From: Yedidya Feldblum <yfeldblum@fb.com>
Date: Thu, 10 Dec 2015 20:15:41 +0000 (-0800)
Subject: Use SharedMutex as the default mutex type in Synchronized
X-Git-Tag: deprecate-dynamic-initializer~191
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d8ebd43db7f2146a6a867ce4ec282d934ff32e36;p=folly.git

Use SharedMutex as the default mutex type in Synchronized

Summary:
[Folly] Use `SharedMutex` as the default mutex type in `Synchronized`.

`folly::SharedMutex` is, overall, a faster mutex than `boost::shared_mutex`. Let's upgrade.

Reviewed By: nbronson

Differential Revision: D2743132

fb-gh-sync-id: e36881495e8e1002cd481607e05e555c5da19b9a
---

diff --git a/folly/Synchronized.h b/folly/Synchronized.h
index 109cea7c..668f6740 100644
--- a/folly/Synchronized.h
+++ b/folly/Synchronized.h
@@ -28,6 +28,7 @@
 #include <mutex>
 #include <boost/thread.hpp>
 #include <folly/Preprocessor.h>
+#include <folly/SharedMutex.h>
 #include <folly/Traits.h>
 
 namespace folly {
@@ -224,7 +225,7 @@ releaseReadWrite(T& mutex) {
  * refer to the namespace detail below, which implements the
  * primitives for mutexes in std and boost.
  */
-template <class T, class Mutex = boost::shared_mutex>
+template <class T, class Mutex = SharedMutex>
 struct Synchronized {
   /**
    * Default constructor leaves both members call their own default