zoukankan      html  css  js  c++  java
  • 起thread时,运行报错terminate called without an active exception

    I am getting a C++ error with threading:

    terminate called without an active exception
    Aborted

    How to reproduce that error:

     1 #include <iostream>
     2 #include <stdlib.h>
     3 #include <string>
     4 #include <thread>
     5 using namespace std;
     6 void task1(std::string msg){
     7   cout << "task1 says: " << msg;
     8 }
     9 int main() { 
    10   std::thread t1(task1, "hello"); 
    11   return 0;
    12 }

    Compile and run:

    el@defiant ~/foo4/39_threading $ g++ -o s s.cpp -pthread -std=c++11
    el@defiant ~/foo4/39_threading $ ./s
    terminate called without an active exception
    Aborted (core dumped)

    You get that error because you didn't join or detach your thread.

    One way to fix it, join the thread like this:

    #include <iostream>
    #include <stdlib.h>
    #include <string>
    #include <thread>
    using namespace std;
    void task1(std::string msg){
      cout << "task1 says: " << msg;
    }
    int main() { 
      std::thread t1(task1, "hello"); 
      t1.join();
      return 0;
    }

    Then compile and run:

    el@defiant ~/foo4/39_threading $ g++ -o s s.cpp -pthread -std=c++11
    el@defiant ~/foo4/39_threading $ ./s
    task1 says: hello

    The other way to fix it, detach it like this:

    #include <iostream>
    #include <stdlib.h>
    #include <string>
    #include <unistd.h>
    #include <thread>
    using namespace std;
    void task1(std::string msg){
      cout << "task1 says: " << msg;
    }
    int main() 
    { 
         {
    
            std::thread t1(task1, "hello"); 
            t1.detach();
    
         } //thread handle is destroyed here, as goes out of scope!
    
         usleep(1000000); //wait so that hello can be printed.
    }

    Compile and run:

    el@defiant ~/foo4/39_threading $ g++ -o s s.cpp -pthread -std=c++11
    el@defiant ~/foo4/39_threading $ ./s
    task1 says: hello

    Read up on detaching C++ threads and joining C++ threads.

    总之,就是线程还在运行,主进程就退出导致了该错误。

    原文链接:https://stackoverflow.com/questions/7381757/c-terminate-called-without-an-active-exception

  • 相关阅读:
    django之form表单验证
    django之分页器
    django之Ajax
    django之模型层
    django之模板语法
    django之视图函数
    mysql 数据类型
    mysql 命令行查看数据库、创建数据库、选择数据库、删除数据库
    java里的日期时间
    Arrays类
  • 原文地址:https://www.cnblogs.com/ranson7zop/p/8028799.html
Copyright © 2011-2022 走看看