std::experimental::atomic_weak_ptr<T>:: exchange
|
weak_ptr
<
T
>
exchange
(
weak_ptr
<
T
>
desired,
std::
memory_order
order
=
std::
memory_order_seq_cst
)
noexcept
;
|
||
Atomically replaces the underlying
weak_ptr
with
desired
. The operation is a read-modify-write operation. Memory is affected according to the value of
order
.
Parameters
| desired | - | value to assign |
| order | - | memory order constraints to enforce |
Return value
The value of the atomic variable before the call.
Remarks
All changes to the
atomic_weak_ptr
object itself, and all associated
use_count
increments, are guaranteed to be performed atomically. Associated
use_count
decrements take place after the atomic operation, but are not required to be part of it. Any associated destruction or deallocation operations take place after the atomic operation and are not part of it.
See also
specializes atomic operations for
std::shared_ptr
(function template) |