/*
   * async.h: Asynchronous function calls for boot performance
   *
   * (C) Copyright 2009 Intel Corporation
   * Author: Arjan van de Ven <arjan@linux.intel.com>
   *
   * 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; version 2
   * of the License.
   */
  #ifndef __ASYNC_H__
  #define __ASYNC_H__
  
  #include <linux/types.h>
  #include <linux/list.h>
  
  typedef u64 async_cookie_t;
  typedef void (*async_func_t) (void *data, async_cookie_t cookie);
  struct async_domain {
  	struct list_head pending;
  	unsigned registered:1;
  };
  
  /*
   * domain participates in global async_synchronize_full
   */
  #define ASYNC_DOMAIN(_name) \
  	struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending),	\
  				      .registered = 1 }
  
  /*
   * domain is free to go out of scope as soon as all pending work is
   * complete, this domain does not participate in async_synchronize_full
   */
  #define ASYNC_DOMAIN_EXCLUSIVE(_name) \
  	struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \
  				      .registered = 0 }
  
  extern async_cookie_t async_schedule(async_func_t func, void *data);
  extern async_cookie_t async_schedule_domain(async_func_t func, void *data,
  					    struct async_domain *domain);
  void async_unregister_domain(struct async_domain *domain);
  extern void async_synchronize_full(void);
  extern void async_synchronize_full_domain(struct async_domain *domain);
  extern void async_synchronize_cookie(async_cookie_t cookie);
  extern void async_synchronize_cookie_domain(async_cookie_t cookie,
  					    struct async_domain *domain);
  extern bool current_is_async(void);
  #endif