std::thread::native_handle

 

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std::thread

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thread::id

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thread::native_handle

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swap(std::thread) (C++11)

 

native_handle_type native_handle();		(seit C++11) (nicht immer vorhanden)

Gibt den implementierungsdefinierten zugrundeliegenden Thread-Handle zurück.

Parameter

(keine)

Rückgabewert

Implementierungsdefinierter Handle-Typ, der den Thread repräsentiert.

Exceptions

Kann implementierungsdefinierte Ausnahmen auslösen.

Beispiel

Verwendet native_handle, um die Echtzeitplanung von C++-Threads unter einem POSIX-System zu ermöglichen.

Führen Sie diesen Code aus

#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::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();
}

Ausgabe

Thread 2 is executing at priority 0
Thread 1 is executing at priority 20