public override void Create(TypeBuilder typeBuilder)
{
var il = this.BuildMethod(typeBuilder);
var localContext = this.BuildContext(il);
if (MethodInfo.ReturnType != typeof(void)) // has return value
{
localReturnValue = il.DeclareLocal(MethodInfo.ReturnType);
}
//将拦截器放到数组中，可以提取键值放缓存，此处做法是序列化后放入数据
this.LoadHandlers(il, localContext);
#region BeginInvoke
this.BeginInvoke(il, localContext);
DoLog(il, "-----------bool");
LocalBuilder localFlag = il.DeclareLocal(typeof(bool));
DoLog(il, "-----------FlowBehavior");
LocalBuilder localFlow = il.DeclareLocal(typeof(FlowBehavior));
Label lblEnd = il.DefineLabel();
//如果有返回值 Return
if (MethodInfo.ReturnType != typeof(void) && localReturnValue != null)
{
Label lblReturn1 = il.DefineLabel();
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_FlowBehavior"), new[] { typeof(FlowBehavior) });
il.Emit(OpCodes.Stloc, localFlow);
il.Emit(OpCodes.Ldloc, localFlow);
il.Emit(OpCodes.Ldc_I4, (int)FlowBehavior.Return);
il.Emit(OpCodes.Ceq);
il.Emit(OpCodes.Stloc, localFlag);
il.Emit(OpCodes.Ldloc, localFlag);
//指定了新的返回值
il.Emit(OpCodes.Brfalse, lblReturn1);
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_ReturnValueOrTask", INTERNAL_ATTRIBUTES), new[] { typeof(object) });
if (MethodInfo.ReturnType.IsValueType || MethodInfo.ReturnType.IsGenericParameter || MethodInfo.ReturnType.IsGenericType)
{
il.Emit(OpCodes.Unbox_Any, MethodInfo.ReturnType);
}
else
{
il.Emit(OpCodes.Castclass, MethodInfo.ReturnType);
}
il.Emit(OpCodes.Stloc, localReturnValue);
il.Emit(OpCodes.Br, lblEnd);
il.MarkLabel(lblReturn1);
}
#endregion
#region 执行基类方法
DoLog(il, "-----------开始执行基类方法");
il.Emit(OpCodes.Ldarg_0);
if (FieldCore != null)
{
il.Emit(OpCodes.Ldfld, FieldCore);
}
for (int i = 0; i < parameterTypes.Length; ++i)
{
LoadArgument(il, i + 1);
}
il.Emit(OpCodes.Call, MethodInfo);
DoLog(il, "-----------执行基类方法完成");
#endregion
#region 如果有返回值，将返回值存到方法上下文中
if (MethodInfo.ReturnType != typeof(void) && localReturnValue != null)
{
il.Emit(OpCodes.Stloc, localReturnValue);
il.Emit(OpCodes.Ldloc, localContext);
il.Emit(OpCodes.Ldloc, localReturnValue);
if (MethodInfo.ReturnType.IsValueType || MethodInfo.ReturnType.IsGenericParameter || MethodInfo.ReturnType.IsGenericType)
{
il.Emit(OpCodes.Box, MethodInfo.ReturnType);
}
il.Emit(OpCodes.Ldc_I4, emitTryCatch ? 1 : 0);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("SetReturnValue", INTERNAL_ATTRIBUTES), new[] { typeof(object), typeof(bool) });
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_ReturnValueOrTask", INTERNAL_ATTRIBUTES), new[] { typeof(object) });
if (MethodInfo.ReturnType.IsValueType || MethodInfo.ReturnType.IsGenericParameter || MethodInfo.ReturnType.IsGenericType)
{
il.Emit(OpCodes.Unbox_Any, MethodInfo.ReturnType);
}
il.Emit(OpCodes.Stloc, localReturnValue);
il.MarkLabel(lblEnd);
il.Emit(OpCodes.Ldloc, localReturnValue);
}
#endregion
DoLog(il, "-----------方法执行结束");
il.Emit(OpCodes.Ret);
}
public override void Create(TypeBuilder typeBuilder)
{
var il = this.BuildMethod(typeBuilder);
var localContext = this.BuildContext(il);
if (MethodInfo.ReturnType != typeof(void)) // has return value
{
localReturnValue = il.DeclareLocal(MethodInfo.ReturnType);
}
//将拦截器放到数组中，可以提取键值放缓存，此处做法是序列化后放入数据
this.LoadHandlers(il, localContext);
#region BeginInvoke
this.BeginInvoke(il, localContext);
LocalBuilder localFlag = il.DeclareLocal(typeof(bool));
LocalBuilder localFlow = il.DeclareLocal(typeof(FlowBehavior));
Label lblEnd = il.DefineLabel();
//如果有返回值 Return
if (MethodInfo.ReturnType != typeof(void) && localReturnValue != null)
{
Label lblReturn1 = il.DefineLabel();
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_FlowBehavior"), new[] { typeof(FlowBehavior) });
il.Emit(OpCodes.Stloc, localFlow);
il.Emit(OpCodes.Ldloc, localFlow);
il.Emit(OpCodes.Ldc_I4, (int)FlowBehavior.Return);
il.Emit(OpCodes.Ceq);
il.Emit(OpCodes.Stloc, localFlag);
il.Emit(OpCodes.Ldloc, localFlag);
//指定了新的返回值
il.Emit(OpCodes.Brfalse, lblReturn1);
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_ReturnValueOrTask", INTERNAL_ATTRIBUTES), new[] { typeof(object) });
if (MethodInfo.ReturnType.IsValueType || MethodInfo.ReturnType.IsGenericParameter || MethodInfo.ReturnType.IsGenericType)
{
il.Emit(OpCodes.Unbox_Any, MethodInfo.ReturnType);
}
else
{
il.Emit(OpCodes.Castclass, MethodInfo.ReturnType);
}
il.Emit(OpCodes.Stloc, localReturnValue);
il.Emit(OpCodes.Br, lblEnd);
il.MarkLabel(lblReturn1);
}
#endregion
// 如果有异常拦截器，开始try模块
if (emitTryCatch)
{
il.BeginExceptionBlock(); // try {
il.Emit(OpCodes.Ldloc, localContext);
}
#region 执行基类方法
DoLog(il, "-----------开始执行基类方法");
il.Emit(OpCodes.Ldarg_0);
if (FieldCore != null)
{
il.Emit(OpCodes.Ldfld, FieldCore);
}
for (int i = 0; i < parameterTypes.Length; ++i)
{
LoadArgument(il, i + 1);
}
il.Emit(OpCodes.Call, MethodInfo);
DoLog(il, "-----------执行基类方法完成");
#endregion
#region 如果有返回值，将返回值存到方法上下文中
if (MethodInfo.ReturnType != typeof(void) && localReturnValue != null)
{
il.Emit(OpCodes.Stloc, localReturnValue);
il.Emit(OpCodes.Ldloc, localContext);
il.Emit(OpCodes.Ldloc, localReturnValue);
if (MethodInfo.ReturnType.IsValueType || MethodInfo.ReturnType.IsGenericParameter || MethodInfo.ReturnType.IsGenericType)
{
il.Emit(OpCodes.Box, MethodInfo.ReturnType);
}
il.Emit(OpCodes.Ldc_I4, emitTryCatch ? 1 : 0);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("SetReturnValue", INTERNAL_ATTRIBUTES), new[] { typeof(object), typeof(bool) });
}
#endregion
this.EndInvoke(il, localContext);
//如果有异常拦截器，开始catch模块
if (emitTryCatch)
{
LocalBuilder localException = il.DeclareLocal(typeof(Exception));
il.BeginCatchBlock(typeof(Exception)); // } catch {
#region 储存异常信息到方法上下文中
il.Emit(OpCodes.Stloc, localException);
il.Emit(OpCodes.Ldloc, localContext);
il.Emit(OpCodes.Ldloc, localException);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("set_Exception", INTERNAL_ATTRIBUTES), new[] { typeof(Exception) });
#endregion
this.OnException(il, localContext);
#region FlowBehavior 处理异常
Label lblRethrow = il.DefineLabel();
Label lblThrow = il.DefineLabel();
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_FlowBehavior"), new[] { typeof(FlowBehavior) });
il.Emit(OpCodes.Stloc, localFlow);
//重新抛出异常 Rethrow
il.Emit(OpCodes.Ldloc, localFlow);
il.Emit(OpCodes.Ldc_I4, (int)FlowBehavior.RethrowException);
il.Emit(OpCodes.Ceq);
il.Emit(OpCodes.Stloc, localFlag);
il.Emit(OpCodes.Ldloc, localFlag);
il.Emit(OpCodes.Brfalse, lblRethrow);
il.Emit(OpCodes.Rethrow);
il.MarkLabel(lblRethrow);
//抛出新的异常 Throw
il.Emit(OpCodes.Ldloc, localFlow);
il.Emit(OpCodes.Ldc_I4, (int)FlowBehavior.ThrowException);
il.Emit(OpCodes.Ceq);
il.Emit(OpCodes.Stloc, localFlag);
il.Emit(OpCodes.Ldloc, localFlag);
il.Emit(OpCodes.Brfalse, lblThrow);
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("NewException", INTERNAL_ATTRIBUTES), new[] { typeof(Exception) });
il.Emit(OpCodes.Throw);
il.MarkLabel(lblThrow);
//如果有返回值 Return
if (MethodInfo.ReturnType != typeof(void) && localReturnValue != null)
{
Label lblReturn = il.DefineLabel();
Label lblDefault = il.DefineLabel();
il.Emit(OpCodes.Ldloc, localFlow);
il.Emit(OpCodes.Ldc_I4, (int)FlowBehavior.Return);
il.Emit(OpCodes.Ceq);
il.Emit(OpCodes.Stloc, localFlag);
il.Emit(OpCodes.Ldloc, localFlag);
//指定了新的返回值
il.Emit(OpCodes.Brfalse, lblReturn);
il.Emit(OpCodes.Ldloc, localContext);
il.EmitCall(OpCodes.Call, METHOD_CONTEXT_TYPE.GetMethod("get_ReturnValueOrTask", INTERNAL_ATTRIBUTES), new[] { typeof(object) });
if (MethodInfo.ReturnType.IsValueType || MethodInfo.ReturnType.IsGenericParameter || MethodInfo.ReturnType.IsGenericType)
{
il.Emit(OpCodes.Unbox_Any, MethodInfo.ReturnType);
}
else
{
il.Emit(OpCodes.Castclass, MethodInfo.ReturnType);
}
il.Emit(OpCodes.Stloc, localReturnValue);
il.Emit(OpCodes.Br, lblDefault);
il.MarkLabel(lblReturn);
//返回默认值
if (MethodInfo.ReturnType.IsValueType)
{
var local = il.DeclareLocal(MethodInfo.ReturnType);
il.Emit(OpCodes.Ldloca, local);
il.Emit(OpCodes.Initobj, MethodInfo.ReturnType);
il.Emit(OpCodes.Ldloc, local);
il.Emit(OpCodes.Stloc, localReturnValue);
}
else
{
LoadNullOrEmptyTask(il, MethodInfo.ReturnType);
//il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Stloc, localReturnValue);
}
il.MarkLabel(lblDefault);
}
#endregion
il.EndExceptionBlock(); // }
}
// 如果方法有返回值，将返回值返回
il.MarkLabel(lblEnd);
if (MethodInfo.ReturnType != typeof(void) && localReturnValue != null)
{
il.Emit(OpCodes.Ldloc, localReturnValue);
}
il.Emit(OpCodes.Ret);
}
