where should i use individual random arrival time in sleep function. should i use sleep function as | Together C & C++ | Page 1

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where should i use individual random arrival time in sleep function. should i use sleep function as soon as i create thread or should i use sleep in customer activity function or should i use it elsewhere


#include <pthread.h>    //Create POSIX threads.
#include <semaphore.h>  //To create semaphores
#include <stdio.h>      //Input Output
#include <stdlib.h>
#include <time.h>    //Wait for a random time.
#include <unistd.h>  //Thread calls sleep for specified number of seconds.

#define CUSTOMER_NUMBER 25
#define CUSTOMER_ARRIVAL_TIME_MIN 1
#define CUSTOMER_ARRIVAL_TİME_MAX 3
#define REGISTER_NUMBER 5

int arrival_time = 0;

int customer_num[CUSTOMER_NUMBER];  // The array that holding customers id

void* Customer_Activity(void* customer_id);

int main(int argc, char* argv[]) {
  int id;
  int i;

  pthread_t customers[CUSTOMER_NUMBER];

  sem_init(&registers_sem, 0, REGISTER_NUMBER);

  for (i = 0; i < CUSTOMER_NUMBER; i++) {
    customer_num[i] = i;
  }

  // Create the customer threads

  for (id = 0; id < CUSTOMER_NUMBER; id++) {
    srand(time(NULL));
    arrival_time =
        CUSTOMER_ARRIVAL_TIME_MIN + rand() % CUSTOMER_ARRIVAL_TİME_MAX;
    sleep(arrival_time);
    pthread_create(&customers[id], NULL, Customer_Activity,
                   (void*)&customer_num[id]);
  }

  for (i = 0; i < CUSTOMER_NUMBER; i++) {
    pthread_join(customers[i], NULL);
  }
  return 0;
}

void* Customer_Activity(void* customer_id) {
  int c_id = *(int*)customer_id;
  printf("\nCUSTOMER %d IS CREATED %d AFTER SECONDS.", c_id, arrival_time);
}

yildiz

#where should i use individual random arrival time in sleep function. should i use sleep function as