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 #include "server/thread.h"
  22
  23 struct device
  24 {
  25     struct object  obj;             /* object header */
  26     int            id;              /* client identifier */
  27 };
  28
  29 static void device_dump( struct object *obj, int verbose );
  30 static int device_get_info( struct object *obj, struct get_file_info_reply *reply );
  31 static void device_destroy( struct object *obj );
  32
  33 static const struct object_ops device_ops =
  34 {
  35     device_dump,
  36     no_add_queue,
  37     NULL,  /* should never get called */
  38     NULL,  /* should never get called */
  39     NULL,  /* should never get called */
  40     no_read_fd,
  41     no_write_fd,
  42     no_flush,
  43     device_get_info,
  44     device_destroy
  45 };
  46
  47 struct object *create_device( int id )
  48 {
  49     struct device *dev;
  50
  51     if (!(dev = mem_alloc(sizeof(*dev)))) return NULL;
  52     init_object( &dev->obj, &device_ops, NULL );
  53     dev->id = id;
  54     return &dev->obj;
  55 }
  56
  57 static void device_dump( struct object *obj, int verbose )
  58 {
  59     struct device *dev = (struct device *)obj;
  60     assert( obj->ops == &device_ops );
  61     fprintf( stderr, "Device id=%08x\n", dev->id );
  62 }
  63
  64 static int device_get_info( struct object *obj, struct get_file_info_reply *reply )
  65 {
  66     struct device *dev = (struct device *)obj;
  67     assert( obj->ops == &device_ops );
  68     memset( reply, 0, sizeof(*reply) );
  69     reply->type = FILE_TYPE_UNKNOWN;
  70     reply->attr = dev->id;  /* hack! */
  71     return 1;
  72 }
  73
  74 static void device_destroy( struct object *obj )
  75 {
  76     struct device *dev = (struct device *)obj;
  77     assert( obj->ops == &device_ops );
  78     free( dev );
  79 }