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/core/lightweight_test.hpp>
13#include <boost/shared_ptr.hpp>
14#include <boost/memory_order.hpp>
15
16//
17
18struct X
19{
20};
21
22#define BOOST_TEST_SP_EQ( p, q ) BOOST_TEST( p == q && !( p < q ) && !( q < p ) )
23
24int main()
25{
26 boost::shared_ptr<X> px( new X );
27
28 {
29 boost::shared_ptr<X> p2 = boost::atomic_load( p: &px );
30 BOOST_TEST_SP_EQ( p2, px );
31
32 boost::shared_ptr<X> px2( new X );
33 boost::atomic_store( p: &px, r: px2 );
34 BOOST_TEST_SP_EQ( px, px2 );
35
36 p2 = boost::atomic_load( p: &px );
37 BOOST_TEST_SP_EQ( p2, px );
38 BOOST_TEST_SP_EQ( p2, px2 );
39
40 boost::shared_ptr<X> px3( new X );
41 boost::shared_ptr<X> p3 = boost::atomic_exchange( p: &px, r: px3 );
42 BOOST_TEST_SP_EQ( p3, px2 );
43 BOOST_TEST_SP_EQ( px, px3 );
44
45 boost::shared_ptr<X> px4( new X );
46 boost::shared_ptr<X> cmp;
47
48 bool r = boost::atomic_compare_exchange( p: &px, v: &cmp, w: px4 );
49 BOOST_TEST( !r );
50 BOOST_TEST_SP_EQ( px, px3 );
51 BOOST_TEST_SP_EQ( cmp, px3 );
52
53 r = boost::atomic_compare_exchange( p: &px, v: &cmp, w: px4 );
54 BOOST_TEST( r );
55 BOOST_TEST_SP_EQ( px, px4 );
56 }
57
58 //
59
60 px.reset();
61
62 {
63 boost::shared_ptr<X> p2 = boost::atomic_load_explicit( p: &px, boost::memory_order_acquire );
64 BOOST_TEST_SP_EQ( p2, px );
65
66 boost::shared_ptr<X> px2( new X );
67 boost::atomic_store_explicit( p: &px, r: px2, boost::memory_order_release );
68 BOOST_TEST_SP_EQ( px, px2 );
69
70 boost::shared_ptr<X> p3 = boost::atomic_exchange_explicit( p: &px, r: boost::shared_ptr<X>(), boost::memory_order_acq_rel );
71 BOOST_TEST_SP_EQ( p3, px2 );
72 BOOST_TEST_SP_EQ( px, p2 );
73
74 boost::shared_ptr<X> px4( new X );
75 boost::shared_ptr<X> cmp( px2 );
76
77 bool r = boost::atomic_compare_exchange_explicit( p: &px, v: &cmp, w: px4, boost::memory_order_acquire, boost::memory_order_relaxed );
78 BOOST_TEST( !r );
79 BOOST_TEST_SP_EQ( px, p2 );
80 BOOST_TEST_SP_EQ( cmp, p2 );
81
82 r = boost::atomic_compare_exchange_explicit( p: &px, v: &cmp, w: px4, boost::memory_order_release, boost::memory_order_acquire );
83 BOOST_TEST( r );
84 BOOST_TEST_SP_EQ( px, px4 );
85 }
86
87 return boost::report_errors();
88}
89

source code of boost/libs/smart_ptr/test/sp_atomic_test.cpp