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      std::jthread::native_handle

      From cppreference.com
      <cpp‎ |thread‎ |jthread

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      Concurrency support library
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      native_handle_type native_handle();
      (since C++20)
      (not always present)

      Returns the implementation defined underlying thread handle.

      Contents

      [edit]Parameters

      (none)

      [edit]Return value

      Implementation defined handle type representing the thread.

      [edit]Exceptions

      May throw implementation-defined exceptions.

      [edit]Example

      Usesnative_handle to enable realtime scheduling of C++ threads on a POSIX system.

      Run this code
      #include <chrono>#include <cstring>#include <iostream>#include <mutex>#include <pthread.h>#include <thread> std::mutex iomutex;void f(int num){std::this_thread::sleep_for(std::chrono::seconds(1));     sched_param sch;int policy;     pthread_getschedparam(pthread_self(),&policy,&sch);std::lock_guard<std::mutex> lk(iomutex);std::cout<<"Thread "<< num<<" is executing at priority "<< sch.sched_priority<<'\n';} int main(){std::jthread t1(f,1), t2(f,2);     sched_param sch;int policy;     pthread_getschedparam(t1.native_handle(),&policy,&sch);    sch.sched_priority=20;if(pthread_setschedparam(t1.native_handle(), SCHED_FIFO,&sch))std::cout<<"Failed to setschedparam: "<<std::strerror(errno)<<'\n';  }

      Output:

      Thread 2 is executing at priority 0Thread 1 is executing at priority 20
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/thread/jthread/native_handle&oldid=120720"

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