static int caching_list_directory(const char *path, dir_entry **list)
{
pthread_mutex_lock(&dmut);
if (!strcmp(path, "/"))
path = "";
dir_cache *cw;
for (cw = dcache; cw; cw = cw->next)
if (!strcmp(cw->path, path))
break;
if (!cw)
{
if (!cloudfs_list_directory(path, list))
return 0;
cw = new_cache(path);
}
else if (cache_timeout > 0 && (time(NULL) - cw->cached > cache_timeout))
{
if (!cloudfs_list_directory(path, list))
return 0;
cloudfs_free_dir_list(cw->entries);
cw->cached = time(NULL);
}
else
*list = cw->entries;
cw->entries = *list;
pthread_mutex_unlock(&dmut);
return 1;
}
//returns first file entry in linked list. if not in cache will be downloaded.
int caching_list_directory(const char* path, dir_entry** list)
{
debugf(DBG_LEVEL_EXT, "caching_list_directory(%s)", path);
pthread_mutex_lock(&dcachemut);
bool new_entry = false;
if (!strcmp(path, "/"))
path = "";
dir_cache* cw;
for (cw = dcache; cw; cw = cw->next)
{
if (cw->was_deleted == true)
{
debugf(DBG_LEVEL_EXT,
KMAG"caching_list_directory status: dir(%s) is empty as cached expired, reload from cloud",
cw->path);
if (!cloudfs_list_directory(cw->path, list))
debugf(DBG_LEVEL_EXT,
KMAG"caching_list_directory status: cannot reload dir(%s)", cw->path);
else
{
debugf(DBG_LEVEL_EXT, KMAG"caching_list_directory status: reloaded dir(%s)",
cw->path);
//cw->entries = *list;
cw->was_deleted = false;
cw->cached = time(NULL);
}
}
if (cw->was_deleted == false)
{
if (!strcmp(cw->path, path))
break;
}
}
if (!cw)
{
//trying to download this entry from cloud, list will point to cached or downloaded entries
if (!cloudfs_list_directory(path, list))
{
//download was not ok
pthread_mutex_unlock(&dcachemut);
debugf(DBG_LEVEL_EXT,
"exit 0: caching_list_directory(%s) "KYEL"[CACHE-DIR-MISS]", path);
return 0;
}
debugf(DBG_LEVEL_EXT,
"caching_list_directory: new_cache(%s) "KYEL"[CACHE-CREATE]", path);
cw = new_cache(path);
new_entry = true;
}
else if (cache_timeout > 0 && (time(NULL) - cw->cached > cache_timeout))
{
if (!cloudfs_list_directory(path, list))
{
//mutex unlock was forgotten
pthread_mutex_unlock(&dcachemut);
debugf(DBG_LEVEL_EXT, "exit 1: caching_list_directory(%s)", path);
return 0;
}
//fixme: this frees dir subentries but leaves the dir parent entry, this confuses path_info
//which believes this dir has no entries
if (cw->entries != NULL)
{
cloudfs_free_dir_list(cw->entries);
cw->was_deleted = true;
cw->cached = time(NULL);
debugf(DBG_LEVEL_EXT, "caching_list_directory(%s) "KYEL"[CACHE-EXPIRED]",
path);
}
else
{
debugf(DBG_LEVEL_EXT,
"got NULL on caching_list_directory(%s) "KYEL"[CACHE-EXPIRED w NULL]", path);
pthread_mutex_unlock(&dcachemut);
return 0;
}
}
else
{
debugf(DBG_LEVEL_EXT, "caching_list_directory(%s) "KGRN"[CACHE-DIR-HIT]",
path);
*list = cw->entries;
}
//adding new dir file list to global cache, now this dir becomes visible in cache
cw->entries = *list;
pthread_mutex_unlock(&dcachemut);
debugf(DBG_LEVEL_EXT, "exit 2: caching_list_directory(%s)", path);
return 1;
}