arrays of function calls and memory errors

[Sassy Rabbit]

I am having a run time error that I can't relate to a mistake in the algorithm and seem to be reminiscent of a memory error.

The object has an array of function calls which are initialized during runtime. The functions are then called with the following syntax: (this->*kCalls[tj][ti])( function input ). Now some of my functions are set to null at runtime because they refer to cases not present in the current state of my program - would this cause a problem?

Thanks!

 

[SunnyD]

Null functions pointers shouldn't matter as long as you don't try to call them. Take the dereference off the array... the array operators are already dereferencing for you - that might help.

 

[Templeton]

Originally posted by: SunnyD
Null functions pointers shouldn't matter as long as you don't try to call them. Take the dereference off the array... the array operators are already dereferencing for you - that might help.

He's not dereferencing the array, ->* is the pointer to member operator.

That said, you should only be calling through to valid function pointers, anything else is undefined and will probably lead to strange runtime behavior.

 

[CTho9305]

If you suspect memory issues, I strongly recommend running your program under Valgrind (I don't think Valgrind runs under Windows, but it's really really useful).