std::stop_token

 

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Technical Specifications

 

Thread support library

Threads
thread (C++11)
jthread (C++20)
stop_token (C++20)
stop_source (C++20)
stop_callback (C++20)
hardware_destructive_interference_sizehardware_constructive_interference_size (C++17)(C++17)
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get_id (C++11) yield (C++11)	sleep_for (C++11) sleep_until (C++11)
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lock_guard (C++11) scoped_lock (C++17) unique_lock (C++11) shared_lock (C++14) defer_lock_ttry_to_lock_tadopt_lock_t (C++11)(C++11)(C++11)	lock (C++11) try_lock (C++11) defer_locktry_to_lockadopt_lock (C++11)(C++11)(C++11) once_flag (C++11) call_once (C++11)
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condition_variable (C++11)
condition_variable_any (C++11)
notify_all_at_thread_exit (C++11)
cv_status (C++11)
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counting_semaphorebinary_semaphore (C++20)(C++20)
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latch (C++20)
barrier (C++20)
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promise (C++11) future (C++11) shared_future (C++11) packaged_task (C++11) async (C++11)	launch (C++11) future_status (C++11) future_error (C++11) future_category (C++11) future_errc (C++11)

 

std::stop_token

Member functions

stop_token::stop_token

stop_token::~stop_token

stop_token::operator=

Modifiers

stop_token::swap

Observers

stop_token::stop_requested

stop_token::stop_possible

Non-member functions

swap(std::stop_token)

operator==

 

Defined in header <stop_token>
class stop_token;		(since C++20)

The stop_token class provides the means to check if a stop request has been made or can be made, for its associated std::stop_source object. It is essentially a thread-safe "view" of the associated stop-state.

The stop_token can also be passed to the constructor of std::stop_callback, such that the callback will be invoked if the stop_token's associated std::stop_source is requested to stop. And stop_token can be passed to the interruptible waiting functions of std::condition_variable_any, to interrupt the condition variable's wait if stop is requested.

Member functions

(constructor)	constructs new stop_token object (public member function)
(destructor)	destructs the stop_token object (public member function)
operator=	assigns the stop_token object (public member function)
Modifiers
swap	swaps two stop_token objects (public member function)
Observers
stop_requested	checks whether the associated stop-state has been requested to stop (public member function)
stop_possible	checks whether associated stop-state can be requested to stop (public member function)

Non-member functions

operator==	compares two std::stop_token objects (function)
swap(std::stop_token) (C++20)	specializes the std::swap algorithm (function)

Notes

A stop_token object is not generally constructed independently, but rather retrieved from a std::jthread or std::stop_source. This makes it share the same associated stop-state as the std::jthread or std::stop_source.