glib/glib.go
func ValueAlloc() (*Value, error) {
	c := C._g_value_alloc()
	if c == nil {
		return nil, errNilPtr
	}

	v := &Value{c}

	//An allocated GValue is not guaranteed to hold a value that can be unset
	//We need to double check before unsetting, to prevent:
	//`g_value_unset: assertion 'G_IS_VALUE (value)' failed`
	runtime.SetFinalizer(v, func(f *Value) {
		if t, _, err := f.Type(); err != nil || t == TYPE_INVALID || t == TYPE_NONE {
			C.g_free(C.gpointer(f.native()))
			return
		}

		f.unset()
	})

	return v, nil
}
func ValueAlloc() (*Value, error) {
	c := C._g_value_alloc()
	if c == nil {
		return nil, errNilPtr
	}

	v := &Value{c}

	//An allocated GValue is not guaranteed to hold a value that can be unset
	//We need to double check before unsetting, to prevent:
	//`g_value_unset: assertion 'G_IS_VALUE (value)' failed`
	runtime.SetFinalizer(v, func(f *Value) {
		if t, _, err := f.Type(); err != nil || t == TYPE_INVALID || t == TYPE_NONE {
			C.g_free(C.gpointer(f.native()))
			return
		}

		f.unset()
	})

	return v, nil
}
// ValueAlloc allocates a Value and sets a runtime finalizer to call
// g_value_unset() on the underlying GValue after leaving scope.
// ValueAlloc() returns a non-nil error if the allocation failed.