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Subject: [Boost-users] [boost] [thread] thread handling question
From: Markus Pieper (onkelhotte_at_[hidden])
Date: 2016-06-02 04:07:53

Hi, this may be a very dumb question… My boost version is 1.56.0.

In my program I use a database logging technique. To avoid blocking the
main thread, I coded this:

int main()
  while(bDoCalculations == true)
      // calculate some stuff

void CLoggingData::doLogging() {
   std::vector<float>* Result;
   // fill Result boost::thread (&CLoggingData::doStoreData, this, Result);

void CLoggingData::doStoreData(std::vector<float>* dataVector) {
   // pass pointer to database writer instance
   delete dataVector;

I do not use join() in the doLogging method because I don’t want the main
thread to block if the database is busy and will not respond immediately.

But then, after a long run I get a boost::thread_resource_error exception.
You may say: Of course, you never join your thread and after a few
thousands new threads you blow your stack.

Well, but what can I do to get my desired behavior? In the documentation I
found this which I think of might help:

You can use a thread_joiner to ensure that the thread has been joined at
the thread destructor.

int main()
  boost::thread t(my_func);
   boost::thread_joiner g(t);
  // do someting else
} // here the thread_joiner destructor will join the thread before it is

But where is the thread_joiner class implemented? Or do I have to add
something inside my doStoreData method to end the thread properly?

Thanks in advance,

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