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This compliant solution eliminates the race condition by joining the threads before the lock's destructor is invoked:
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#include <mutex> #include <thread> const size_t max_threads = 10; void do_work(size_t i, std::mutex *lockp) { std::lock_guard<std::mutex> guard(*lockp); // Access data protected by the lock. } void run_threads(void) { std::thread threads[max_threads]; std::mutex lock; for (size_t i = 0; i < max_threads; ++i) { threads[i] = std::thread(do_work, i, &lock); } for (size_t i = 0; i < max_threads; ++i) { threads[i].join(); } } |
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