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====== C - C++ Threads - join() ======

<WRAP important>
**WARNING:**  std::thread::join() blocks the calling thread.

Calling join on other threads in your __main__ application can cause the application to freeze. 

A call to **std::thread::join()** blocks until the thread on which join is called, has finished executing.

  * A join() in the main() will wait for the execution of the spawned threads to finish before it can exit the application.
  * If join() is not called after creating a thread the main function will not wait for the spawned thread to complete before it tears down the application. 
    * If the application tears down before the spawned thread finishes, it will terminate the spawned thread as well, even if it has not finished executing.
    * This can leave data in a very inconsistent state and should be avoided at all cost. 

</WRAP>

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[[C:C++ Threads:join()|join()]]