c assign function pointer to variable

Question

I have two functions,

//virDomain is some struct
int virDomainCreate(virDomain*);
int virDomainDestroy(virDomain*);

How do I assign these two functions to a variable?

I tried,

int (*func)(virDomain*) = NULL;
func = virDomainCreate(virDomain*); // not working
func = &virDomainDestroy(virDomain*); //not working

Thanks for all your help! Waka.

This post might help clarify how to use function pointers http://stackoverflow.com/questions/840501/how-do-function-pointers-in-c-work — C.B., Mar 10 '14 at 20:02
You might find http://www.cprogramming.com/tutorial/function-pointers.html useful, too. — Josh Durham, Mar 10 '14 at 20:05

Arjun Sreedharan · Accepted Answer · 2014-03-10T20:10:50.777

7

You can just assign the pointer to the function like:

func = &virDomainCreate;

Or you can just use the short format:

func = virDomainCreate;

edited Mar 10 '14 at 20:10

answered Mar 10 '14 at 20:01

Arjun Sreedharan

1

I would add that maybe func = &virDomainCreate is the safe way to do it. – waka-waka-waka Mar 10 '14 at 20:42
see http://stackoverflow.com/questions/6893285/why-do-all-these-crazy-function-pointer-definitions-all-work-what-is-really-goi – Arjun Sreedharan Mar 10 '14 at 20:50

score 1 · Answer 2 · edited Nov 18 '19 at 12:11

1

The return type is int so

int func;
func = virDomainCreate(virDomain*); 
func = virDomainDestroy(virDomain*);

will work.

edited Nov 18 '19 at 12:11

Salman Zafar

answered Mar 10 '14 at 20:09

learner

2 Answers2