std::jthread::swap - cppreference.com (original) (raw)

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< cpp‎ | thread‎ | jthread

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C++

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Concurrency support library

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std::jthread

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| void swap( std::jthread& other ) noexcept; | | (since C++20) | | ------------------------------------------------------------- | | ------------- |

Exchanges the underlying handles of two jthread objects.

Contents

• 1 Parameters
• 2 Return value
• 3 Example
• 4 See also

[edit] Parameters

[edit] Return value

(none)

[edit] Example

Run this code

#include #include #include   void foo() { std::this_thread::sleep_for(std::chrono::seconds(1)); }   void bar() { std::this_thread::sleep_for(std::chrono::seconds(1)); }   int main() { std::jthread t1(foo); std::jthread t2(bar);   std::cout << "thread 1 id: " << t1.get_id() << '\n' << "thread 2 id: " << t2.get_id() << '\n';   std::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: 140185268262656 thread 2 id: 140185259869952 after std::swap(t1, t2): thread 1 id: 140185259869952 thread 2 id: 140185268262656 after t1.swap(t2): thread 1 id: 140185268262656 thread 2 id: 140185259869952

[edit] See also

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