Problem setting signal handler

[pradeep]

Hello again friends:

I'm now trying to get a signal handler to work. I have made the example
code below to check I can make it work, but there is a compiler error,

argument of type ‘void (MyApp:(int)’ does not match ‘void (*)(int)’

Can anyone help?

Thanks.



#include <iostream>
#include <signal.h>

class MyApp {
public:
MyApp(void) { signal(SIGINT, Handler); }
~MyApp(void) { signal(SIGINT, SIG_DFL); }
void Handler(int) { std::cerr << "test\n"; }
};

void main()
{
MyApp x;
sleep(10);
return 0;
}

 

[Martin Ambuhl]

Hello again friends:

I'm now trying to get a signal handler to work. I have made the example
code below to check I can make it work, but there is a compiler error,

argument of type ‘void (MyApp:(int)’ does not match ‘void (*)(int)’

^^^^^^^^

How many times do you need to be told that the language of
<is C. Why do you keep posting some other language
here?

 

[Antoninus Twink]

I'm now trying to get a signal handler to work. I have made the example
code below to check I can make it work, but there is a compiler error, [snip]
class MyApp {
public:
MyApp(void) { signal(SIGINT, Handler); }
~MyApp(void) { signal(SIGINT, SIG_DFL); }
void Handler(int) { std::cerr << "test\n"; }
};

The problem is that non-static member functions take an extra hidden
parameter (namely the "this" pointer to the current instance of the
class), so you can't use a pointer to a non-static member function as a
general pointer to a function.

The easiest solution for you will be to make the Handler function
static.

 

[santosh]

Hello again friends:

I'm now trying to get a signal handler to work. I have made the
example code below to check I can make it work, but there is a
compiler error,

argument of type ?void (MyApp:(int)? does not match ?void (*)(int)?

Can anyone help?
Thanks.

#include <iostream>
#include <signal.h>

<snip>

Please post to <It should be carried on virtually
all Usenet servers including the one you seem to be using. A program
using C that is a proper subset of C++ is topical in c.l.c++, but C++
is not topical here.