C++ Atomic Library - Flag

Description

It is the lock-free boolean atomic type.

Declaration

Following is the declaration for std::atomic_flag.

class atomic_flag;

Parameters

none

Return Value

none

Exceptions

none

Example

In below example for std::atomic_flag.

#include <iostream>       
#include <typeinfo>       
#include <exception>      

class Polymorphic {virtual void member(){}};

int main () {
   try {
      Polymorphic * pb = 0;
      typeid(*pb);  
   } catch (std::exception& e) {
      std::cerr << "exception caught: " << e.what() << '\n';
   }
   return 0;
}

The sample output should be like this −

Output from thread 0
Output from thread 0
Output from thread 0
Output from thread 0
Output from thread 0
Output from thread 0
Output from thread 0
....................