std::jthread::native_handle
From cppreference.com
Returns the implementation defined underlying thread handle.
Parameters
(none)
Return value
Implementation defined handle type representing the thread.
Exceptions
May throw implementation-defined exceptions.
Example
Uses native_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 0
Thread 1 is executing at priority 20