std::experimental::atomic_weak_ptr<T>::exchange

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.

# Declarations

weak_ptr<T> exchange( weak_ptr<T> desired, std::memory_order order = std::memory_order_seq_cst ) noexcept;

# Parameters

• desired: value to assign
• order: memory order constraints to enforce

# Return value

The value of the atomic variable before the call.

# See also

• std::atomic_is_lock_free(std::shared_ptr)std::atomic_load(std::shared_ptr)std::atomic_load_explicit(std::shared_ptr)std::atomic_store(std::shared_ptr)std::atomic_store_explicit(std::shared_ptr)std::atomic_exchange(std::shared_ptr)std::atomic_exchange_explicit(std::shared_ptr)std::atomic_compare_exchange_weak(std::shared_ptr)std::atomic_compare_exchange_strong(std::shared_ptr)std::atomic_compare_exchange_weak_explicit(std::shared_ptr)std::atomic_compare_exchange_strong_explicit(std::shared_ptr)