a C++ program that creates “nthreads” (number of child thre

a C++ program that creates “nthreads” (number of child threads from… a C++ program that creates “nthreads” (number of child threads from the input). Each child thread must print a message into STDOUT based on the following rules: You will assign a thread number to each child thread based on their created order. The value for the thread number must start from zero and be increased by one before assigning it to the next child thread. You must guarantee that the first child thread has a thread number equal to zero, the second child thread has a thread number equal to one, and the nth child thread has a thread number equal to n -1.Each child thread will print a predefined message (available in the template file). The print statement executed by the child thread cannot be inside of a critical section.Your program must guarantee that messages are printed in the order specified by the “turn” array. For nthreads = 5, and a turn = {3,1,0,4,2} the expected output is:I am Thread 3 I am Thread 1 I am Thread 0 I am Thread 4 I am Thread 2 NOTES You must create n child threads (where n is the value that your program receives from STDIN).You can only use POSIX semaphores, pthreads mutex semaphores, or pthreads condition variables to achieve synchronization (A penalty of 100% will be applied to solutions using mechanisms other than the synchronization mechanisms listed before).A penalty of 100% will be applied to solutions that do not assign the “threadNumber” based on the specifications of the question.Programs not compiling will receive a penalty of 100%.To simplify your solution, the template file defines several global variables that you are allowed to use in your program for this programming question. However, remember that you should avoid using global variables when writing programs.#include #include #include #include #include static pthread_mutex_t bsem;    // Mutex semaphorestatic pthread_cond_t waitTurn = PTHREAD_COND_INITIALIZER;  // Condition variable to control the turnstatic int *turn;   // Array to store the order that child threads static int turnIndex; // Index to control access to the turn arraystatic int nthreads; // Number of threads from inputvoid *print_based_on_input_order(void *void_ptr_argv){// std::cout << "I am Thread " << /*variable identifier*/ << std::endl;   return nullptr;}int main(){   std::cin >> nthreads;   pthread_mutex_init(&bsem, NULL); // Initialize bsem to 1 pthread_t *tid= new pthread_t[nthreads];int *threadNumber=new int[nthreads];   turn = new int[nthreads];   for (int i=0;i> turn[i];   turnIndex = // initialize the index for the turn array herefor(int i=0;i

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