationName;
+            tzName.CopyTo(clockSnapshot.LocationName);
 
             result = ClockSnapshot.GetCurrentTime(out clockSnapshot.UserTime, currentTimePoint, clockSnapshot.UserContext);
 
@@ -414,7 +413,7 @@ namespace Ryujinx.HLE.HOS.Services.Time
 
         private ClockSnapshot ReadClockSnapshotFromBuffer(ServiceCtx context, IpcPtrBuffDesc ipcDesc)
         {
-            Debug.Assert(ipcDesc.Size == (ulong)Marshal.SizeOf<ClockSnapshot>());
+            Debug.Assert(ipcDesc.Size == (ulong)Unsafe.SizeOf<ClockSnapshot>());
 
             byte[] temp = new byte[ipcDesc.Size];
 
diff --git a/Ryujinx.HLE/HOS/Services/Time/TimeZone/TimeZone.cs b/Ryujinx.HLE/HOS/Services/Time/TimeZone/TimeZone.cs
index 12f6e90d..f7477e97 100644
--- a/Ryujinx.HLE/HOS/Services/Time/TimeZone/TimeZone.cs
+++ b/Ryujinx.HLE/HOS/Services/Time/TimeZone/TimeZone.cs
@@ -5,6 +5,7 @@ using Ryujinx.HLE.Utilities;
 using System;
 using System.Buffers.Binary;
 using System.IO;
+using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Text;
 
@@ -890,14 +891,14 @@ namespace Ryujinx.HLE.HOS.Services.Time.TimeZone
 
             long streamLength = reader.BaseStream.Length;
 
-            if (streamLength < Marshal.SizeOf<TzifHeader>())
+            if (streamLength < Unsafe.SizeOf<TzifHeader>())
             {
                 return false;
             }
 
             TzifHeader header = reader.ReadStruct<TzifHeader>();
 
-            streamLength -= Marshal.SizeOf<TzifHeader>();
+            streamLength -= Unsafe.SizeOf<TzifHeader>();
 
             int ttisGMTCount = Detzcode32(header.TtisGMTCount);
             int ttisSTDCount = Detzcode32(header.TtisSTDCount);