Question

In other Objective-C classes I’m calling the code in a c++ class below. Sometimes the fSound object is something other than FMOD::Sound and it’s crashing when being released. How can I confirm that the fSound object is the proper type before I release it?

-(void) unloadSound:(FMOD::Sound *)fSound {

    FMOD_RESULT   result        = FMOD_OK;
    FMOD::Sound* soundEffect = static_cast<FMOD::Sound*>(fSound);

      if (soundEffect) {
          soundEffect->release();
      }

    soundEffect = NULL;
    fSound = NULL;
}    

Answer 1

You can dynamic_cast instead of static_cast (dynamic_cast returns NULL if the cast is unsuccessful).

However, you should review your design. Checking a type at runtime reveals a design problem that should be resolved with -for example- inheritance.