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std::unique_lock<Mutex>::swap

From cppreference.com
< cpp‎ | thread‎ | unique lock
 
 
Concurrency support library
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void swap( unique_lock& other ) noexcept;
(since C++11)

Exchanges the internal states of the lock objects.

Contents

[edit] Parameters

other - the lock to swap the state with

[edit] Return value

(none)

[edit] Example

#include <iostream>
#include <mutex>
 
int main()
{
    std::mutex mtx1;
    std::unique_lock<std::mutex> guard1(mtx1);
    std::unique_lock<std::mutex> guard2;
    guard2.swap(guard1);
 
    if (!guard1 && guard2)
        std::cout << "swapped success\n";
 
    return 0;
}

Output:

swapped success

[edit] See also

specialization of std::swap for unique_lock
(function template) [edit]