我是C++的新手,正在尝试使用pthread创建多个线程。

typedef struct thread_args{
    int &sockfd;
    struct sockaddr_in &serv_addr;
    int size_serv_addr;
    socklen_t &clilen;
    int &newsockfd;
};

void create_server(int &sockfd, struct sockaddr_in &serv_addr, int size_serv_addr, socklen_t &clilen, int &newsockfd){
}

int main(int argc, char *argv[])
{
     int sockfd, newsockfd;
     socklen_t clilen;

     pthread_t t1;
     struct sockaddr_in serv_addr, cli_addr;
     struct thread_args *args;
     args->clilen = clilen;
     args->newsockfd = newsockfd;
     args->serv_addr = serv_addr;
     args->size_serv_addr = sizeof(serv_addr);
     args->sockfd = sockfd;


     pthread_create(&t1, NULL, create_server, &args);
     printf("hello abc");
     return 0;
}


当我运行此代码时,它会显示一条消息:

error:/bin/sh -c 'make -j 4 -e -f   error: invalid conversion from 'void* (*)(int&, sockaddr_in&, int, socklen_t&, int&) {aka void* (*)(int&, sockaddr_in&, int, unsigned int&, int&)}' to 'void* (*)(void*)' [-fpermissive]
      pthread_create(&t1, NULL, create_server, &args);


我怎样才能解决这个问题?

最佳答案

您的线程函数的签名应为:

void *(*start_routine) (void *)


但您提供:

void create_server(int &sockfd, struct sockaddr_in &serv_addr, int size_serv_addr, socklen_t &clilen, int &newsockfd)


您应该创建一个类似以下的函数:

void* myThread(void *arg);


然后args调用中的pthread_create参数将作为arg参数传递给myThread,您可以使用其字段来调用create_server

关于c++ - pthread c++从void *(*)到void *(*)(void *)的无效对话,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/39771441/

10-09 02:01