how to know whether the model running is in simulation model, code gen mode or in rapid accel mode in script?

In model initialization , If I want to know whether the model running is in simulation model code gen mode or rapid accel mode , how can we get that ?

Is there any function that we can use ?

I know a function "rtwenvironmentmode",but is gives information about simulation correctly

Is there any other function that gives the information ? or are there any object parameters of model that I can read in order to get the information ?

[Kaustubha Govind]

Could you please specify where you intend to run the query from - is this from an S-function?

[Ajay Pherwani]

I intent to write a m-script for that and call that in simulink model callbacks