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     change_destroy
  37 };
  38
  39
  40 struct object *create_change_notification( int subtree, int filter )
  41 {
  42     struct change *change;
  43     if (!(change = mem_alloc( sizeof(*change) ))) return NULL;
  44     init_object( &change->obj, &change_ops, NULL );
  45     change->subtree = subtree;
  46     change->filter  = filter;
  47     return &change->obj;
  48 }
  49
  50 static void change_dump( struct object *obj, int verbose )
  51 {
  52     struct change *change = (struct change *)obj;
  53     assert( obj->ops == &change_ops );
  54     printf( "Change notification sub=%d filter=%08x\n",
  55             change->subtree, change->filter );
  56 }
  57
  58 static int change_signaled( struct object *obj, struct thread *thread )
  59 {
  60 /*    struct change *change = (struct change *)obj;*/
  61     assert( obj->ops == &change_ops );
  62     return 0;  /* never signaled for now */
  63 }
  64
  65 static void change_destroy( struct object *obj )
  66 {
  67     struct change *change = (struct change *)obj;
  68     assert( obj->ops == &change_ops );
  69     free( change );
  70 }