text: /**
   * @file re_lock.h  Interface to locking functions
   *
   * Copyright (C) 2010 Creytiv.com
   */
  
  
  struct lock;
  
  int  lock_alloc(struct lock **lp);
  
  void lock_read_get(struct lock *l);
  void lock_write_get(struct lock *l);
  
  int  lock_read_try(struct lock *l);
  int  lock_write_try(struct lock *l);
  
  void lock_rel(struct lock *l);
  