Renamed, cleaned up interlocked.hpp; added test

test/sp_interlocked_test.cpp

@@ -0,0 +1,60 @@
+//
+//  sp_interlocked_test.cpp
+//
+//  Copyright 2014 Peter Dimov
+//
+//  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
+//
+
+#include <boost/smart_ptr/detail/sp_interlocked.hpp>
+#include <boost/detail/lightweight_test.hpp>
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+int main()
+{
+    long x = 0, r;
+
+    r = BOOST_SP_INTERLOCKED_INCREMENT( &x );
+
+    BOOST_TEST( x == 1 );
+    BOOST_TEST( r == 1 );
+
+    r = BOOST_SP_INTERLOCKED_DECREMENT( &x );
+
+    BOOST_TEST( x == 0 );
+    BOOST_TEST( r == 0 );
+
+    r = BOOST_SP_INTERLOCKED_EXCHANGE( &x, 3 );
+
+    BOOST_TEST( x == 3 );
+    BOOST_TEST( r == 0 );
+
+    r = BOOST_SP_INTERLOCKED_EXCHANGE_ADD( &x, 2 );
+
+    BOOST_TEST( x == 5 );
+    BOOST_TEST( r == 3 );
+
+    r = BOOST_SP_INTERLOCKED_COMPARE_EXCHANGE( &x, 0, 3 );
+
+    BOOST_TEST( x == 5 );
+    BOOST_TEST( r == 5 );
+
+    r = BOOST_SP_INTERLOCKED_COMPARE_EXCHANGE( &x, 0, 5 );
+
+    BOOST_TEST( x == 0 );
+    BOOST_TEST( r == 5 );
+
+    return boost::report_errors();
+}
+
+#else
+
+int main()
+{
+    return 0;
+}
+
+#endif