int
mu_list_create (mu_list_t *plist)
{
mu_list_t list;
int status;
if (plist == NULL)
return MU_ERR_OUT_PTR_NULL;
list = calloc (sizeof (*list), 1);
if (list == NULL)
return ENOMEM;
status = mu_monitor_create (&list->monitor, 0, list);
if (status != 0)
{
free (list);
return status;
}
list->head.next = &list->head;
list->head.prev = &list->head;
*plist = list;
return 0;
}
/* A folder could be remote (IMAP), or local(a spool directory) like $HOME/Mail
etc .. We maintain a list of known folders to avoid creating multiple
folders for the same URL. So, when mu_folder_create is called we check if
we already have a folder for that URL and return it, otherwise we create a
new one. Downsides: the scheme to detect the same URL is very weak, and
there could be cases where you'll want a different folder for the same URL,
there is not easy way to do this. */
int
mu_folder_create_from_record (mu_folder_t *pfolder, mu_url_t url,
mu_record_t record)
{
if (!pfolder)
return MU_ERR_OUT_PTR_NULL;
if (record ||
/* Look in the registrar list(iterator), for a possible concrete mailbox
implementation that could match the URL. */
mu_registrar_lookup_url (url, MU_FOLDER_ATTRIBUTE_DIRECTORY, &record,
NULL) == 0)
{
int (*f_init) (mu_folder_t) = NULL;
mu_record_get_folder (record, &f_init);
if (f_init)
{
int status, mask;
mu_folder_t folder;
int (*u_init) (mu_url_t) = NULL;
status = mu_record_check_url (record, url, &mask);
if (status)
/* FIXME: mask would provide more info */
return status;
mu_record_get_url (record, &u_init);
if (u_init)
{
status = u_init (url);
if (status)
return status;
}
mu_monitor_wrlock (&folder_lock);
/* Check if we already have the same URL folder. */
if (is_known_folder (url, &folder))
{
folder->ref++;
*pfolder = folder;
mu_url_destroy (&url); /* FIXME: Hmm */
mu_monitor_unlock (&folder_lock);
return 0;
}
else
mu_monitor_unlock (&folder_lock);
/* Create a new folder. */
/* Allocate memory for the folder. */
folder = calloc (1, sizeof (*folder));
if (folder != NULL)
{
folder->url = url;
/* Initialize the internal foilder lock, now so the
concrete folder could use it. */
status = mu_monitor_create (&folder->monitor, 0, folder);
if (status == 0)
{
/* Create the concrete folder type. */
status = f_init (folder);
if (status == 0)
{
if (!folder->_match)
folder->_match = mu_folder_imap_match;
*pfolder = folder;
folder->ref++;
/* Put on the internal list of known folders. */
if (known_folder_list == NULL)
mu_list_create (&known_folder_list);
mu_list_append (known_folder_list, folder);
}
}
/* Something went wrong, destroy the object. */
if (status)
{
if (folder->monitor)
mu_monitor_destroy (&folder->monitor, folder);
free (folder);
}
}
return status;
}
}
return MU_ERR_NOENT;
}
