Sweden-Number/server/device.c

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/*
* Server-side device management
*
* Copyright (C) 1999 Alexandre Julliard
*/
/*
* FIXME:
* all this stuff is a simple hack to avoid breaking
* client-side device support.
*/
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "winerror.h"
#include "winbase.h"
#include "handle.h"
#include "thread.h"
struct device
{
struct object obj; /* object header */
int id; /* client identifier */
};
static void device_dump( struct object *obj, int verbose );
static int device_get_info( struct object *obj, struct get_file_info_reply *reply );
static void device_destroy( struct object *obj );
static const struct object_ops device_ops =
{
device_dump,
no_add_queue,
NULL, /* should never get called */
NULL, /* should never get called */
NULL, /* should never get called */
no_read_fd,
no_write_fd,
no_flush,
device_get_info,
device_destroy
};
static struct object *create_device( int id )
{
struct device *dev;
if (!(dev = mem_alloc(sizeof(*dev)))) return NULL;
init_object( &dev->obj, &device_ops, NULL );
dev->id = id;
return &dev->obj;
}
static void device_dump( struct object *obj, int verbose )
{
struct device *dev = (struct device *)obj;
assert( obj->ops == &device_ops );
fprintf( stderr, "Device id=%08x\n", dev->id );
}
static int device_get_info( struct object *obj, struct get_file_info_reply *reply )
{
struct device *dev = (struct device *)obj;
assert( obj->ops == &device_ops );
memset( reply, 0, sizeof(*reply) );
reply->type = FILE_TYPE_UNKNOWN;
reply->attr = dev->id; /* hack! */
return 1;
}
static void device_destroy( struct object *obj )
{
struct device *dev = (struct device *)obj;
assert( obj->ops == &device_ops );
free( dev );
}
/* create a device */
DECL_HANDLER(create_device)
{
struct object *obj;
struct create_device_reply reply = { -1 };
if ((obj = create_device( req->id )))
{
reply.handle = alloc_handle( current->process, obj,
req->access, req->inherit );
release_object( obj );
}
send_reply( current, -1, 1, &reply, sizeof(reply) );
}