POSIX C Threads. Mutex example. Don't work as expected

pthread_create(&mythread, NULL, func, NULL);pthread_create(&mythread, NULL, anotherFunc, NULL);pthread_mutex_destroy(&mymutex);

You're destroying the mutex before the threads are done with it, so all bets are off. You'll probably want to pthread_join the 2 threads before destroying it.

I got few comiplation errors

• I couldn't declare int i in for loop

• Used an argument name arg as an argument for threads "func" and "anotherFunc"

I have used pthread_join before destroying the mutex.

In this way I am destroying my mutex "mymutex" after both threads "func" and "anotherFunc" have completed their execution

Also each threads now has their own thread id "mythread1" and "mythread2" so in this way I can use pthread_join() function for each thread

#include <stdlib.h>#include <stdio.h>#include <pthread.h>pthread_t mythread1, mythread2;pthread_mutex_t mymutex;void *anotherFunc(void *arg){    pthread_mutex_lock(&mymutex);    int i;    for(i = 0; i < 100; i++)        printf("anotherFunc\n");    pthread_mutex_unlock(&mymutex);    pthread_exit(NULL);}void *func(void *arg){    pthread_mutex_lock(&mymutex);    int i;    for(i = 0; i < 100; i++)        printf("func\n");    pthread_mutex_unlock(&mymutex);    pthread_exit(NULL);}int main(int argc, char *argv[]){    pthread_mutex_init(&mymutex, NULL);    pthread_create(&mythread1, NULL, func, NULL);    pthread_create(&mythread2, NULL, anotherFunc, NULL);    pthread_join(mythread1, NULL);    pthread_join(mythread2, NULL);    pthread_mutex_destroy(&mymutex);   return EXIT_SUCCESS;}