std::thread::joinable

bool joinable() const noexcept;

Check if joinable Returns whether the thread object is joinable.

返回线程对象是否是joinable的。

A thread object is joinable if it represents a thread of execution.

如果是一个正在执行的线程，那么它是joinable的。

A thread object is not joinable in any of these cases:

下列任一情况都是非joinable

if it was default-constructed.
默认构造器构造的。if it has been moved from (either constructing another thread object, or assigning to it).
通过移动构造获得的。if either of its members join or detach has been called.
调用了join或者detach方法的。

例子：

#include 
   
    
#include 
    
      #include 
     
       using namespace std; void delay(double sec) { time_t start_time, cur_time; // 变量声明 time(&start_time); do { time(&cur_time); }while((cur_time - start_time) < sec ); }; void show(int n){ cout<
      
       运行结果：
       ?






        用GDB调试发现一个好神奇的东西。
       
       运行完了
       	cout<
        
         ?
之后，居然像栈析解一样，好神奇阿，现在还不知道为什么呢。。
先保留着，下次解决。
         ?
         ?
         ?
          Parameters
none
          Return value

         true if the thread is 
         joinable.


         false otherwise.
          Example
         
          
          
           
            ?

C++11 thread::joinable(5)

std::thread::joinable

Parameters

Return value

Example