.\" -*- nroff -*-
.\"
.\" Copyright (c) 2001 Alexander Langer
.\"
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.\" %FreeBSD: src/share/man/man9/DEV_MODULE.9,v 1.4 2001/12/26 23:14:04 davidc Exp %
.\"
.\" $FreeBSD$
.Dd March 11, 2001
.Dt DEV_MODULE 9
.Os
.Sh 名称
.Nm DEV_MODULE
.Nd デバイスドライバモジュール宣言マクロ
.Sh 書式
.In sys/param.h
.In sys/kernel.h
.In sys/module.h
.In sys/conf.h
.Fn DEV_MODULE "name" "modeventhand_t evh" "void *arg"
.Sh 解説
.Fn DEV_MODULE
マクロはデバイスドライバカーネルモジュールを宣言します。
これは
.Vt moduledata_t
構造体を埋めて、それから
.Fn DECLARE_MODULE
を正しい引数で呼び出します。ここで、
.Fa name
はモジュール名で、
.Fa ( arg
を引数として持つ)
.Fa evh
はそのモジュールのためのイベントハンドラです (詳細については
.Xr DECLARE_MODULE 9
を参照)。
イベントハンドラはロード時に
.Fn make_dev
でデバイスを作成し、アンロードされる時に
.Fn destroy_dev
でそのデバイスを破壊することを、期待されています。
.Sh 使用例
.Bd -literal
#include <sys/module.h>
#include <sys/conf.h>

static struct cdevsw foo_devsw = { ... };

static dev_t sdev;

static int
foo_load(module_t mod, int cmd, void *arg)
{
    int err = 0;

    switch (cmd) {
    case MOD_LOAD:
        sdev = make_dev(&foo_devsw, 0, UID_ROOT, GID_WHEEL, 0600, "foo");
        break;          /* 成功 */

    case MOD_UNLOAD:
    case MOD_SHUTDOWN:
        destroy_dev(sdev);
        break;          /* 成功 */

    default:
        err = EINVAL;
        break;
    }

    return(err);
}

DEV_MODULE(foo, foo_load, NULL);
.Ed
.Sh 関連項目
.Xr DECLARE_MODULE 9 ,
.Xr destroy_dev 9 ,
.Xr make_dev 9 ,
.Xr module 9
.Sh 作者
このマニュアルページは
.An Alexander Langer Aq alex@FreeBSD.org
が書きました。