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