public ExecuteExpression <T> CreateExpressionDelegate <T>(DynamicMethodState methodState, object functionClass)
{
ExecuteExpression <T> expressionDelegate;
Stopwatch stopWatch = new Stopwatch();
Trace.WriteLine("Dynamic dll creation - " + stopWatch.ElapsedMilliseconds.ToString());
stopWatch = new Stopwatch();
stopWatch.Start();
//create
DynamicMethod dynamicMethod = new DynamicMethod("", typeof(T), new Type[] { functionClass.GetType() }, functionClass.GetType());
DynamicILInfo dynamicInfo = dynamicMethod.GetDynamicILInfo();
dynamicMethod.InitLocals = methodState.InitLocals;
SignatureHelper locals = SignatureHelper.GetLocalVarSigHelper();
foreach (int localIndex in methodState.LocalVariables.Keys)
{
LocalVariable localVar = methodState.LocalVariables[localIndex];
locals.AddArgument(localVar.LocalType, localVar.IsPinned);
}
dynamicInfo.SetLocalSignature(locals.GetSignature());
IlTokenResolver tokenResolver = new IlTokenResolver(methodState.TokenOffset.Fields, methodState.TokenOffset.Methods, methodState.TokenOffset.Members, methodState.TokenOffset.Types, methodState.TokenOffset.LiteralStrings);
methodState.CodeBytes = tokenResolver.ResolveCodeTokens(methodState.CodeBytes, dynamicInfo);
dynamicInfo.SetCode(methodState.CodeBytes, methodState.MaxStackSize);
expressionDelegate = (ExecuteExpression <T>)dynamicMethod.CreateDelegate(typeof(ExecuteExpression <T>), functionClass);
stopWatch.Stop();
Trace.WriteLine("Dynamic Method Creation - " + stopWatch.ElapsedMilliseconds.ToString());
return(expressionDelegate);
}
/// <summary>
/// Compiles a DynamicMethodState and returns a delegate.
/// </summary>
/// <typeparam name="R">The return type of the expression</typeparam>
/// <typeparam name="C">The type of the function class</typeparam>
/// <param name="methodState">The serialized version of a method on the functionClass</param>
/// <returns>ExecuteExpression<R, C> - a delegate that calls the compiled expression</returns>
public ExecuteExpression <R, C> CreateExpressionDelegate <R, C>(DynamicMethodState methodState)
{
ExecuteExpression <R, C> expressionDelegate;
//create a dynamic method
DynamicMethod dynamicMethod = new DynamicMethod("_" + Guid.NewGuid().ToString("N"), typeof(R), new Type[] { typeof(C) }, typeof(C));
//get the IL writer for it
DynamicILInfo dynamicInfo = dynamicMethod.GetDynamicILInfo();
//set the properties gathered from the compiled expression
dynamicMethod.InitLocals = methodState.InitLocals;
//set local variables
SignatureHelper locals = SignatureHelper.GetLocalVarSigHelper();
foreach (int localIndex in methodState.LocalVariables.Keys)
{
LocalVariable localVar = methodState.LocalVariables[localIndex];
locals.AddArgument(Type.GetTypeFromHandle(localVar.LocalType), localVar.IsPinned);
}
dynamicInfo.SetLocalSignature(locals.GetSignature());
//resolve any metadata tokens
IlTokenResolver tokenResolver = new IlTokenResolver(methodState.TokenOffset.Fields, methodState.TokenOffset.Methods, methodState.TokenOffset.Types, methodState.TokenOffset.LiteralStrings);
methodState.CodeBytes = tokenResolver.ResolveCodeTokens(methodState.CodeBytes, dynamicInfo);
//set the IL code for the dynamic method
dynamicInfo.SetCode(methodState.CodeBytes, methodState.MaxStackSize);
//create a delegate for fast execution
expressionDelegate = (ExecuteExpression <R, C>)dynamicMethod.CreateDelegate(typeof(ExecuteExpression <R, C>));
return(expressionDelegate);
}