Threads SHP example

main.cpp

#include <thread>
#include <iostream>
#include <fstream>
#include <cmath>
#include <vector>
#include <map>
//
//std::map<std::string, int> stats;
//
//void count_words(std::string& filename) {
//    std::cout << "Started reading file " << filename << std::endl;
//    std::ifstream f(filename);
//    int counter = 0;
//    std::string temp;
//    while (f >> temp) {
//        counter++;
//    }
//    f.close();
//    stats[filename] = counter;
//    std::cout << "Finished reading file " << filename << std::endl;
//}
//
//
//
//
//int main() {
//    std::vector<std::string> files = {"/etc/passwd", "kek.txt"};
//    std::vector<std::thread> threads;
//    for (std::string& s: files) {
//        threads.emplace_back(std::thread(count_words,std::ref(s)));
//
//    }
//    for (std::thread& t: threads) {
//        t.join();
//    }
//    for (auto p: stats) {
//        std::cout << p.first << " has " << p.second << " words" << std::endl;
//    }
//    return 0;
//}

std::atomic<int> counter;

void inc_counter() {
    counter++;
}


int main() {
    counter = 0;
    std::vector<std::thread> threads;
    std::cout << counter << std::endl;
    for (int i = 0 ; i < 1000; i++) {
        threads.emplace_back(std::thread(inc_counter));

    }
    for (std::thread& t: threads) {
        t.join();
    }
    std::cout << counter << std::endl;
    std::cout << threads.size() << std::endl;
}