/*
 *  Copyright (C) 2004 Aleksandar Colovic
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */
 
#include <pthread.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <iostream>
using namespace std;

int main (int argc, char* const argv[])
{
  int fd = open("/tmp/pmutex", O_RDWR);
  void* pMem = mmap (NULL, 4*1024, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
  pthread_mutex_t* pMutex = (pthread_mutex_t*)pMem;
  
  cout << "Process 2 waiting for the mutex ..." << endl;
  pthread_mutex_lock (pMutex);
  cout << "Process 2 got the mutex ..." << endl;
  pthread_mutex_unlock(pMutex);
  cout << "Process 2 released mutex. Exiting ..." << endl;
  close(fd);
  return 0;
}