The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/percpu.h

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    1 /*      $NetBSD: percpu.h,v 1.5 2020/02/07 11:55:22 thorpej Exp $       */
    2 
    3 /*-
    4  * Copyright (c)2007,2008 YAMAMOTO Takashi,
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #ifndef _SYS_PERCPU_H_
   30 #define _SYS_PERCPU_H_
   31 
   32 #include <sys/percpu_types.h>
   33 
   34 void    percpu_init(void);
   35 void    percpu_init_cpu(struct cpu_info *);
   36 percpu_t *percpu_alloc(size_t);
   37 void    percpu_free(percpu_t *, size_t);
   38 void    *percpu_getref(percpu_t *);
   39 void    percpu_putref(percpu_t *);
   40 
   41 typedef void (*percpu_callback_t)(void *, void *, struct cpu_info *);
   42 void    percpu_foreach(percpu_t *, percpu_callback_t, void *);
   43 void    percpu_foreach_xcall(percpu_t *, u_int, percpu_callback_t, void *);
   44 
   45 percpu_t *percpu_create(size_t, percpu_callback_t, percpu_callback_t, void *);
   46 
   47 /* low-level api; don't use unless necessary */
   48 void    percpu_traverse_enter(void);
   49 void    percpu_traverse_exit(void);
   50 void    *percpu_getptr_remote(percpu_t *, struct cpu_info *);
   51 
   52 #endif /* _SYS_PERCPU_H_ */

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