title: Are functions in the C standard library thread safe?
body: <p>Where can I get a definitive answer, whether my <code>memcpy</code> (using the eglibc implementation that comes with Ubuntu) is thread safe? - Honestly, I really did not find a clear YES or NO in the docs.</p>
  
  <p>By the way, with "thread safe" I mean it is safe to use <code>memcpy</code> concurrently whenever it would be safe to copy the date byte for byte concurrently. This should be possible at least if read-only data are copied to regions that do not overlap.</p>
  
  <p>Ideally I would like to see something like the lists at the bottom of <a href="http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0475i/Chdfgjej.html">this</a> page in the ARM compiler docs.</p>