std::timed_mutex::lock
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| void lock(); |
(seit C++11) | |
Sperrt den Mutex. Wenn ein anderer Thread bereits den Mutex gesperrt hat, wird die Ausführung des Threads solange blockiert, bis der Mutex gesperrt werden kann.
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[Bearbeiten] Parameter
(None)
Original:
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[Bearbeiten] Rückgabewert
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[Bearbeiten] Ausnahmen
Wirft std::system_error, wenn Fehler auftreten, einschließlich Fehler aus dem zugrunde liegenden Betriebssystem,
lock der Erfüllung ihrer Vorgaben verhindern würde .Original:
Throws std::system_error when errors occur, including errors from the underlying operating system that would prevent
lock from meeting its specifications.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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Note
A program may deadlock if a thread that already owns a mutex calls lock on that mutex. Alternatively, if an implementation can detect the deadlock, a resource_deadlock_would_occur error condition may be observed.
[Bearbeiten] Beispiel
Dieses Beispiel zeigt, wie
lock und unlock verwendet werden, um gemeinsam genutzte Daten zu schützen .
Original:
This example shows how
lock and unlock can be used to protect shared data.
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#include <iostream> #include <chrono> #include <thread> #include <mutex> int g_num = 0; // protected by g_num_mutex std::mutex g_num_mutex; void slow_increment(int id) { for (int i = 0; i < 3; ++i) { g_num_mutex.lock(); ++g_num; std::cout << id << " => " << g_num << '\n'; g_num_mutex.unlock(); std::this_thread::sleep_for(std::chrono::seconds(1)); } } int main() { std::thread t1(slow_increment, 0); std::thread t2(slow_increment, 1); t1.join(); t2.join(); }
Possible output:
0 => 1 1 => 2 0 => 3 1 => 4 0 => 5 1 => 6
[Bearbeiten] Siehe auch
| versucht den Mutex zu sperren und kehrt zurück, wenn der Mutex nicht verfügbar ist (öffentliche Elementfunktion) | |
| versucht, den Mutex zu sperren, kehrt zurück, wenn der Mutex hat been unavailable für das angegebene Timeout-Dauer Original: tries to lock the mutex, returns if the mutex has been unavailable for the specified timeout duration The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) | |
| versucht, den Mutex verriegeln, zurückgibt, wenn der Mutex hat been unavailable bis bestimmten Zeitpunkt erreicht worden ist Original: tries to lock the mutex, returns if the mutex has been unavailable until specified time point has been reached The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) | |
| entsperrt den Mutex (öffentliche Elementfunktion) | |
