server/device.c

   1 /*
   2  * Server-side device management
   3  *
   4  * Copyright (C) 1999 Alexandre Julliard
   5  */
   6
   7 /*
   8  * FIXME:
   9  * all this stuff is a simple hack to avoid breaking
  10  * client-side device support.
  11  */
  12
  13 #include <assert.h>
  14 #include <fcntl.h>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18
  19 #include "winerror.h"
  20 #include "winbase.h"
  21
  22 #include "handle.h"
  23 #include "thread.h"
  24 #include "request.h"
  25
  26 struct device
  27 {
  28     struct object  obj;             /* object header */
  29     int            id;              /* client identifier */
  30 };
  31
  32 static void device_dump( struct object *obj, int verbose );
  33 static int device_get_info( struct object *obj, struct get_file_info_request *req );
  34
  35 static const struct object_ops device_ops =
  36 {
  37     sizeof(struct device),    /* size */
  38     device_dump,              /* dump */
  39     no_add_queue,             /* add_queue */
  40     NULL,                     /* remove_queue */
  41     NULL,                     /* signaled */
  42     NULL,                     /* satisfied */
  43     NULL,                     /* get_poll_events */
  44     NULL,                     /* poll_event */
  45     no_read_fd,               /* get_read_fd */
  46     no_write_fd,              /* get_write_fd */
  47     no_flush,                 /* flush */
  48     device_get_info,          /* get_file_info */
  49     no_destroy                /* destroy */
  50 };
  51
  52 static struct device *create_device( int id )
  53 {
  54     struct device *dev;
  55     if ((dev = alloc_object( &device_ops, -1 )))
  56     {
  57         dev->id = id;
  58     }
  59     return dev;
  60 }
  61
  62 static void device_dump( struct object *obj, int verbose )
  63 {
  64     struct device *dev = (struct device *)obj;
  65     assert( obj->ops == &device_ops );
  66     fprintf( stderr, "Device id=%08x\n", dev->id );
  67 }
  68
  69 static int device_get_info( struct object *obj, struct get_file_info_request *req )
  70 {
  71     struct device *dev = (struct device *)obj;
  72     assert( obj->ops == &device_ops );
  73     req->type        = FILE_TYPE_UNKNOWN;
  74     req->attr        = dev->id;  /* hack! */
  75     req->access_time = 0;
  76     req->write_time  = 0;
  77     req->size_high   = 0;
  78     req->size_low    = 0;
  79     req->links       = 0;
  80     req->index_high  = 0;
  81     req->index_low   = 0;
  82     req->serial      = 0;
  83     return 1;
  84 }
  85
  86 /* create a device */
  87 DECL_HANDLER(create_device)
  88 {
  89     struct device *dev;
  90
  91     req->handle = -1;
  92     if ((dev = create_device( req->id )))
  93     {
  94         req->handle = alloc_handle( current->process, dev, req->access, req->inherit );
  95         release_object( dev );
  96     }
  97 }