Using c++ function pointer as signal handler. -

i'd add new handler signal sigusr1 in code. here's signal signature form header file signal.h :

void (*signal(int, void (*)(int)))(int);

my handler member function, i'm using std::bind make function fit in signal accepted input.

myclass::my_handler(int x);

here's conversion of member function signal accepted input:

std::bind(&myclass::my_handler, this, std::placeholders::_1);

however, std::bind return c++ representation of function pointer (a.k.a std::function<void(int)>) , need c representation (void)(*)(int).

should casting forcefully, or perhaps there's c++ alternative signal ?

thanks

there no portable way convert c++ function c function because can have different abis.

what can declare global variable cpphandler -

std::function<void(int)> cpphandler = null;

also declare function -

extern "c" {     void signal_handler(int i); } void signal_handler(int i){     cpphandler(i);     return; }

now in function want create binding -

cpphandler = std::bind(&myclass::my_handler, this, std::placeholders::_1);  signal(x, signal_handler); //replace x whatever signal want install

this makes sure function signal_handler created c abi. , calls c++ function code c++ abi.

now can use signal function signal_handler.

RT