Write a segment of code which will do the following Declare

Write a segment of code which will do the following Declare a structure which contains two integer values, start and end Declare a thread which will take in a pointer to the structure declared previously and will sum the numbers between start and end and then will add the result to the value sum Write a main function which will invoke two threads, passing in the values of 1 and 10 and 11 and 20 as start and end values The main will wait for both threads to terminate and then will print the sum out to the console d Be sure to properly synchronize all critical segments

Solution

#include <pthread.h>

#include <stdio.h>

/* Global Variable, sum, to add results of all threads */

int sum = 0;

/* Structure declaration containing two data members, start and end */

struct start_end

{

int start;

int end;

};

/* Function to add start and end values and add result to sum */

void* sum_print (void* parameters)

{

   struct start_end* p = (struct start_end*) parameters;

    int i, result;

    result = 0;

  

/* Add the values between start and end values inclusive of both */

for (i = (p->start); (i <= p->end); i++)

      result = result + i;

/* Add the result to the global variable, sum */

sum = sum + result;   

return NULL;

}

/* The main() function */

int main ()

{

pthread_t tid1;

pthread_t tid2;

struct start_end thread1_args;

struct start_end thread2_args;

/* Create thread 1 to pass start and end values as 1 and 10, respectively. */

thread1_args.start = 1;

thread1_args.end = 10;

pthread_create (&tid1, NULL, &sum_print, &thread1_args);

/* Create thread 2 to pass start and end values as 11 and 20, respectively. */

thread2_args.start = 11;

thread2_args.end = 20;

pthread_create (&tid2, NULL, &sum_print, &thread2_args);

/* Ensure both the threads has finished execution. */

pthread_join (tid1, NULL);

pthread_join (tid2, NULL);

/* Now print the final result. */

printf(“The total sum of thread 1 and thread 2 is: %d\ “, sum);

return 0;

}