/**
* _kh_cancel_sub:
* @sub a #kqueue_sub
*
* Stops monitoring on a subscription.
*
* Returns: %TRUE
**/
gboolean
_kh_cancel_sub (kqueue_sub *sub)
{
gboolean removed = FALSE;
g_assert (kqueue_socket_pair[0] != -1);
g_assert (sub != NULL);
_km_remove (sub);
G_LOCK (hash_lock);
removed = g_hash_table_remove (subs_hash_table, GINT_TO_POINTER (sub->fd));
G_UNLOCK (hash_lock);
if (removed)
{
/* fd will be closed in the kqueue thread */
_kqueue_thread_remove_fd (sub->fd);
/* Bump the kqueue thread. It will pick up a new sub entry to remove*/
if (!_ku_write (kqueue_socket_pair[0], "R", 1))
KH_W ("Failed to bump the kqueue thread (remove fd, error %d)", errno);
}
return TRUE;
}
/**
* _kh_cancel_sub:
* @sub a #kqueue_sub
*
* Stops monitoring on a subscription.
*
* Returns: %TRUE
**/
gboolean
_kh_cancel_sub (kqueue_sub *sub)
{
gboolean missing = FALSE;
g_assert (kqueue_socket_pair[0] != -1);
g_assert (sub != NULL);
G_LOCK (hash_lock);
missing = !g_hash_table_remove (subs_hash_table, GINT_TO_POINTER (sub->fd));
G_UNLOCK (hash_lock);
if (missing)
{
/* If there were no fd for this subscription, file is still
* missing. */
KH_W ("Removing subscription from missing");
_km_remove (sub);
}
else
{
/* fd will be closed in the kqueue thread */
_kqueue_thread_remove_fd (sub->fd);
/* Bump the kqueue thread. It will pick up a new sub entry to remove*/
if (!_ku_write (kqueue_socket_pair[0], "R", 1))
KH_W ("Failed to bump the kqueue thread (remove fd, error %d)", errno);
}
return TRUE;
}
/**
* _kh_start_watching:
* @sub: a #kqueue_sub
*
* Starts watching on a subscription.
*
* Returns: %TRUE on success, %FALSE otherwise.
**/
gboolean
_kh_start_watching (kqueue_sub *sub)
{
g_assert (kqueue_socket_pair[0] != -1);
g_assert (sub != NULL);
g_assert (sub->filename != NULL);
/* kqueue requires a file descriptor to monitor. Sad but true */
#if defined (O_EVTONLY)
sub->fd = open (sub->filename, O_EVTONLY);
#else
sub->fd = open (sub->filename, O_RDONLY);
#endif
if (sub->fd == -1)
{
KH_W ("failed to open file %s (error %d)", sub->filename, errno);
return FALSE;
}
_ku_file_information (sub->fd, &sub->is_dir, NULL);
if (sub->is_dir)
{
/* I know, it is very bad to make such decisions in this way and here.
* We already do have an user_data at the #kqueue_sub, and it may point to
* GKqueueFileMonitor or GKqueueDirectoryMonitor. For a directory case,
* we need to scan in contents for the further diffs. Ideally this process
* should be delegated to the GKqueueDirectoryMonitor, but for now I will
* do it in a dirty way right here. */
if (sub->deps)
dl_free (sub->deps);
sub->deps = dl_listing (sub->filename);
}
G_LOCK (hash_lock);
g_hash_table_insert (subs_hash_table, GINT_TO_POINTER (sub->fd), sub);
G_UNLOCK (hash_lock);
_kqueue_thread_push_fd (sub->fd);
/* Bump the kqueue thread. It will pick up a new sub entry to monitor */
if (!_ku_write (kqueue_socket_pair[0], "A", 1))
KH_W ("Failed to bump the kqueue thread (add fd, error %d)", errno);
return TRUE;
}