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/dnv.h

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    1 /*-
    2  * Copyright (c) 2013 The FreeBSD Foundation
    3  * All rights reserved.
    4  *
    5  * This software was developed by Pawel Jakub Dawidek under sponsorship from
    6  * the FreeBSD Foundation.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: releng/11.1/sys/sys/dnv.h 285130 2015-07-04 10:33:33Z oshogbo $
   30  */
   31 
   32 #ifndef _DNV_H_
   33 #define _DNV_H_
   34 
   35 #include <sys/cdefs.h>
   36 
   37 #ifndef _KERNEL
   38 #include <stdarg.h>
   39 #include <stdbool.h>
   40 #include <stddef.h>
   41 #include <stdint.h>
   42 #endif
   43 
   44 #ifndef _NVLIST_T_DECLARED
   45 #define _NVLIST_T_DECLARED
   46 struct nvlist;
   47 
   48 typedef struct nvlist nvlist_t;
   49 #endif
   50 
   51 __BEGIN_DECLS
   52 
   53 /*
   54  * The dnvlist_get functions returns value associated with the given name.
   55  * If it returns a pointer, the pointer represents internal buffer and should
   56  * not be freed by the caller.
   57  * If no element of the given name and type exists, the function will return
   58  * provided default value.
   59  */
   60 
   61 bool dnvlist_get_bool(const nvlist_t *nvl, const char *name, bool defval);
   62 uint64_t dnvlist_get_number(const nvlist_t *nvl, const char *name, uint64_t defval);
   63 const char *dnvlist_get_string(const nvlist_t *nvl, const char *name, const char *defval);
   64 const nvlist_t *dnvlist_get_nvlist(const nvlist_t *nvl, const char *name, const nvlist_t *defval);
   65 int dnvlist_get_descriptor(const nvlist_t *nvl, const char *name, int defval);
   66 const void *dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep, const void *defval, size_t defsize);
   67 
   68 /*
   69  * The dnvlist_take functions returns value associated with the given name and
   70  * remove corresponding nvpair.
   71  * If it returns a pointer, the caller has to free it.
   72  * If no element of the given name and type exists, the function will return
   73  * provided default value.
   74  */
   75 
   76 bool dnvlist_take_bool(nvlist_t *nvl, const char *name, bool defval);
   77 uint64_t dnvlist_take_number(nvlist_t *nvl, const char *name, uint64_t defval);
   78 char *dnvlist_take_string(nvlist_t *nvl, const char *name, char *defval);
   79 nvlist_t *dnvlist_take_nvlist(nvlist_t *nvl, const char *name, nvlist_t *defval);
   80 int dnvlist_take_descriptor(nvlist_t *nvl, const char *name, int defval);
   81 void *dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep, void *defval, size_t defsize);
   82 
   83 __END_DECLS
   84 
   85 #endif  /* !_DNV_H_ */

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