Implement Reader-Writer problem using OPENMP

PROGRAM:

#include<stdio.h>

#include<omp.h>

#include<string.h>

int main()

{

char buf1[100];

strcpy(buf1,"hi");

int i;

omp_set_num_threads(2);

omp_lock_t writelock;

omp_init_lock(&writelock);

    

#pragma omp parallel

{

     int tid=omp_get_thread_num();

if(tid==0)

{ 

     printf("I am THREAD:%d writing",omp_get_thread_num());

 

     omp_set_lock(&writelock);

strcat(buf1,"writing to the buffer");

   omp_unset_lock(&writelock);

}

 //strcat(buf1,"contents are getting written");

   if(tid==1)

{

omp_set_lock(&writelock);

 printf("\nI am THREAD:%d reading",omp_get_thread_num());

     printf("\nthe buffer contents are:\n %s",buf1);

omp_unset_lock(&writelock);

 }    

}

return 0;

}

OUTPUT :

[pict@localhost ~]$ gcc b9_1.c -fopenmp 

[pict@localhost ~]$ ./a.out

I am THREAD:0 writing

I am THREAD:1 reading

the buffer contents are:

 hi[pict@localhost ~]$