private static GetControlsDelegate GetGetControlsDelegate()
{
GetControlsDelegate handler = null;
FieldInfo controls = GetField("_controls");
SecurityCritical.ExecutePrivileged(new PermissionSet(PermissionState.Unrestricted), delegate
{
System.Reflection.Emit.DynamicMethod dm = new System.Reflection.Emit.DynamicMethod("get_Controls", typeof(ControlCollection), new Type[] { typeof(Control) }, typeof(Control).Module, true);
ILGenerator il = dm.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, controls);
il.Emit(OpCodes.Ret);
handler = (GetControlsDelegate)dm.CreateDelegate(typeof(GetControlsDelegate));
});
return(handler);
}
private static GetControlsDelegate GetGetControlsDelegate()
{
GetControlsDelegate handler = null;
if (SystemUtils.Clr4Runtime)
{
FieldInfo controls = GetField("_controls");
SecurityCritical.ExecutePrivileged(new PermissionSet(PermissionState.Unrestricted), delegate
{
System.Reflection.Emit.DynamicMethod dm = new System.Reflection.Emit.DynamicMethod("get_Controls", typeof(ControlCollection), new Type[] { typeof(Control) }, typeof(Control).Module, true);
ILGenerator il = dm.GetILGenerator();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, controls);
il.Emit(OpCodes.Ret);
handler = (GetControlsDelegate)dm.CreateDelegate(typeof(GetControlsDelegate));
});
}
else
{
FieldInfo occasionalFields = GetField("_occasionalFields");
MethodInfo ensureOccasionalFields = GetMethod("EnsureOccasionalFields");
FieldInfo controls = occasionalFields.FieldType.GetField("Controls");
SecurityCritical.ExecutePrivileged(new PermissionSet(PermissionState.Unrestricted), delegate
{
System.Reflection.Emit.DynamicMethod dm = new System.Reflection.Emit.DynamicMethod("get_Controls", typeof(ControlCollection), new Type[] { typeof(Control) }, typeof(Control).Module, true);
ILGenerator il = dm.GetILGenerator();
Label occFieldsNull = il.DefineLabel();
Label retControls = il.DefineLabel();
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, occasionalFields);
il.Emit(OpCodes.Brfalse_S, occFieldsNull);
il.MarkLabel(retControls);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, occasionalFields);
il.Emit(OpCodes.Ldfld, controls);
il.Emit(OpCodes.Ret);
il.MarkLabel(occFieldsNull);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, ensureOccasionalFields);
il.Emit(OpCodes.Br, retControls);
handler = (GetControlsDelegate)dm.CreateDelegate(typeof(GetControlsDelegate));
});
}
return handler;
}
