Struct
GObjectWeakRef
Description [src]
struct GWeakRef {
/* No available fields */
}
A structure containing a weak reference to a GObject.
A GWeakRef can either be empty (i.e. point to NULL), or point to an
object for as long as at least one “strong” reference to that object
exists. Before the object’s GObjectClass.dispose method is called,
every GWeakRef associated with becomes empty (i.e. points to NULL).
Like GValue, GWeakRef can be statically allocated, stack- or
heap-allocated, or embedded in larger structures.
Unlike g_object_weak_ref() and g_object_add_weak_pointer(), this weak
reference is thread-safe: converting a weak pointer to a reference is
atomic with respect to invalidation of weak pointers to destroyed objects.
If the object’s GObjectClass.dispose method results in additional
references to the object being held (‘re-referencing’), any GWeakRefs taken
before it was disposed will continue to point to NULL. Any GWeakRefs taken
during disposal and after re-referencing, or after disposal has returned due
to the re-referencing, will continue to point to the object until its refcount
goes back to zero, at which point they too will be invalidated.
It is invalid to take a GWeakRef on an object during GObjectClass.dispose
without first having or creating a strong reference to the object.
Instance methods
g_weak_ref_clear
Frees resources associated with a non-statically-allocated GWeakRef.
After this call, the GWeakRef is left in an undefined state.
since: 2.32
g_weak_ref_get
If weak_ref is not empty, atomically acquire a strong
reference to the object it points to, and return that reference.
since: 2.32