libs/smart_ptr/test/sp_atomic_test.cpp

   1 #include <boost/config.hpp>
   2
   3 //  sp_atomic_test.cpp
   4 //
   5 //  Copyright (c) 2008 Peter Dimov
   6 //
   7 //  Distributed under the Boost Software License, Version 1.0.
   8 //  See accompanying file LICENSE_1_0.txt or copy at
   9 //  http://www.boost.org/LICENSE_1_0.txt
  10
  11
  12 #include <boost/detail/lightweight_test.hpp>
  13 #include <boost/shared_ptr.hpp>
  14
  15 //
  16
  17 struct X
  18 {
  19 };
  20
  21 #define BOOST_TEST_SP_EQ( p, q ) BOOST_TEST( p == q && !( p < q ) && !( q < p ) )
  22
  23 int main()
  24 {
  25     boost::shared_ptr<X> px( new X );
  26
  27     {
  28         boost::shared_ptr<X> p2 = boost::atomic_load( &px );
  29         BOOST_TEST_SP_EQ( p2, px );
  30
  31         boost::shared_ptr<X> px2( new X );
  32         boost::atomic_store( &px, px2 );
  33         BOOST_TEST_SP_EQ( px, px2 );
  34
  35         p2 = boost::atomic_load( &px );
  36         BOOST_TEST_SP_EQ( p2, px );
  37         BOOST_TEST_SP_EQ( p2, px2 );
  38
  39         boost::shared_ptr<X> px3( new X );
  40         boost::shared_ptr<X> p3 = boost::atomic_exchange( &px, px3 );
  41         BOOST_TEST_SP_EQ( p3, px2 );
  42         BOOST_TEST_SP_EQ( px, px3 );
  43
  44         boost::shared_ptr<X> px4( new X );
  45         boost::shared_ptr<X> cmp;
  46
  47         bool r = boost::atomic_compare_exchange( &px, &cmp, px4 );
  48         BOOST_TEST( !r );
  49         BOOST_TEST_SP_EQ( px, px3 );
  50         BOOST_TEST_SP_EQ( cmp, px3 );
  51
  52         r = boost::atomic_compare_exchange( &px, &cmp, px4 );
  53         BOOST_TEST( r );
  54         BOOST_TEST_SP_EQ( px, px4 );
  55     }
  56
  57     //
  58
  59     px.reset();
  60
  61     {
  62         boost::shared_ptr<X> p2 = boost::atomic_load_explicit( &px, boost::memory_order_acquire );
  63         BOOST_TEST_SP_EQ( p2, px );
  64
  65         boost::shared_ptr<X> px2( new X );
  66         boost::atomic_store_explicit( &px, px2, boost::memory_order_release );
  67         BOOST_TEST_SP_EQ( px, px2 );
  68
  69         boost::shared_ptr<X> p3 = boost::atomic_exchange_explicit( &px, boost::shared_ptr<X>(), boost::memory_order_acq_rel );
  70         BOOST_TEST_SP_EQ( p3, px2 );
  71         BOOST_TEST_SP_EQ( px, p2 );
  72
  73         boost::shared_ptr<X> px4( new X );
  74         boost::shared_ptr<X> cmp( px2 );
  75
  76         bool r = boost::atomic_compare_exchange_explicit( &px, &cmp, px4, boost::memory_order_acquire, boost::memory_order_relaxed );
  77         BOOST_TEST( !r );
  78         BOOST_TEST_SP_EQ( px, p2 );
  79         BOOST_TEST_SP_EQ( cmp, p2 );
  80
  81         r = boost::atomic_compare_exchange_explicit( &px, &cmp, px4, boost::memory_order_release, boost::memory_order_acquire );
  82         BOOST_TEST( r );
  83         BOOST_TEST_SP_EQ( px, px4 );
  84     }
  85
  86     return boost::report_errors();
  87 }