Commits on Sep 7, 2015

1. crypto: replace rwlocks with simple mutexes …

   It was pointed out by Zhou Ran that the Windows XP implementation of
   uv_rwlock_rdlock() and friends may unlock the inner write mutex on a
   different thread than the one that locked it, resulting in undefined
   behavior.
   
   The only place that uses rwlocks is the crypto module.  Make that use
   normal (simple) mutexes instead.
   
   OpenSSL's critical sections are generally very short, with exclusive
   access outnumbering shared access by a factor of three or more, so
   it's not as if using rwlocks gives a decisive performance advantage.
   
   PR-URL: nodejs#2723
   Reviewed-By: Fedor Indutny <fedor@indutny.com>

   

   bnoordhuis committed Sep 7, 2015
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