/*

 *

 * (C) 2013-25 - 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 _MUTEX_H_

#define _MUTEX_H_

#include "ntop_includes.h"

/* #define MUTEX_DEBUG 1 */

/* ******************************* */

class Mutex {

 private:

  pthread_mutex_t the_mutex;

  bool locked;

#ifdef MUTEX_DEBUG

  char last_lock_file[64], last_unlock_file[64];

  int last_lock_line, last_unlock_line;

  u_int num_locks, num_unlocks;

#endif

  void initialize();

 public:

  Mutex();

  ~Mutex() { pthread_mutex_destroy(&the_mutex); };

  bool lock(const char *filename, const int line, bool trace_errors = true);

  bool lockTimeout(const char *filename, const int line, struct timespec *wait,

                   bool trace_errors = true);

  void unlock(const char *filename, const int line, bool trace_errors = true);

  inline bool is_locked() { return (locked); };

  /* NOTE: this must be called while locked */

  inline int cond_wait(pthread_cond_t *condvar) {

    return pthread_cond_wait(condvar, &the_mutex);

  };

};

#endif /* _MUTEX_H_ */