std::jthread::get_id
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std::jthread
Member functions
Observers
jthread::get_id
Operations
Stop token handling
Non-member functions
std::jthread::id get_id() const noexcept;
(since C++20)
Returns a value of std::jthread::id (which is a type alias for std::thread::id ) identifying the thread associated with *this.
Contents
[edit] Parameters
(none)
[edit] Return value
A value of type std::jthread::id identifying the thread associated with *this. If there is no thread associated, default constructed std::jthread::id is returned.
[edit] Example
Run this code
#include <chrono> #include <iostream> #include <thread> void foo() { std::this_thread::sleep_for (std::chrono::seconds (1)); } int main() { std::jthread t1(foo); std::jthread::id t1_id = t1.get_id(); std::jthread t2(foo); std::jthread::id t2_id = t2.get_id(); std::cout << "t1's id: " << t1_id << '\n'; std::cout << "t2's id: " << t2_id << '\n'; t1.join(); t2.join(); std::cout << "t1's id after join: " << t1.get_id() << '\n'; std::cout << "t2's id after join: " << t2.get_id() << '\n'; }
Possible output:
t1's id: 140146221688576 t2's id: 140146213295872 t1's id after join: thread::id of a non-executing thread t2's id after join: thread::id of a non-executing thread