In multithreaded code, providing a stable iteration order with std::vector in C++ can be challenging. It's essential to ensure data consistency and prevent race conditions while iterating over the vector. This guide covers techniques to achieve a stable iteration order across multiple threads.
multithreading, C++, std::vector, stable iteration order, data consistency, race conditions, thread safety
#include <iostream>
#include <vector>
#include <thread>
#include <mutex>
std::vector<int> numbers = {1, 2, 3, 4, 5};
std::mutex mtx;
void processElement(int index) {
std::lock_guard<std::mutex> lock(mtx);
std::cout << "Processing element: " << numbers[index] << std::endl;
}
int main() {
std::vector<std::thread> threads;
for (size_t i = 0; i < numbers.size(); ++i) {
threads.emplace_back(processElement, i);
}
for (auto &t : threads) {
t.join();
}
return 0;
}
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