Question

Basic function of my program: create number of counters (0), create number of instructions per threads, create the struct instructions which contain counter*, repetitions and work_fn (increment, decrement etc). Program will build all the dynamic structure (already coded up) then spawn threads and join. One thread can have more than one instructions.

static void* worker_thread(void *arg){
  long long *n;
  pthread_mutex_lock( &lock1 );

  n = (long long *) arg;
  printf("Testing: %lld.
", n);

  pthread_mutex_unlock( &lock1 );

  return NULL;
}

//nthreads is the total number of threads

for(int i=0; i < nthreads ; i++){
  pthread_create( &thread_id[i], NULL, worker_thread, &i); //Problem
}


for(int i=0; i < nthreads ; i++){
  pthread_join( thread_id[i], NULL);
}

I am trying to test the thread function, firstly create number of threads then join them. But I can t seems to pass the current thread number [i] in my case to the worker thread function.

Answer 1

int n = (int)arg;

在您的劳动者中,有阅读功能。

而且

(void*)i

页: 1

Answer 2

用途

(void *) i

in

之后

int i = (int) arg

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