[thread.jthread.mem]

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void swap(jthread& x) noexcept;

Effects: Exchanges the values of *this and x.

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bool joinable() const noexcept;

Returns: get_id() != id().

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void join();

Synchronization: The completion of the thread represented by *this synchronizes with ([intro.multithread]) the corresponding successful join() return.

[Note 1:

Operations on *this are not synchronized.

— end note]

Error conditions:

(7.1)
resource_deadlock_would_occur — if deadlock is detected or get_id() == this_thread::get_id().
(7.2)
no_such_process — if the thread is not valid.
(7.3)
invalid_argument — if the thread is not joinable.

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void detach();

Effects: The thread represented by *this continues execution without the calling thread blocking.

When detach() returns, *this no longer represents the possibly continuing thread of execution.

When the thread previously represented by *this ends execution, the implementation releases any owned resources.

Error conditions:

(11.1)
no_such_process — if the thread is not valid.
(11.2)
invalid_argument — if the thread is not joinable.

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id get_id() const noexcept;

Returns: A default constructed id object if *this does not represent a thread, otherwise this_thread::get_id() for the thread of execution represented by *this.

32 Concurrency support library [thread]

32.4 Threads [thread.threads]

32.4.4 Class jthread [thread.jthread.class]

32.4.4.3 Members [thread.jthread.mem]