#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>

int PROCEED = 0;
int THREADPRINT = 1;  //if 0 main prints, if 1 thread prints.

void *thread_method (void *arg);

int main (int argc, char **argv) {

 pthread_t th;
 void *result;  //arguments to and from threads are always void * pointers
 pthread_create (&th,NULL,thread_method,"I'm running");
  //pointer to thread variable,properties of thread (usually NULL),name of method (function pointer),argument to method
  //pthread_create starts a thread running on the specified method, but main keeps going (normally the main method blocks when it calls another method)
/* for (int i=0; i < 10000; i++) {
  printf ("Main Method\n");
 }
*/
 while (THREADPRINT);
 printf ("Press Enter when you want the other thread to proceed:  ");
 char c[50];
 fgets(c,50,stdin);
 PROCEED = 1;
 pthread_join (th,&result);  //wait for the thread to terminate, and grab what it returns
 printf ("Thread returns:  %s\n",(char *)result);
 return 0;
}


void *thread_method (void *arg) {

 while (!THREADPRINT);
 printf ("Waiting until I get the signal to proceed\n");
 THREADPRINT = 0;
 while (!PROCEED);
 char *s = (char *)arg;
 for (int i=0; i< 10000; i++) {
  printf ("%s\n",s);
 }
/*
 int x=5;
 if (x=0) printf ("Made it here!\n");
*/
 return "I'm Done!";
}