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/module.h

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    1 /*-
    2  * Copyright (c) 1997 Doug Rabson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD$
   27  */
   28 
   29 #ifndef _SYS_MODULE_H_
   30 #define _SYS_MODULE_H_
   31 
   32 typedef enum modeventtype {
   33     MOD_LOAD,
   34     MOD_UNLOAD,
   35     MOD_SHUTDOWN
   36 } modeventtype_t;
   37 
   38 typedef struct module *module_t;
   39 
   40 typedef int (*modeventhand_t)(module_t mod, int /*modeventtype_t*/ what,
   41                               void *arg);
   42 
   43 /*
   44  * Struct for registering modules statically via SYSINIT.
   45  */
   46 typedef struct moduledata {
   47         const char      *name;  /* module name */
   48         modeventhand_t  evhand; /* event handler */
   49         void            *priv;  /* extra data */
   50 } moduledata_t;
   51 
   52 /*
   53  * A module can use this to report module specific data to
   54  * the user via kldstat(2).
   55  */
   56 typedef union modspecific {
   57     int         intval;
   58     u_int       uintval;
   59     long        longval;
   60     u_long      ulongval;
   61 } modspecific_t;
   62 
   63 #ifdef _KERNEL
   64 
   65 #define MODULE_METADATA(uniquifier, type, data, cval)
   66 
   67 #define MODULE_DEPEND(mod, dep, min, pref, max)
   68 
   69 #define DECLARE_MODULE(name, data, sub, order) \
   70     SYSINIT(name##module, sub, order, module_register_init, &data) \
   71     struct __hack
   72 
   73 #define MODULE_VERSION(mod, ver)
   74 
   75 void module_register_init(const void *data);
   76 struct linker_file;
   77 int module_register(const struct moduledata *data, struct linker_file *lf);
   78 module_t module_lookupbyname(const char *name);
   79 module_t module_lookupbyid(int modid);
   80 void module_reference(module_t mod);
   81 void module_release(module_t mod);
   82 int module_unload(module_t mod);
   83 int module_getid(module_t mod);
   84 module_t module_getfnext(module_t mod);
   85 void module_setspecific(module_t mod, modspecific_t *datap);
   86 
   87 #ifdef MOD_DEBUG
   88 
   89 extern int mod_debug;
   90 #define MOD_DEBUG_REFS  1
   91 
   92 #define MOD_DPF(cat, args)                                      \
   93         do {                                                    \
   94                 if (mod_debug & MOD_DEBUG_##cat) printf args;   \
   95         } while (0)
   96 
   97 #else
   98 
   99 #define MOD_DPF(cat, args)
  100 
  101 #endif
  102 
  103 #endif /* _KERNEL */
  104 
  105 #define MAXMODNAME      32
  106 
  107 struct module_stat {
  108     int         version;        /* set to sizeof(struct module_stat) */
  109     char        name[MAXMODNAME];
  110     int         refs;
  111     int         id;
  112     modspecific_t data;
  113 };
  114 
  115 #ifndef _KERNEL
  116 
  117 #include <sys/cdefs.h>
  118 
  119 __BEGIN_DECLS
  120 int     modnext(int _modid);
  121 int     modfnext(int _modid);
  122 int     modstat(int _modid, struct module_stat* _stat);
  123 int     modfind(const char *_name);
  124 __END_DECLS
  125 
  126 #endif
  127 
  128 #endif  /* !_SYS_MODULE_H_ */

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