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std::this_thread::get_id

Defined in header <thread>
std::thread::id get_id() noexcept;
(since C++11)

Returns the id of the current thread.

Parameters

(none)

Return value

id of the current thread.

Example

#include <chrono>
#include <iostream>
#include <syncstream>
#include <thread>
using namespace std::chrono_literals;

void foo()
{
    std::thread::id this_id = std::this_thread::get_id();
 
    std::osyncstream(std::cout) << "thread " << this_id << " sleeping...\n";

    std::this_thread::sleep_for(500ms);
}

int main()
{
    std::jthread t1{foo};
    std::jthread t2{foo};
}

Possible output:

thread 140113018054400 sleeping...
thread 140113009661696 sleeping...

See also

get_id
returns the id of the thread
(public member function of std::thread)
C documentation for thrd_current

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https://en.cppreference.com/cpp/thread/get_id

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