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  1. /*
  2.  * async.h: Asynchronous function calls for boot performance
  3.  *
  4.  * (C) Copyright 2009 Intel Corporation
  5.  * Author: Arjan van de Ven <arjan@linux.intel.com>
  6.  *
  7.  * This program is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU General Public License
  9.  * as published by the Free Software Foundation; version 2
  10.  * of the License.
  11.  */
  12. #ifndef __ASYNC_H__
  13. #define __ASYNC_H__
  14.  
  15. #include <linux/types.h>
  16. #include <linux/list.h>
  17.  
  18. typedef u64 async_cookie_t;
  19. typedef void (*async_func_t) (void *data, async_cookie_t cookie);
  20. struct async_domain {
  21.         struct list_head pending;
  22.         unsigned registered:1;
  23. };
  24.  
  25. /*
  26.  * domain participates in global async_synchronize_full
  27.  */
  28. #define ASYNC_DOMAIN(_name) \
  29.         struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \
  30.                                       .registered = 1 }
  31.  
  32. /*
  33.  * domain is free to go out of scope as soon as all pending work is
  34.  * complete, this domain does not participate in async_synchronize_full
  35.  */
  36. #define ASYNC_DOMAIN_EXCLUSIVE(_name) \
  37.         struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \
  38.                                       .registered = 0 }
  39.  
  40. extern async_cookie_t async_schedule(async_func_t func, void *data);
  41. extern async_cookie_t async_schedule_domain(async_func_t func, void *data,
  42.                                             struct async_domain *domain);
  43. void async_unregister_domain(struct async_domain *domain);
  44. extern void async_synchronize_full(void);
  45. extern void async_synchronize_full_domain(struct async_domain *domain);
  46. extern void async_synchronize_cookie(async_cookie_t cookie);
  47. extern void async_synchronize_cookie_domain(async_cookie_t cookie,
  48.                                             struct async_domain *domain);
  49. extern bool current_is_async(void);
  50. #endif
  51.