Dining Philosopher with Threads Implementation in C/C++
Revision as of 16:58, 22 February 2014 by Arjun Suresh (talk | contribs)

<syntaxhighlight lang="c" name="diningphilosopher_thread"> //Dining philosopher using threads

  1. include<stdio.h>
  2. include<pthread.h>

void* reader(void*); pthread_mutex_t mut[5]; int n;

int main() { 

 pthread_t t1[5];
 int i,j = 0,k;
 n = 5;
 for(i = 0; i < n; i++)
   {
     j=i;
     pthread_create(&t1[i], NULL, reader, &j);
   }
 for(j = 0; j < n; j++)
   pthread_join(t1[j], NULL);
 return 1;

}

void *reader(void* arg) { 

 int val = *(int*)arg;
 printf("%d Thinking\n", val + 1);
 pthread_mutex_lock(&mut[val % n]);
 pthread_mutex_lock(&mut[(val + 1) % n]);
 printf("%d Eating\n", val + 1);
 sleep(3);
 pthread_mutex_unlock(&mut[val % n]);
 pthread_mutex_unlock(&mut[(val + 1) % n]);
 printf("%d Finished Eating\n",val + 1);

} </syntaxhighlight>



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<syntaxhighlight lang="c" name="diningphilosopher_thread"> //Dining philosopher using threads

  1. include<stdio.h>
  2. include<pthread.h>

void* reader(void*); pthread_mutex_t mut[5]; int n;

int main() { 

 pthread_t t1[5];
 int i,j = 0,k;
 n = 5;
 for(i = 0; i < n; i++)
   {
     j=i;
     pthread_create(&t1[i], NULL, reader, &j);
   }
 for(j = 0; j < n; j++)
   pthread_join(t1[j], NULL);
 return 1;

}

void *reader(void* arg) { 

 int val = *(int*)arg;
 printf("%d Thinking\n", val + 1);
 pthread_mutex_lock(&mut[val % n]);
 pthread_mutex_lock(&mut[(val + 1) % n]);
 printf("%d Eating\n", val + 1);
 sleep(3);
 pthread_mutex_unlock(&mut[val % n]);
 pthread_mutex_unlock(&mut[(val + 1) % n]);
 printf("%d Finished Eating\n",val + 1);

} </syntaxhighlight>