public static FastFieldGetter GetFieldGetter(FieldInfo fieldInfo)
{
FastFieldGetter res;
if (getterCache.TryGetValue(fieldInfo, out res))
{
return(res);
}
lock (getterCache)
{
DynamicMethod dynamicMethod = new DynamicMethod(string.Empty, typeof(object), new Type[] { typeof(object) }, fieldInfo.DeclaringType, true);
ILGenerator il = dynamicMethod.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, fieldInfo);
if (fieldInfo.FieldType.IsValueType)
{
il.Emit(OpCodes.Box, fieldInfo.FieldType);
}
il.Emit(OpCodes.Ret);
FastFieldGetter invoker = (FastFieldGetter)dynamicMethod.CreateDelegate(typeof(FastFieldGetter));
getterCache[fieldInfo] = invoker;
return(invoker);
}
}
private FastFieldGetter GetFastGetter(object obj, string propertyName)
{
string key = obj.GetType().Name + "." + propertyName;
FastFieldGetter res = (FastFieldGetter)fastFieldGetterLookup[key];
if (res == null)
{
FieldInfo fieldInfo = GetFieldInfo(obj, propertyName);
res = FastFieldAccess.GetFieldGetter(fieldInfo);
fastFieldGetterLookup[key] = res;
}
return(res);
}
public virtual object GetPropertyValue(object obj, Type type, string propertyName)
{
#if NET2
FastFieldGetter getter = GetFastGetter(obj, propertyName);
return(getter(obj));
#else
FieldInfo fieldInfo = (FieldInfo)propertyLookup[obj.GetType().Name + "." + propertyName];
if (fieldInfo == null)
{
fieldInfo = GetFieldInfo(obj, propertyName);
}
return(fieldInfo.GetValue(obj));
#endif
}
