echotext.cpp

/* echotext.cpp */

/* ... */

/* create a mutex lock */
static pthread_mutex_t echoLock;

void *echoThis(void *text)
{
    /* acquire the mutex lock */
    if(pthread_mutex_lock(&echoLock))
    {
        /* error acquiring lock */
        perror("pthread_mutex_lock");
    }

/* ... critical section code here ... */
}

int main(int argc, char * argv[])
{
/* ... */

/* initialize the mutex lock */
    if(pthread_mutex_init(&echoLock, NULL))
    {
        /* error initializing lock */
        perror("pthread_mutex_init");
    }

    /* ... */

    /* remove the mutex */
    if(pthread_mutex_destroy(&echoLock))
    {
        /* error removing the mutex */
        perror("pthread_mutex_destroy");
    }

/* ... */
}
/* end of echotext.cpp */