//C++ code that uses pthread functions
//
#include <cstdlib>
#include <iostream>
#include <pthread.h>
using namespace std;

#if defined(__cplusplus)
extern "C"
#endif

void *print_message(void* arg)
{
    int value = *(static_cast<int*>(arg));
    cout << "Threading " << value  << endl;
    
    *(static_cast<int*>(arg)) = ++value;
    cout << "The value of arg is now " << *(static_cast<int*>(arg)) << endl;
    pthread_exit(arg);
}



int main() 
{
    pthread_t t1;
    int i = 13, *ip = &i;
    if( pthread_create(&t1, NULL, print_message, (static_cast<void*>(ip))) != 0) {
	cout << "Couldn't create the thread \n";
	exit(1);
    }
    cout << "Hello" << endl;

    void* result = static_cast<void*>(ip);
    pthread_join(t1,&result);
    cout << "The return value was " << *(static_cast<int*>(result)) << endl;
    return 0;
}