asynchronous - C Glib GIO - How to list files asynchronously -
i creating simple file viewer using gtk, , want load new directory asynchronously, prevent hanging whole program while loading.
in gio api there g_file_enumerator_next_files_async function, allows asynchronously load files in blocks. how can tell, when directory listing finished? here code sample of i'm came with:
static void add_file_callback(gobject *direnum, gasyncresult *result, gpointer user_data){ gerror *error = null; glist *file_list = g_file_enumerator_next_files_finish( g_file_enumerator(direnum), result, &error); if( file_list == null ){ g_critical("unable add files list, error: %s", error->message); } glist *next; gfileinfo *info; gtktreeiter iter; dirlist *list = (dirlist*)user_data; while(file_list){ ...add file list } } int read_dir(const gchar *path, dirlist *list){ g_assert(list != null && list->store != null); gtktreeiter iter; gtk_list_store_clear(list->store); list->path = path; gfile *dir = g_file_new_for_path(path); gfileenumerator *dirent = g_file_enumerate_children(dir, "*", g_file_query_info_nofollow_symlinks, null, null); while( true ){ /* <============================== when end? */ g_file_enumerator_next_files_async(dirent, block_size, g_priority_default, null, add_file_callback, list); } g_file_enumerator_close(dirent, null, null); g_object_unref(dirent); g_object_unref(dir); return 0; }
from this g_file_enumerator_next_files_async reference:
the callback can called less
num_filesfiles in case of error or @ end of enumerator.
so if number of files callback receives less block_size, know have error or no more files available.
if happens, set flag loop in read_dir checks.
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