//Introductory "Hello World"
//Concurrent Modeling Program
#include "systemc.h"

//Definition of 1st Concurrent Module
SC_MODULE (My1stModule)
{

	//In the constructor block, spawn a new
	//thread called "hello_prc". 
	SC_CTOR (My1stModule) 
	{
		SC_THREAD (hello_prc);
	}

	//This thread will run as long as their 
	//is SystemC simulation. 
	void hello_prc()
	{
		//This while loop allows the thread
		//to run for "virtually forever"
		while(1)
		{
			//Print "Hello World" to the console.
			cout << "Hello World.\n";

			//Suspend this thread for 20 nanoseconds.
			//This allows the simulator to give control
			//to any other threads running concurrently
			wait(20,SC_NS);			
		}
	}

};

//Definition of 1st Concurrent Module
SC_MODULE (My2ndModule)
{

	SC_CTOR (My2ndModule) 
	{
		SC_THREAD (hi_prc);
	}

	void hi_prc()
	{
		while(1)
		{
			cout << "Hi There.\n";
			wait(10,SC_NS);
		}
	}

};

int sc_main(int argc, char* argv[])
{
	//Instantiate both modules
	My1stModule hello("1stConcurrentModule");

	My2ndModule hi("2ndConcurrentModule");

	//Run Simulation for 50 nanoseconds
	sc_start(50,SC_NS);

	return(0);
}