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module.h
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/
module.h
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/*-
* Copyright (c) 1997 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: module.h,v 1.6 1999/01/09 14:59:49 dfr Exp $
*/
#ifndef _SYS_MODULE_H_
#define _SYS_MODULE_H_
typedef enum modeventtype {
MOD_LOAD,
MOD_UNLOAD,
MOD_SHUTDOWN
} modeventtype_t;
typedef struct module *module_t;
typedef int (*modeventhand_t)(module_t mod, int /*modeventtype_t*/ what,
void *arg);
/*
* Struct for registering modules statically via SYSINIT.
*/
typedef struct moduledata {
char *name; /* module name */
modeventhand_t evhand; /* event handler */
void *priv; /* extra data */
void *_file; /* private; used by linker */
} moduledata_t;
/*
* A module can use this to report module specific data to
* the user via kldstat(2).
*/
typedef union modspecific {
int intval;
u_int uintval;
long longval;
u_long ulongval;
} modspecific_t;
#ifdef KERNEL
#define DECLARE_MODULE(name, data, sub, order) \
SYSINIT(name##module, sub, order, module_register_init, &data) \
struct __hack
void module_register_init(void *data);
int module_register(const char *name, modeventhand_t callback, void *arg,
void *file);
module_t module_lookupbyname(const char *name);
module_t module_lookupbyid(int modid);
void module_reference(module_t mod);
void module_release(module_t mod);
int module_unload(module_t mod);
int module_getid(module_t mod);
module_t module_getfnext(module_t mod);
void module_setspecific(module_t mod, modspecific_t *datap);
#ifdef MOD_DEBUG
extern int mod_debug;
#define MOD_DEBUG_REFS 1
#define MOD_DPF(cat, args) \
do { \
if (mod_debug & MOD_DEBUG_##cat) printf args; \
} while (0)
#else
#define MOD_DPF(cat, args)
#endif
#endif /* KERNEL */
#define MAXMODNAME 32
struct module_stat {
int version; /* set to sizeof(struct module_stat) */
char name[MAXMODNAME];
int refs;
int id;
modspecific_t data;
};
#ifndef KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
int modnext(int modid);
int modfnext(int modid);
int modstat(int modid, struct module_stat* stat);
int modfind(char *name);
__END_DECLS
#endif
#endif /* !_SYS_MODULE_H_ */