title: Is memcpy process-safe?
body: <p>Ive looked online and have not been able to satisfy myself with an answer.</p>
  
  <p>Is memcpy threadsafe? (in Windows)</p>
  
  <p>What I mean is if I write to an area of memory shared between processes (using boost::shared_memory_object) using a single memcpy and then try read that area from another 
  process using a single memcpy then will one process be blocked automatically 
  while that write is happening? Where can I read about this?</p>