std::thread::native_handle
native_handle_type native_handle(); |
(since C++11) | |
Returns the implementation defined underlying thread handle.
Parameters
(none)
Return value
implementation defined handle type representing the thread.
Exceptions
(none)
Example
Uses native_handle to enable realtime scheduling of C++ threads on a POSIX system
Run this code
#include <thread> #include <mutex> #include <iostream> #include <chrono> #include <cstring> #include <pthread.h> 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::thread 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'; } t1.join(); t2.join(); }
Output:
Thread 2 is executing at priority 0 Thread 1 is executing at priority 20