Added more of the structure for GeneratedStore

IPA.Loader/Config/IConfigStore.cs

@@ -35,6 +35,10 @@ namespace IPA.Config
         /// Writes the config structure stored by the current <see cref="IConfigStore"/> to the given
         /// <see cref="IConfigProvider"/>.
         /// </summary>
+        /// <remarks>
+        /// The calling code will have entered a read lock on <see cref="WriteSyncObject"/> when
+        /// this is called.
+        /// </remarks>
         /// <param name="provider">the provider to write to</param>
         void WriteTo(IConfigProvider provider);
 
@@ -42,7 +46,11 @@ namespace IPA.Config
         /// Reads the config structure from the given <see cref="IConfigProvider"/> into the current 
         /// <see cref="IConfigStore"/>.
         /// </summary>
-        /// <param name="provider"></param>
+        /// <remarks>
+        /// The calling code will have entered a write lock on <see cref="WriteSyncObject"/> when
+        /// this is called.
+        /// </remarks>
+        /// <param name="provider">the provider to read from</param>
         void ReadFrom(IConfigProvider provider);
 
     }

IPA.Loader/Config/Stores/GeneratedStore.cs

@@ -1,35 +1,206 @@
-using System;
+using IPA.Config.Data;
+using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
+using System.Reflection.Emit;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
 namespace IPA.Config.Stores
 {
-    internal class GeneratedStore
+    internal static class GeneratedStore
     {
+        private interface IGeneratedStore
+        {
+            /// <summary>
+            /// serializes/deserializes to Value
+            /// </summary>
+            Value Values { get; set; }
+            Type Type { get; }
+            IGeneratedStore Parent { get; }
+            Impl Impl { get; }
+        }
+
         private class Impl : IConfigStore
         {
-            public WaitHandle SyncObject { get; private set; } = new AutoResetEvent(false);
+            private IGeneratedStore generated;
+
+            internal static ConstructorInfo Ctor = typeof(Impl).GetConstructor(new[] { typeof(IGeneratedStore) });
+            public Impl(IGeneratedStore store) => generated = store;
+
+            private readonly AutoResetEvent resetEvent = new AutoResetEvent(false);
+            public WaitHandle SyncObject => resetEvent;
+
+            public ReaderWriterLockSlim WriteSyncObject { get; } = new ReaderWriterLockSlim();
+
+            internal static MethodInfo ImplSignalChangedMethod = typeof(Impl).GetMethod(nameof(ImplSignalChanged));
+            internal static void ImplSignalChanged(IGeneratedStore s) => FindImpl(s).SignalChanged();
+            internal void SignalChanged() => resetEvent.Set(); 
+
+            internal static MethodInfo ImplTakeReadMethod = typeof(Impl).GetMethod(nameof(ImplTakeRead));
+            internal static void ImplTakeRead(IGeneratedStore s) => FindImpl(s).TakeRead();
+            internal void TakeRead() => WriteSyncObject.EnterReadLock();
+
+            internal static MethodInfo ImplReleaseReadMethod = typeof(Impl).GetMethod(nameof(ImplReleaseRead));
+            internal static void ImplReleaseRead(IGeneratedStore s) => FindImpl(s).ReleaseRead();
+            internal void ReleaseRead() => WriteSyncObject.ExitWriteLock();
+
+            internal static MethodInfo ImplTakeWriteMethod = typeof(Impl).GetMethod(nameof(ImplTakeWrite));
+            internal static void ImplTakeWrite(IGeneratedStore s) => FindImpl(s).TakeWrite();
+            internal void TakeWrite() => WriteSyncObject.EnterWriteLock();
+
+            internal static MethodInfo ImplReleaseWriteMethod = typeof(Impl).GetMethod(nameof(ImplReleaseWrite));
+            internal static void ImplReleaseWrite(IGeneratedStore s) => FindImpl(s).ReleaseWrite();
+            internal void ReleaseWrite() => WriteSyncObject.ExitWriteLock();
+
+            internal static MethodInfo FindImplMethod = typeof(Impl).GetMethod(nameof(FindImpl));
+            internal static Impl FindImpl(IGeneratedStore store)
+            {
+                while (store != null) store = store.Parent; // walk to the top of the tree
+                return store?.Impl;
+            }
+
 
-            public ReaderWriterLockSlim WriteSyncObject => throw new NotImplementedException();
 
+            internal static MethodInfo ReadFromMethod = typeof(Impl).GetMethod(nameof(ReadFrom));
             public void ReadFrom(IConfigProvider provider)
             {
-                throw new NotImplementedException();
+                // TODO: implement
             }
 
+            internal static MethodInfo WriteToMethod = typeof(Impl).GetMethod(nameof(WriteTo));
             public void WriteTo(IConfigProvider provider)
             {
-                throw new NotImplementedException();
+                var values = generated.Values;
+                // TODO: implement
             }
         }
 
-        public static T Create<T>() => (T)Create(typeof(T));
+        private static Dictionary<Type, Func<IGeneratedStore, IConfigStore>> generatedCreators = new Dictionary<Type, Func<IGeneratedStore, IConfigStore>>();
+        private static Dictionary<Type, Dictionary<string, Type>> memberMaps = new Dictionary<Type, Dictionary<string, Type>>();
 
-        public static IConfigStore Create(Type type)
+        public static T Create<T>() where T : class => (T)Create(typeof(T));
+
+        public static IConfigStore Create(Type type) => Create(type, null);
+
+        private static IConfigStore Create(Type type, IGeneratedStore parent)
+        {
+            if (generatedCreators.TryGetValue(type, out var creator))
+                return creator(parent);
+            else
+            {
+                creator = MakeCreator(type);
+                generatedCreators.Add(type, creator);
+                return creator(parent);
+            }
+        }
+
+        private static AssemblyBuilder assembly = null;
+        private static AssemblyBuilder Assembly
         {
+            get
+            {
+                if (assembly == null)
+                {
+                    var name = new AssemblyName("IPA.Config.Generated");
+                    assembly = AppDomain.CurrentDomain.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run);
+                }
+
+                return assembly;
+            }
+        }
+        private static ModuleBuilder module = null;
+        private static ModuleBuilder Module
+        {
+            get
+            {
+                if (module == null)
+                    module = Assembly.DefineDynamicModule(Assembly.GetName().Name);
+
+                return module;
+            }
+        }
+
+        private static Func<IGeneratedStore, IConfigStore> MakeCreator(Type type)
+        {
+            var typeBuilder = Module.DefineType($"{type.FullName}.Generated", 
+                TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.Class, type);
+
+            var typeField = typeBuilder.DefineField("<>_type", typeof(Type), FieldAttributes.Private | FieldAttributes.InitOnly);
+            var implField = typeBuilder.DefineField("<>_impl", typeof(Impl), FieldAttributes.Private | FieldAttributes.InitOnly);
+            var parentField = typeBuilder.DefineField("<>_parent", typeof(IGeneratedStore), FieldAttributes.Private | FieldAttributes.InitOnly);
+
+            const MethodAttributes propertyMethodAttr = MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig;
+
+            #region IGeneratedStore
+            typeBuilder.AddInterfaceImplementation(typeof(IGeneratedStore));
+
+            #region IGeneratedStore.Impl
+            var implProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Impl), PropertyAttributes.None, typeof(Impl), null);
+            var implPropGet = typeBuilder.DefineMethod($"get_{nameof(IGeneratedStore.Impl)}", propertyMethodAttr, implProp.PropertyType, Type.EmptyTypes);
+            implProp.SetGetMethod(implPropGet);
+
+            {
+                var il = implPropGet.GetILGenerator();
+
+                il.Emit(OpCodes.Ldarg_0); // load this
+                il.Emit(OpCodes.Ldfld, implField); // load impl field
+                il.Emit(OpCodes.Ret);
+            }
+            #endregion
+            #region IGeneratedStore.Type
+            var typeProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Type), PropertyAttributes.None, typeof(Type), null);
+            var typePropGet = typeBuilder.DefineMethod($"get_{nameof(IGeneratedStore.Type)}", propertyMethodAttr, typeProp.PropertyType, Type.EmptyTypes);
+            typeProp.SetGetMethod(typePropGet);
+
+            {
+                var il = typePropGet.GetILGenerator();
+
+                il.Emit(OpCodes.Ldarg_0); // load this
+                il.Emit(OpCodes.Ldfld, typeField); // load impl field
+                il.Emit(OpCodes.Ret);
+            }
+            #endregion
+            #region IGeneratedStore.Parent
+            var parentProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Parent), PropertyAttributes.None, typeof(IGeneratedStore), null);
+            var parentPropGet = typeBuilder.DefineMethod($"get_{nameof(IGeneratedStore.Parent)}", propertyMethodAttr, parentProp.PropertyType, Type.EmptyTypes);
+            parentProp.SetGetMethod(parentPropGet);
+
+            {
+                var il = parentPropGet.GetILGenerator();
+
+                il.Emit(OpCodes.Ldarg_0); // load this
+                il.Emit(OpCodes.Ldfld, parentField); // load impl field
+                il.Emit(OpCodes.Ret);
+            }
+            #endregion
+            #region IGeneratedStore.Values
+            var valuesProp = typeBuilder.DefineProperty(nameof(IGeneratedStore.Values), PropertyAttributes.None, typeof(Value), null);
+            var valuesPropGet = typeBuilder.DefineMethod($"get_{nameof(IGeneratedStore.Values)}", propertyMethodAttr, valuesProp.PropertyType, Type.EmptyTypes);
+            var valuesPropSet = typeBuilder.DefineMethod($"set_{nameof(IGeneratedStore.Values)}", propertyMethodAttr, null, new[] { valuesProp.PropertyType });
+            valuesProp.SetGetMethod(valuesPropGet);
+            valuesProp.SetSetMethod(valuesPropSet);
+
+            { // this is non-locking because the only code that will call this will already own the correct lock
+                var il = valuesPropGet.GetILGenerator();
+
+                // TODO: implement get_Values
+                il.Emit(OpCodes.Ldnull);
+
+                il.Emit(OpCodes.Ret);
+            }
+
+            { // this is non-locking because the only code that will call this will already own the correct lock
+                var il = valuesPropSet.GetILGenerator();
+
+                // TODO: implement set_Values
+
+                il.Emit(OpCodes.Ret);
+            }
+            #endregion
+            #endregion
 
             return null;
         }