如何在c++中并发读写pcap文件

#include <iostream>
#include <fstream>
#include <thread>
#include <mutex>

std::mutex mtx;

void readPcapFile(const std::string& filename) {
    std::ifstream file(filename, std::ios::binary);
    if (!file.is_open()) {
        std::cout << "Failed to open pcap file: " << filename << std::endl;
        return;
    }

    // 读取pcap文件的逻辑
    // ...

    file.close();
}

void writePcapFile(const std::string& filename) {
    std::ofstream file(filename, std::ios::binary | std::ios::app);
    if (!file.is_open()) {
        std::cout << "Failed to open pcap file: " << filename << std::endl;
        return;
    }

    // 写入pcap文件的逻辑
    // ...

    file.close();
}

int main() {
    std::string filename = "example.pcap";

    std::thread readerThread(readPcapFile, filename);
    std::thread writerThread(writePcapFile, filename);

    readerThread.join();
    writerThread.join();

    return 0;
}