When a thread is done executing- how does updates to the memory handled? Is it guaranteed that all the writes would be flushed to the main memory and visible to other threads? For e.g.
std::vector<std::thread> threads;
std::vector<int> result(32);
for(int i = 0; i < 32; ++i) {
threads.emplace_back(do_something, std::ref(result[i]));
}
for(int i = 0; i < 32; ++i) threads[i].join();
std::accumulate(result.begin(), result.end(), 0; // 1)
Is the result vector guaranteed to have the correct results without any explicit synchronization and safe to be used in std::accumulate?
Thanks
