IPC refactor part 3+4: New server HIPC message processor (#4188)

* IPC refactor part 3 + 4: New server HIPC message processor with source generator based serialization

* Make types match on calls to AlignUp/AlignDown

* Formatting

* Address some PR feedback

* Move BitfieldExtensions to Ryujinx.Common.Utilities and consolidate implementations

* Rename Reader/Writer to SpanReader/SpanWriter and move to Ryujinx.Common.Memory

* Implement EventType

* Address more PR feedback

* Log request processing errors since they are not normal

* Rename waitable to multiwait and add missing lock

* PR feedback

* Ac_K PR feedback

Ryujinx.Horizon/Sm/Impl/ServiceManager.cs

@@ -0,0 +1,197 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.OsTypes;
+using Ryujinx.Horizon.Sdk.Sf;
+using Ryujinx.Horizon.Sdk.Sm;
+
+namespace Ryujinx.Horizon.Sm.Impl
+{
+    class ServiceManager
+    {
+        private const int MaxServicesCount = 256;
+
+        private readonly ServiceInfo[] _services;
+
+        public ServiceManager()
+        {
+            _services = new ServiceInfo[MaxServicesCount];
+        }
+
+        public Result GetService(out int handle, ulong processId, ServiceName name)
+        {
+            handle = 0;
+            Result result = ValidateServiceName(name);
+
+            if (result.IsFailure)
+            {
+                return result;
+            }
+
+            // TODO: Validation with GetProcessInfo etc.
+
+            int serviceIndex = GetServiceInfo(name);
+
+            if (serviceIndex < 0)
+            {
+                return SfResult.RequestDeferredByUser;
+            }
+
+            result = GetServiceImpl(out handle, ref _services[serviceIndex]);
+
+            if (result == KernelResult.SessionCountExceeded)
+            {
+                return SmResult.OutOfSessions;
+            }
+
+            return result;
+        }
+
+        private Result GetServiceImpl(out int handle, ref ServiceInfo serviceInfo)
+        {
+            return HorizonStatic.Syscall.ConnectToPort(out handle, serviceInfo.PortHandle);
+        }
+
+        public Result RegisterService(out int handle, ulong processId, ServiceName name, int maxSessions, bool isLight)
+        {
+            handle = 0;
+            Result result = ValidateServiceName(name);
+
+            if (result.IsFailure)
+            {
+                return result;
+            }
+
+            // TODO: Validation with GetProcessInfo etc.
+
+            if (HasServiceInfo(name))
+            {
+                return SmResult.AlreadyRegistered;
+            }
+
+            return RegisterServiceImpl(out handle, processId, name, maxSessions, isLight);
+        }
+
+        public Result RegisterServiceForSelf(out int handle, ServiceName name, int maxSessions)
+        {
+            return RegisterServiceImpl(out handle, Os.GetCurrentProcessId(), name, maxSessions, false);
+        }
+
+        private Result RegisterServiceImpl(out int handle, ulong processId, ServiceName name, int maxSessions, bool isLight)
+        {
+            handle = 0;
+
+            Result result = ValidateServiceName(name);
+
+            if (!result.IsSuccess)
+            {
+                return result;
+            }
+
+            if (HasServiceInfo(name))
+            {
+                return SmResult.AlreadyRegistered;
+            }
+
+            int freeServiceIndex = GetFreeService();
+
+            if (freeServiceIndex < 0)
+            {
+                return SmResult.OutOfServices;
+            }
+
+            ref ServiceInfo freeService = ref _services[freeServiceIndex];
+
+            result = HorizonStatic.Syscall.CreatePort(out handle, out int clientPort, maxSessions, isLight, null);
+
+            if (!result.IsSuccess)
+            {
+                return result;
+            }
+
+            freeService.PortHandle = clientPort;
+            freeService.Name = name;
+            freeService.OwnerProcessId = processId;
+
+            return Result.Success;
+        }
+
+        public Result UnregisterService(ulong processId, ServiceName name)
+        {
+            Result result = ValidateServiceName(name);
+
+            if (result.IsFailure)
+            {
+                return result;
+            }
+
+            // TODO: Validation with GetProcessInfo etc.
+
+            int serviceIndex = GetServiceInfo(name);
+
+            if (serviceIndex < 0)
+            {
+                return SmResult.NotRegistered;
+            }
+
+            ref var serviceInfo = ref _services[serviceIndex];
+
+            if (serviceInfo.OwnerProcessId != processId)
+            {
+                return SmResult.NotAllowed;
+            }
+
+            serviceInfo.Free();
+            return Result.Success;
+        }
+
+        private static Result ValidateServiceName(ServiceName name)
+        {
+            if (name[0] == 0)
+            {
+                return SmResult.InvalidServiceName;
+            }
+
+            int nameLength = 1;
+
+            for (; nameLength < name.Length; nameLength++)
+            {
+                if (name[nameLength] == 0)
+                {
+                    break;
+                }
+            }
+
+            while (nameLength < name.Length)
+            {
+                if (name[nameLength++] != 0)
+                {
+                    return SmResult.InvalidServiceName;
+                }
+            }
+
+            return Result.Success;
+        }
+
+        private bool HasServiceInfo(ServiceName name)
+        {
+            return GetServiceInfo(name) != -1;
+        }
+
+        private int GetFreeService()
+        {
+            return GetServiceInfo(ServiceName.Invalid);
+        }
+
+        private int GetServiceInfo(ServiceName name)
+        {
+            for (int index = 0; index < MaxServicesCount; index++)
+            {
+                if (_services[index].Name == name)
+                {
+                    return index;
+                }
+            }
+
+            return -1;
+        }
+    }
+}