Container for all the objects of a given type.
- each item is identified by a string name/identifier;
- the lib itself is a dictionary from the element id to the element;
- the element itself is represented aby the xbt_dictelm_t;
- the element can store any number of associated facets/data structures (corresponding to the different layers of SimGrid or its extensions) in ((void**)dictelt->content)[level];
- each level is allocated in the lib with
xbt_lib_add_level
.
// Define a collection for the foo objects and two associated facets:
typedef xbt_dictelm_t foo_t;
xbt_lib_t foo_lib = xbt_lib_new();
int BAR_FOO_LEVEL = xbt_lib_add_level(foo_lib, free_bar);
int AUTH_FOO_LEVEL = xbt_lib_add_level(foo_lib, free_auth);
// Store a bar:
bar_t bar = bar_new();
char* id = bar_name(bar);
xbt_lib_set(id, id, BAR_FOO_LEVEL, bar);
// Find the corresponding foo and the facet again:
foo_t foo = xbt_lib_get_elm_or_null(foo_lib, id);
bar_t bar2 = (bar_t) xbt_lib_get_level(foo, BAR_FOO_LEVEL);
assert(bar == bar2);
// Add authentication facet for the previous object:
auth_t auth = auth_new();
xbt_lib_set(foo_lib, id, AUTH_FOO_LEVEL, auth);