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std::thread::native_handle

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Thema Support-Bibliothek
Threads
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Threads
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thread(C++11)
this_thread Namespace
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this_thread namespace
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get_id(C++11)
yield(C++11)
sleep_for(C++11)
sleep_until(C++11)
Gegenseitigen Ausschluss
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Mutual exclusion
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mutex(C++11)
timed_mutex(C++11)
Generische Sperrverwaltung
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Generic lock management
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lock_guard(C++11)
unique_lock(C++11)
defer_lock_t
try_to_lock_t
adopt_lock_t
(C++11)
(C++11)
(C++11)
lock(C++11)
try_lock(C++11)
defer_lock
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(C++11)
(C++11)
(C++11)
Zustand Variablen
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Condition variables
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condition_variable(C++11)
condition_variable_any(C++11)
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Futures
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std::thread
Mitglied Klassen
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Member classes
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thread::id
Member-Funktionen
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Member functions
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thread::thread
thread::~thread
thread::operator=
Beobachter
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Observers
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thread::joinable
thread::get_id
thread::native_handle
thread::hardware_concurrency
Operations
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Operations
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thread::join
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Non-Member-Funktionen
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Non-member functions
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std::swap
 
native_handle_type native_handle();
(seit C++11)
Gibt die Umsetzung zugrunde liegenden Thread-Handle definiert .
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Returns the implementation defined underlying thread handle.
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Inhaltsverzeichnis

[Bearbeiten] Parameter

(None)
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(none)
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[Bearbeiten] Rückgabewert

Implementierung definiert Griff Typ, der den Faden .
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implementation defined handle type representing the thread.
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[Bearbeiten] Ausnahmen

(None)
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(none)
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[Bearbeiten] Beispiel

Verwendet native_handle um Echtzeit Scheduling von C + + Threads auf einem POSIX-System zu ermöglichen
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Uses native_handle to enable realtime scheduling of C++ threads on a POSIX system
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#include <thread>
#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