C++中bash同步的替代方案

#include <iostream>
#include <thread>

void myThreadFunc(int id) {
    // 执行线程的具体逻辑
    std::cout << "Thread " << id << " is running." << std::endl;
}

int main() {
    const int numThreads = 5;
    std::thread threads[numThreads];

    // 创建并启动线程
    for (int i = 0; i < numThreads; ++i) {
        threads[i] = std::thread(myThreadFunc, i);
    }

    // 等待线程执行完成
    for (int i = 0; i < numThreads; ++i) {
        threads[i].join();
    }

    return 0;
}

#include <iostream>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/wait.h>

int main() {
    // 创建共享内存
    key_t key = ftok("/tmp", 'a');
    int shmId = shmget(key, 1024, IPC_CREAT | 0666);

    // 创建子进程
    pid_t pid = fork();

    if (pid == 0) {
        // 子进程
        char* sharedMemory = (char*) shmat(shmId, NULL, 0);
        std::cout << "Child process reads shared memory: " << sharedMemory << std::endl;
    } else if (pid > 0) {
        // 父进程
        char* sharedMemory = (char*) shmat(shmId, NULL, 0);
        std::string message = "Hello, shared memory!";
        memcpy(sharedMemory, message.c_str(), message.length());
        wait(NULL);
    } else {
        // 创建子进程失败
        std::cerr << "Failed to create child process." << std::endl;
        return 1;
    }

    // 销毁共享内存
    shmctl(shmId, IPC_RMID, NULL);

    return 0;
}