Sweden-Number/server/change.c

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C
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/*
* Server-side change notification management
*
* Copyright (C) 1998 Alexandre Julliard
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include "winnt.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
struct change
{
struct object obj; /* object header */
int subtree; /* watch all the subtree */
int filter; /* notification filter */
};
static void change_dump( struct object *obj, int verbose );
static int change_signaled( struct object *obj, struct thread *thread );
static const struct object_ops change_ops =
{
sizeof(struct change), /* size */
change_dump, /* dump */
add_queue, /* add_queue */
remove_queue, /* remove_queue */
change_signaled, /* signaled */
no_satisfied, /* satisfied */
NULL, /* get_poll_events */
NULL, /* poll_event */
no_read_fd, /* get_read_fd */
no_write_fd, /* get_write_fd */
no_flush, /* flush */
no_get_file_info, /* get_file_info */
no_destroy /* destroy */
};
static struct change *create_change_notification( int subtree, int filter )
{
struct change *change;
if ((change = alloc_object( &change_ops, -1 )))
{
change->subtree = subtree;
change->filter = filter;
}
return change;
}
static void change_dump( struct object *obj, int verbose )
{
struct change *change = (struct change *)obj;
assert( obj->ops == &change_ops );
fprintf( stderr, "Change notification sub=%d filter=%08x\n",
change->subtree, change->filter );
}
static int change_signaled( struct object *obj, struct thread *thread )
{
/* struct change *change = (struct change *)obj;*/
assert( obj->ops == &change_ops );
return 0; /* never signaled for now */
}
/* create a change notification */
DECL_HANDLER(create_change_notification)
{
struct change *change;
req->handle = -1;
if ((change = create_change_notification( req->subtree, req->filter )))
{
req->handle = alloc_handle( current->process, change,
STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE, 0 );
release_object( change );
}
}