CODEWITHSUNDEEP
cfunctionpointers
user1508893
user1508893

Reputation: 9783

What's the meaning of this declaration?

I saw this one in one of the .h files provided by my professor for a project, but I'm not too sure what this means. 

int (*get_console_dev)(void);

Is it the same as

(int*) get_console_dev(void);

(a function named get_console_dev, which returns a pointer to an int?)

Thanks

Upvotes: 1

Views: 79

Answers (4)

pb2q
pb2q

Reputation: 59607

int (*get_console_dev)(void) is a function pointer declaration. get_console_dev is a variable that can hold a reference to a function matching the specific signature. 

int consoleFunction(void);

// ...

int (*get_console_dev)(void);

get_console_dev = consoleFunction;

This declaration is not the same as: (int*) get_console_dev(void);.

Check this with cdecl.

Upvotes: 3

Sandeep Adimadhyam
Sandeep Adimadhyam

Reputation: 1

Please read up function pointers. it is a pointer to a function that takes void (as argument) and returns integer

Upvotes: 0

Pushpendra
Pushpendra

Reputation: 810

int (*get_console_dev)(void);

This is Pointer pointer function with no parameter and return type as integer.

(int*) get_console_dev(void);

This is function with no parameter and return type as pointer of type integer.

Both are completely different.

Upvotes: 0

cnicutar
cnicutar

Reputation: 182619

It's a function pointer that can point to a function returning int and taking 0 parameters; it's not equivalent to the second line you posted.

Upvotes: 7

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