Destroys the dataset, freeing all memory allocated, and calling any destroy functions set for data elements.
Calls the given function for each data element which is associated with the given location. Note that this function is NOT thread-safe. So unless datalist can be protected from any modifications during invocation of this function, it should not be called.
Gets the data element corresponding to a GQuark.
Removes an element, without calling its destroy notification function.
Sets the data element associated with the given GQuark id, and also the function to call when the data element is destroyed. Any previous data with the same key is removed, and its destroy function is called.
Description Datasets associate groups of data elements with particular memory locations. These are useful if you need to associate data with a structure returned from an external library. Since you cannot modify the structure, you use its location in memory as the key into a dataset, where you can associate any number of data elements with it. There are two forms of most of the dataset functions. The first form uses strings to identify the data elements associated with a location. The second form uses GQuark identifiers, which are created with a call to g_quark_from_string() or g_quark_from_static_string(). The second form is quicker, since it does not require looking up the string in the hash table of GQuark identifiers. There is no function to create a dataset. It is automatically created as soon as you add elements to it. To add data elements to a dataset use g_dataset_id_set_data(), g_dataset_id_set_data_full(), g_dataset_set_data() and g_dataset_set_data_full(). To get data elements from a dataset use g_dataset_id_get_data() and g_dataset_get_data(). To iterate over all data elements in a dataset use g_dataset_foreach() (not thread-safe). To remove data elements from a dataset use g_dataset_id_remove_data() and g_dataset_remove_data(). To destroy a dataset, use g_dataset_destroy().