优化C++代码以提升嵌入式系统开发中的通信功能

#include <iostream>
#include <queue>

// 定义数据包结构
struct Packet {
    int id;
    std::string data;
};

int main() {
    std::queue<Packet> packetQueue;

    // 将接收到的数据包按照顺序入队
    packetQueue.push({1, "Hello"});
    packetQueue.push({2, "World"});
    packetQueue.push({3, "!"});

    // 依次处理队列中的数据包
    while (!packetQueue.empty()) {
        Packet packet = packetQueue.front();
        packetQueue.pop();

        // 处理数据包
        std::cout << "Received packet " << packet.id << ": " << packet.data << std::endl;
    }

    return 0;
}

#include <iostream>
#include <vector>

// 定义数据包结构
struct Packet {
    int id;
    std::string data;
};

class PacketPool {
public:
    PacketPool(int size) {
        // 预分配一定数量的数据包
        for (int i = 0; i < size; i++) {
            packets.push_back({0, ""});
        }
    }

    Packet* getPacket() {
        // 遍历数据包列表，找到未使用的数据包
        for (auto& packet : packets) {
            if (!packet.used) {
                packet.used = true;
                return &packet;
            }
        }
        return nullptr;
    }

    void returnPacket(Packet* packet) {
        // 将数据包标记为未使用
        packet->used = false;
    }

private:
    std::vector<Packet> packets;
};

int main() {
    PacketPool packetPool(10);

    // 从对象池中获取数据包
    Packet* packet1 = packetPool.getPacket();
    if (packet1) {
        packet1->id = 1;
        packet1->data = "Hello";
    }

    // 从对象池中获取数据包
    Packet* packet2 = packetPool.getPacket();
    if (packet2) {
        packet2->id = 2;
        packet2->data = "World";
    }

    // 处理数据包...

    // 将数据包归还给对象池
    packetPool.returnPacket(packet1);
    packetPool.returnPacket(packet2);

    return 0;
}

#include <iostream>
#include <thread>
#include <vector>
#include <mutex>

// 定义数据包结构
struct Packet {
    int id;
    std::string data;
};

std::mutex packetMutex;
std::vector<Packet> packetQueue;

void handlePacket(Packet packet) {
    // 处理数据包
    std::cout << "Received packet " << packet.id << ": " << packet.data << std::endl;
}

void receivePacket() {
    while (true) {
        // 接收数据包
        Packet packet;
        packet.id = 1; // 假设接收到的数据包ID均为1
        packet.data = "Hello";

        std::lock_guard<std::mutex> lock(packetMutex);
        packetQueue.push_back(packet);
    }
}

void processPacket() {
    while (true) {
        std::lock_guard<std::mutex> lock(packetMutex);
        if (!packetQueue.empty()) {
            Packet packet = packetQueue.back();
            packetQueue.pop_back();

            handlePacket(packet);
        }
    }
}

int main() {
    std::thread receiverThread(receivePacket);
    std::thread processorThread(processPacket);

    // 等待线程退出
    receiverThread.join();
    processorThread.join();

    return 0;
}