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Linux/include/linux/async.h

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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 

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