30 Thread support library [thread]

Effects: Swaps the state of *this and x.

Returns: get_id() != id()

Requires: joinable() is true.

Effects: Blocks until the thread represented by *this has completed.

Synchronization: The completion of the thread represented by *this synchronizes with ([intro.multithread]) the corresponding successful join() return. [ Note: Operations on *this are not synchronized.  — end note ]

Postconditions: The thread represented by *this has completed. get_id() == id().

Throws: system_error when an exception is required ([thread.req.exception]).

Error conditions:

• (8.1)

  resource_deadlock_would_occur — if deadlock is detected or this->get_id() == std::this_thread::get_id().

• (8.2)

  no_such_process — if the thread is not valid.

• (8.3)

  invalid_argument — if the thread is not joinable.

Requires: joinable() is true.

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 When detach() returns, *this no longer represents the possibly continuing thread of execution.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 shall release any owned resources.

Postcondition: get_id() == id().

Throws: system_error when an exception is required ([thread.req.exception]).

Error conditions:

• (13.1)

  no_such_process — if the thread is not valid.

• (13.2)

  invalid_argument — if the thread is not joinable.

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.