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Modify the following code by adding (test and set synchronisation)on it.    #include #include #include long long sum=0,num=2000000; pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; void *mySumFun(void *vargp) { int step=*(int *) vargp; for(int i=0;i

Modify the following code by adding (test and set synchronisation)on it.    #include #include #include long long sum=0,num=2000000; pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; void *mySumFun(void *vargp) { int step=*(int *) vargp; for(int i=0;i

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Modify the following code by adding (test and set synchronisation)on it. 

 

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

long long sum=0,num=2000000;

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

void *mySumFun(void *vargp)
{
int step=*(int *) vargp;

for(int i=0;i<num;i++)
{
//pthread_mutex_lock(&mutex);

sum+=step;
// pthread_mutex_unlock(&mutex);
}
return NULL;
}
int main()
{
pthread_t tid1,tid2;
int step1=1, step2=-1;
pthread_create(&tid1, NULL, mySumFun, &step1);

pthread_create(&tid2, NULL, mySumFun, &step2);
pthread_join(tid2, NULL);
pthread_join(tid1, NULL);
printf("The sum is = %lld \n", sum);
exit(0);
}

 

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