Futures Library: Shared State

Shared state objects.

Futures / Shared State

Classes

Classes	Description
packaged_task< R(Args...), Options >	A packaged task that sets a shared state when done. (class)
promise_base	Common members to promises of all types. (class)
promise	A shared state that will later be acquired by a future type. (class)

Functions

Member Functions	Description
swap	Specializes the std::swap algorithm. (function template)

Functions

function swap

^{Defined in headers <futures/packaged_task.hpp>, <futures/promise.hpp>}

(1)

template <typename Signature>
void
swap(
    packaged_task< Signature > & l, 
    packaged_task< Signature > & r) noexcept;

(2)

template <typename R>
void
swap(promise< R > & l, promise< R > & r) noexcept;

1. Specializes the std::swap algorithm.
2. Swap the value of two promises.

Exception Safety

Throws nothing.

---

_{Updated on 2023-01-04}