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      swap(std::jthread)

      From cppreference.com
      <cpp‎ |thread‎ |jthread

      [edit template]
       
       
      Concurrency support library
      Threads
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      friendvoid swap( jthread& lhs, jthread& rhs)noexcept;
      (since C++20)

      Overloads thestd::swap algorithm forstd::jthread. Exchanges the state oflhs with that ofrhs. Effectively callslhs.swap(rhs). This function is not visible to ordinaryunqualified orqualified lookup, and can only be found byargument-dependent lookup when std::jthread is an associated class of the arguments.

      Contents

      [edit]Parameters

      lhs, rhs - jthreads whose states to swap

      [edit]Return value

      (none)

      [edit]Example

      Run this code
      #include <chrono>#include <iostream>#include <thread> void foo(){std::this_thread::sleep_for(std::chrono::seconds(1));} void bar(){std::this_thread::sleep_for(std::chrono::seconds(1));} int main(){usingstd::swap; std::jthread t1(foo);std::jthread t2(bar); std::cout<<"thread 1 id: "<< t1.get_id()<<'\n'<<"thread 2 id: "<< t2.get_id()<<'\n';     swap(t1, t2); std::cout<<"after std::swap(t1, t2):"<<'\n'<<"thread 1 id: "<< t1.get_id()<<'\n'<<"thread 2 id: "<< t2.get_id()<<'\n';     t1.swap(t2); std::cout<<"after t1.swap(t2):"<<'\n'<<"thread 1 id: "<< t1.get_id()<<'\n'<<"thread 2 id: "<< t2.get_id()<<'\n';  }

      Possible output:

      thread 1 id: 1892thread 2 id: 2584after std::swap(t1, t2):thread 1 id: 2584thread 2 id: 1892after t1.swap(t2):thread 1 id: 1892thread 2 id: 2584

      [edit]See also

      swaps two jthread objects
      (public member function)[edit]
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/thread/jthread/swap2&oldid=114323"

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