I've been searching for answers to this problem for the past hour but can't find a solution that works. I'm trying to use function pointers to call a non-static member function of a specific object. My code compiles fine, but during runtime I get a nasty runtime exception that says:
Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention.
A lot of websites said to specify the calling convention in the method header, so I added __cdecl before it. However, my code encountered the same runtime exception after the change (I tried using other calling conventions as well). I'm not sure why I have to specify cdecl in the first place because my project settings are set to cdecl. I am using some external libraries, but those were working fine before I added this function pointer stuff.
I'm following this: https://stackoverflow.com/a/151449
My code:
A.h
#pragma once
class B;
typedef void (B::*ReceiverFunction)();
class A
{
public:
A();
~A();
void addEventListener(ReceiverFunction receiverFunction);
};
A.cpp
#include "A.h"
A::A(){}
A::~A(){}
void A::addEventListener(ReceiverFunction receiverFunction)
{
//Do nothing
}
B.h
#pragma once
#include <iostream>
#include "A.h"
class B
{
public:
B();
~B();
void testFunction();
void setA(A* a);
void addEvent();
private:
A* a;
};
B.cpp
#include "B.h"
B::B(){}
B::~B(){}
void B::setA(A* a)
{
this->a = a;
}
void B::addEvent()
{
a->addEventListener(&B::testFunction); //This is the offending line for the runtime exception
}
void B::testFunction()
{
//Nothing here
}
main.cpp
#include "A.h"
#include "B.h"
int main()
{
A* a = new A();
B* b = new B();
b->setA(a);
b->addEvent();
}
I'm running with Visual Studio 2010, but I'd like my code to work on other platforms with minimal changes.
