/*
 *
 * (C) 2017-23 - ntop.org
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#ifndef _THREAD_POOL_H_
#define _THREAD_POOL_H_

#include "ntop_includes.h"

class QueuedThreadData {
 public:
  ThreadedActivity *j;
  char *script_path;
  NetworkInterface *iface;
  bool adaptive_pool_size;
  time_t deadline;

  QueuedThreadData(ThreadedActivity *_j, char *_path, NetworkInterface *_iface,
                   time_t _deadline) {
    j = _j, script_path = strdup(_path), iface = _iface;
    deadline = _deadline;
  }

  ~QueuedThreadData() {
    if (script_path) free(script_path);
  }
};

class ThreadPool {
 private:
  u_int16_t num_threads;
  bool terminating;
  pthread_cond_t condvar;
  Mutex *m;
#ifdef __linux__
  cpu_set_t affinity_mask;
#endif

  std::vector<pthread_t> threadsState;
  std::queue<QueuedThreadData *> threads;

  QueuedThreadData *dequeueJob(bool waitIfEmpty);

  /*
    Creates and starts a new pool thread
   */
  bool spawn();
  bool isQueueable(ThreadedActivityState cur_state);

 public:
  ThreadPool(char *comma_separated_affinity_mask = NULL);
  virtual ~ThreadPool();

  void shutdown();
  inline bool isTerminating() { return terminating; };

  void run();
  bool queueJob(ThreadedActivity *ta, char *path, NetworkInterface *iface,
                time_t scheduled_time, time_t deadline);
};

#endif /* _THREAD_POOL_H_ */
