C++ : how to get address of current function

Question

here is my problem:

I have a function pointer vector and an iterator for it:

std::vector<void* (*) (void*)> f_callbackVector;
std::vector<void* (*) (void*)>::iterator f_callbackVectorIterator = f_callbackVector.begin();

I populate the vector with some functions:

f_callbackVector.push_back((void* (*) (void*))handleDeliveryModeChange);

When I am in the function, I want to be able to check that the iterator holds a pointer to this current function. I tried this:

void handleDeliveryModeChange(SESSION s, const DELIVERY_MODE d1, const DELIVERY_MODE d2) {
    if (static_cast<void (*) (void*, DELIVERY_MODE, DELIVERY_MODE)>((*f_callbackVectorIterator)) == &handleDeliveryModeChange) {
    LOG_MESSAGE("\n\n\n\nWOW\n\n\n\n");
}
}

and got:

invalid static_cast from type âvoid* (*)(void*)â to type âvoid (*)(void*, DELIVERY_MODE, DELIVERY_MODE)â

I would appreciate some help with this.

Thanks!

UPD: I tried:

if (*(f_callbackVectorIterator) == &handleDeliveryModeChange) 

and got error: comparison between distinct pointer types âvoid ()(void)â and âvoid ()(void, DELIVERY_MODE, DELIVERY_MODE)â lacks a cast

I even tried this monster:

if ((*f_callbackVectorIterator) == static_cast<&(void* (*) (void*))>(&handleDeliveryModeChange))

Still no luck, got lots of obscure syntaxis errors.

Answer 1

You are lying to the compiler:

f_callbackVector.push_back((void* (*) (void*))handleDeliveryModeChange);

handleDeliveryModeChange does not match this signature. Its signature is actually:

void (*)(SESSION, DELIVERY_MODE, DELIVERY_MODE)

You could make it work by changing to this: Code

#include <vector>
#include <iostream>

typedef void* SESSION;       // Or whatever it is
typedef void* DELIVERY_MODE; // You didn't say what these are
typedef void* (*Func) (SESSION, DELIVERY_MODE, DELIVERY_MODE);
typedef std::vector<Func> FuncVector;

FuncVector f_callbackVector;
FuncVector::iterator f_callbackVectorIterator = f_callbackVector.begin();

// Note: Your pointers return void*, so I changed the return type from void:
void* handleDeliveryModeChange
(
  SESSION s,
  const DELIVERY_MODE d1,
  const DELIVERY_MODE d2
)
{
  if ((*f_callbackVectorIterator) == &handleDeliveryModeChange)
  {
    std::cout << "\n\n\n\nWOW\n\n\n\n";
  }
  return NULL;
}

int main()
{

  f_callbackVector.push_back(handleDeliveryModeChange);
}

Answer 2

&myfunc gets the address of the function.