server/device.c

   1 /*
   2  * Server-side device management
   3  *
   4  * Copyright (C) 1999 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /*
  22  * FIXME:
  23  * all this stuff is a simple hack to avoid breaking
  24  * client-side device support.
  25  */
  26
  27 #include <assert.h>
  28 #include <fcntl.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include "winbase.h"
  34
  35 #include "handle.h"
  36 #include "thread.h"
  37 #include "request.h"
  38
  39 struct device
  40 {
  41     struct object  obj;             /* object header */
  42     int            id;              /* client identifier */
  43 };
  44
  45 static void device_dump( struct object *obj, int verbose );
  46
  47 static const struct object_ops device_ops =
  48 {
  49     sizeof(struct device),    /* size */
  50     device_dump,              /* dump */
  51     no_add_queue,             /* add_queue */
  52     NULL,                     /* remove_queue */
  53     NULL,                     /* signaled */
  54     NULL,                     /* satisfied */
  55     no_get_fd,                /* get_fd */
  56     no_destroy                /* destroy */
  57 };
  58
  59 static struct device *create_device( int id )
  60 {
  61     struct device *dev;
  62     if ((dev = alloc_object( &device_ops )))
  63     {
  64         dev->id = id;
  65     }
  66     return dev;
  67 }
  68
  69 static void device_dump( struct object *obj, int verbose )
  70 {
  71     struct device *dev = (struct device *)obj;
  72     assert( obj->ops == &device_ops );
  73     fprintf( stderr, "Device id=%08x\n", dev->id );
  74 }
  75
  76 /* create a device */
  77 DECL_HANDLER(create_device)
  78 {
  79     struct device *dev;
  80
  81     reply->handle = 0;
  82     if ((dev = create_device( req->id )))
  83     {
  84         reply->handle = alloc_handle( current->process, dev, req->access, req->inherit );
  85         release_object( dev );
  86     }
  87 }
  88
  89
  90 /* Retrieve the client private id for a device */
  91 DECL_HANDLER(get_device_id)
  92 {
  93     struct device *dev;
  94
  95     if ((dev = (struct device *)get_handle_obj( current->process, req->handle, 0, &device_ops )))
  96     {
  97         reply->id = dev->id;
  98         release_object( dev );
  99     }
 100 }