Detailed Description

template<typename... T>
class seastar::shared_promise< T >

Like promise except that its counterpart is shared_future instead of future.

When the shared_promise is made ready, every waiter is also made ready.

Like the shared_future, the types in the parameter pack T must all be copy-constructible.

#include <seastar/core/shared_future.hh>

Public Types
using	shared_future_type = shared_future< T... >

using	future_type = typename shared_future_type::future_type

using	promise_type = typename shared_future_type::promise_type

using	clock = typename shared_future_type::clock

using	time_point = typename shared_future_type::time_point

using	value_tuple_type = typename shared_future_type::value_tuple_type

Public Member Functions
	shared_promise (const shared_promise &)=delete

	shared_promise (shared_promise &&)=default

shared_promise &	operator= (shared_promise &&)=default

future_type	get_shared_future (time_point timeout=time_point::max()) const noexcept
	Gets new future associated with this promise. If the promise is not resolved before timeout the returned future will resolve with timed_out_error. This instance doesn't have to be kept alive until the returned future resolves.

future_type	get_shared_future (abort_source &as) const noexcept
	Gets new future associated with this promise. If the promise is not resolved before abort source is triggered the returned future will resolve with abort_requests_exception. This instance doesn't have to be kept alive until the returned future resolves.

void	set_value (const value_tuple_type &result) noexcept(copy_noexcept)
	Sets the shared_promise's value (as tuple; by copying), same as normal promise.

void	set_value (value_tuple_type &&result) noexcept
	Sets the shared_promise's value (as tuple; by moving), same as normal promise.

template<typename... A>
void	set_value (A &&... a) noexcept
	Sets the shared_promise's value (variadic), same as normal promise.

void	set_exception (std::exception_ptr ex) noexcept
	Marks the shared_promise as failed, same as normal promise.

template<typename Exception >
void	set_exception (Exception &&e) noexcept
	Marks the shared_promise as failed, same as normal promise.

bool	available () const noexcept
	Returns true if the underlying future is available (ready or failed)

bool	failed () const noexcept
	Returns true if the underlying future is failed.

The documentation for this class was generated from the following file:

seastar/core/shared_future.hh

Detailed Description

Public Types

Public Member Functions