title: Is reading a double an atomic operation in linux?
body: <p>I'm creating a simple server which stores several variables globally. On occasion these variables will update and during this time the variables are locked from other threads. Each client who accesses the server is granted their own thread, but has no way to change these variables and are essentially readonly. My question to the internet is do I need to worry about either a) two threads reading the same variable at the same time (not changing) or b) the writing the variable process interrupting the reading process. </p>
  
  <p>I know that in most cases writing a double is not an atomic operation because it is usually more than one register, but can the reading operation be interrupted?</p>
  
  <p>Thanks</p>