1 files changed, 71 insertions, 0 deletions
diff --git a/boost/asio/detail/null_signal_blocker.hpp b/boost/asio/detail/null_signal_blocker.hpp
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+++ b/boost/asio/detail/null_signal_blocker.hpp
@@ -0,0 +1,71 @@
+//
+// detail/null_signal_blocker.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
+#define BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if !defined(BOOST_HAS_THREADS) \
+  || defined(BOOST_ASIO_DISABLE_THREADS) \
+  || defined(BOOST_WINDOWS) \
+  || defined(__CYGWIN__) \
+  || defined(__SYMBIAN32__)
+
+#include <boost/asio/detail/noncopyable.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class null_signal_blocker
+  : private noncopyable
+{
+public:
+  // Constructor blocks all signals for the calling thread.
+  null_signal_blocker()
+  {
+  }
+
+  // Destructor restores the previous signal mask.
+  ~null_signal_blocker()
+  {
+  }
+
+  // Block all signals for the calling thread.
+  void block()
+  {
+  }
+
+  // Restore the previous signal mask.
+  void unblock()
+  {
+  }
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // !defined(BOOST_HAS_THREADS)
+       // || defined(BOOST_ASIO_DISABLE_THREADS)
+       // || defined(BOOST_WINDOWS)
+       // || defined(__CYGWIN__)
+       // || defined(__SYMBIAN32__)
+
+#endif // BOOST_ASIO_DETAIL_NULL_SIGNAL_BLOCKER_HPP