server/change.c

   1 /*
   2  * Server-side change notification management
   3  *
   4  * Copyright (C) 1998 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10
  11 #include "winerror.h"
  12 #include "winnt.h"
  13 #include "server/thread.h"
  14
  15 struct change
  16 {
  17     struct object  obj;      /* object header */
  18     int            subtree;  /* watch all the subtree */
  19     int            filter;   /* notification filter */
  20 };
  21
  22 static void change_dump( struct object *obj, int verbose );
  23 static int change_signaled( struct object *obj, struct thread *thread );
  24 static void change_destroy( struct object *obj );
  25
  26 static const struct object_ops change_ops =
  27 {
  28     change_dump,
  29     add_queue,
  30     remove_queue,
  31     change_signaled,
  32     no_satisfied,
  33     no_read_fd,
  34     no_write_fd,
  35     no_flush,
  36     no_get_file_info,
  37     change_destroy
  38 };
  39
  40
  41 struct object *create_change_notification( int subtree, int filter )
  42 {
  43     struct change *change;
  44     if (!(change = mem_alloc( sizeof(*change) ))) return NULL;
  45     init_object( &change->obj, &change_ops, NULL );
  46     change->subtree = subtree;
  47     change->filter  = filter;
  48     return &change->obj;
  49 }
  50
  51 static void change_dump( struct object *obj, int verbose )
  52 {
  53     struct change *change = (struct change *)obj;
  54     assert( obj->ops == &change_ops );
  55     fprintf( stderr, "Change notification sub=%d filter=%08x\n",
  56              change->subtree, change->filter );
  57 }
  58
  59 static int change_signaled( struct object *obj, struct thread *thread )
  60 {
  61 /*    struct change *change = (struct change *)obj;*/
  62     assert( obj->ops == &change_ops );
  63     return 0;  /* never signaled for now */
  64 }
  65
  66 static void change_destroy( struct object *obj )
  67 {
  68     struct change *change = (struct change *)obj;
  69     assert( obj->ops == &change_ops );
  70     free( change );
  71 }