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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2013 The FreeBSD Foundation
    5  * All rights reserved.
    6  *
    7  * This software was developed by Pawel Jakub Dawidek under sponsorship from
    8  * the FreeBSD Foundation.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD$
   32  */
   33 
   34 #ifndef _DNV_H_
   35 #define _DNV_H_
   36 
   37 #include <sys/cdefs.h>
   38 
   39 #ifndef _KERNEL
   40 #include <stdarg.h>
   41 #include <stdbool.h>
   42 #include <stddef.h>
   43 #include <stdint.h>
   44 #endif
   45 
   46 #ifndef _NVLIST_T_DECLARED
   47 #define _NVLIST_T_DECLARED
   48 struct nvlist;
   49 
   50 typedef struct nvlist nvlist_t;
   51 #endif
   52 
   53 __BEGIN_DECLS
   54 
   55 /*
   56  * The dnvlist_get functions returns value associated with the given name.
   57  * If it returns a pointer, the pointer represents internal buffer and should
   58  * not be freed by the caller.
   59  * If no element of the given name and type exists, the function will return
   60  * provided default value.
   61  */
   62 
   63 bool dnvlist_get_bool(const nvlist_t *nvl, const char *name, bool defval);
   64 uint64_t dnvlist_get_number(const nvlist_t *nvl, const char *name, uint64_t defval);
   65 const char *dnvlist_get_string(const nvlist_t *nvl, const char *name, const char *defval);
   66 const nvlist_t *dnvlist_get_nvlist(const nvlist_t *nvl, const char *name, const nvlist_t *defval);
   67 int dnvlist_get_descriptor(const nvlist_t *nvl, const char *name, int defval);
   68 const void *dnvlist_get_binary(const nvlist_t *nvl, const char *name, size_t *sizep, const void *defval, size_t defsize);
   69 
   70 /*
   71  * The dnvlist_take functions returns value associated with the given name and
   72  * remove corresponding nvpair.
   73  * If it returns a pointer, the caller has to free it.
   74  * If no element of the given name and type exists, the function will return
   75  * provided default value.
   76  */
   77 
   78 bool dnvlist_take_bool(nvlist_t *nvl, const char *name, bool defval);
   79 uint64_t dnvlist_take_number(nvlist_t *nvl, const char *name, uint64_t defval);
   80 char *dnvlist_take_string(nvlist_t *nvl, const char *name, char *defval);
   81 nvlist_t *dnvlist_take_nvlist(nvlist_t *nvl, const char *name, nvlist_t *defval);
   82 int dnvlist_take_descriptor(nvlist_t *nvl, const char *name, int defval);
   83 void *dnvlist_take_binary(nvlist_t *nvl, const char *name, size_t *sizep, void *defval, size_t defsize);
   84 
   85 __END_DECLS
   86 
   87 #endif  /* !_DNV_H_ */

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