| Copyright | Will Thompson, Iñaki García Etxebarria and Jonas Platte |
|---|---|
| License | LGPL-2.1 |
| Maintainer | Iñaki García Etxebarria (garetxe@gmail.com) |
| Safe Haskell | None |
| Language | Haskell2010 |
GI.GObject.Structs.WeakRef
Contents
Description
A structure containing a weak reference to a #GObject. It 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 GWeakRef associated with becomes empty (i.e. points to %NULL).
Like 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, any #GWeakRefs taken before it was disposed will continue to point to %NULL. If #GWeakRefs are taken after the object is disposed and re-referenced, they will continue to point to it until its refcount goes back to zero, at which point they too will be invalidated.