SystemC - How can I get the module name to which sc_signal connected? - systemc

Question

I'd like to print out the name of sc_module to which sc_signal connected.
How can I get the module name, "module_a" in the following code, from "sig_out"?
#include "systemc.h"
class sig_if : virtual public sc_interface
{
};
class my_sig : public sc_module, public sig_if
{
public:
my_sig(sc_module_name nm) : sc_module(nm)
{
}
};
SC_MODULE(test_module)
{
sc_port<sig_if> out;
SC_CTOR(test_module)
{
}
};
int sc_main(int argc, char* argv[]) {
test_module module_a("module_a");
my_sig sig_out("sig_out");
module_a.out(sig_out);
// std::cout << sig_out.get_parent() << std::endl;
sc_start();
return 0;
}

Answer 1

You could override sc_interface::register_port() in the my_sig class to save a reference to the bound port. The parent of the bound port is the module that contains the port.
#include <iostream>
#include <cassert>
#include "systemc.h"
class sig_if : virtual public sc_interface
{
};
class my_sig : public sc_module, public sig_if
{
public:
my_sig(sc_module_name nm) : sc_module(nm), bound_port(NULL)
{
}
void register_port(sc_port_base& port, const char*) {
bound_port = &port;
}
sc_object* get_bound_module() const {
assert(bound_port);
return bound_port->get_parent_object();
};
sc_port_base* bound_port;
};
SC_MODULE(test_module)
{
sc_port<sig_if> out;
SC_CTOR(test_module)
{
}
};
int sc_main(int argc, char* argv[]) {
test_module module_a("module_a");
my_sig sig_out("sig_out");
module_a.out(sig_out);
sc_start(0, SC_NS);
std::cout << sig_out.get_bound_module()->name() << std::endl;
return 0;
}
The above code prints the name of module_a. Note that sig::get_bound_module() can only be called after elaboration, that is, after sc_start() has been called, because sc_interface::register_port() is only called during elaboration.