std::mutex::unlock – cppreference.com

Aus cppreference.com


`void unlock();`		(seit C++11)

Das Mutex wieder aufgehoben .

Original:

Unlocks the mutex.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Parameter

(None)

Original:

(none)

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Rückgabewert

(None)

Original:

(none)

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Ausnahmen

Beispiel

Dieses Beispiel zeigt, Schloss, try_lock und entsperren in Aktion

Original:

This example shows lock, try_lock and unlock in action

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <iostream>
#include <mutex>
	
int main()
{
    std::mutex test;
    if (test.try_lock()==true)
        std::cout << "lock acquired" << std::endl;
    else
        std::cout << "lock not acquired" << std::endl;
    test.unlock();	//now unlock the mutex
    test.lock();	//to lock it again
    if (test.try_lock())  //true can be left out
        std::cout << "lock acquired" << std::endl;
    else
        std::cout << "lock not acquired" << std::endl;
    test.lock(); //and now the finale (a block)
}

Output:

lock acquired
lock not acquired
(program hangs)

Siehe auch


	sperrt den Mutex, blockiert wenn der Mutex nicht verfügbar ist (öffentliche Elementfunktion) [edit]

	versucht den Mutex zu sperren und kehrt zurück, wenn der Mutex nicht verfügbar ist (öffentliche Elementfunktion) [edit]