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DEV_MODULE (9)

>> DEV_MODULE (9) ( FreeBSD man: Ядро )

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NAME



DEV_MODULE

 - device driver module declaration macro

SYNOPSIS

   #include <sys/param.h>
   #include <sys/kernel.h>
   #include <sys/module.h>
   #include <sys/conf.h>
DEV_MODULE (name modeventhand_t evh void *arg);

DESCRIPTION

The DEV_MODULE ();
macro declares a device driver kernel module. It fills in a Vt moduledata_t structure and then calls DECLARE_MODULE ();
with the correct args, where Fa name is the name of the module and Fa evh (with its argument Fa arg ) is the event handler for the module (refer to DECLARE_MODULE9 for more information). The event handler is supposed to create the device with make_dev ();
on load and to destroy it when it is unloaded using destroy_dev (.);

EXAMPLES

#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;          /* Success*/

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

    default:
        err = EINVAL;
        break;
    }

    return(err);
}

DEV_MODULE(foo, foo_load, NULL);

AUTHORS

This manual page was written by An Alexander Langer Aq alex@FreeBSD.org .

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Created 1996-2024 by Maxim Chirkov
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