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),
  38     device_dump,
  39     no_add_queue,
  40     NULL,  /* should never get called */
  41     NULL,  /* should never get called */
  42     NULL,  /* should never get called */
  43     no_read_fd,
  44     no_write_fd,
  45     no_flush,
  46     device_get_info,
  47     no_destroy
  48 };
  49
  50 static struct device *create_device( int id )
  51 {
  52     struct device *dev;
  53     if ((dev = alloc_object( &device_ops )))
  54     {
  55         dev->id = id;
  56     }
  57     return dev;
  58 }
  59
  60 static void device_dump( struct object *obj, int verbose )
  61 {
  62     struct device *dev = (struct device *)obj;
  63     assert( obj->ops == &device_ops );
  64     fprintf( stderr, "Device id=%08x\n", dev->id );
  65 }
  66
  67 static int device_get_info( struct object *obj, struct get_file_info_request *req )
  68 {
  69     struct device *dev = (struct device *)obj;
  70     assert( obj->ops == &device_ops );
  71     req->type        = FILE_TYPE_UNKNOWN;
  72     req->attr        = dev->id;  /* hack! */
  73     req->access_time = 0;
  74     req->write_time  = 0;
  75     req->size_high   = 0;
  76     req->size_low    = 0;
  77     req->links       = 0;
  78     req->index_high  = 0;
  79     req->index_low   = 0;
  80     req->serial      = 0;
  81     return 1;
  82 }
  83
  84 /* create a device */
  85 DECL_HANDLER(create_device)
  86 {
  87     struct device *dev;
  88
  89     req->handle = -1;
  90     if ((dev = create_device( req->id )))
  91     {
  92         req->handle = alloc_handle( current->process, dev, req->access, req->inherit );
  93         release_object( dev );
  94     }
  95 }