33 Concurrency support library [thread]

33.6 Mutual exclusion [thread.mutex]

33.6.5 Locks [thread.lock]

33.6.5.4 Class template unique_lock [thread.lock.unique]

33.6.5.4.4 Modifiers [thread.lock.unique.mod]

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void swap(unique_lock& u) noexcept;
1
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Effects: Swaps the data members of *this and u.
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mutex_type* release() noexcept;
2
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Postconditions: pm == 0 and owns == false.
3
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Returns: The previous value of pm.
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template<class Mutex> void swap(unique_lock<Mutex>& x, unique_lock<Mutex>& y) noexcept;
4
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Effects: As if by x.swap(y).