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20160407182200-add-quantity-field.up.sql

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  • async.h 1.65 KiB
    /*
     * 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