title: Simple but fast IPC method for a Python and C++ application?
body: <p>I have a GNU Radio application which utilizes both Python and C++ code. I want to be able to signal the C++ code of an event. If they were in the same scope I would normally use a simple boolean, but the code is separate to the point where some form of shared memory is required. The code in question is performance-critical so an efficient method is required.</p>
  
  <p>I was initially thinking about a shared memory segment that is accessible by both Python and C++. Therefore I could set a flag in the python code and check it from C++. Since I just need a simple flag to pause the C++ code, would a semaphore suffice?</p>
  
  <p>To be clear, I need to set a flag from Python and the C++ code will simply check this flag, and if it is set enter a busy loop.</p>
  
  <p>So would trying to implement a shared memory segment between Python/C++ be a reasonable approach? How about a semaphore? On Linux, which is easier to implement?</p>
  
  <p>Thanks!</p>