75 lines
1.5 KiB
C++
75 lines
1.5 KiB
C++
// Copyright 2018, 2020 Peter Dimov
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt)
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#include <boost/shared_ptr.hpp>
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#include <boost/weak_ptr.hpp>
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#include <boost/smart_ptr/detail/lightweight_thread.hpp>
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#include <boost/bind/bind.hpp>
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#include <boost/core/lightweight_test.hpp>
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static boost::shared_ptr<int> sp( new int );
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static boost::weak_ptr<int> wp( sp );
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void f1( int n )
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{
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for( int i = 0; i < n; ++i )
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{
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boost::weak_ptr<int> p1( wp );
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BOOST_TEST( !wp.expired() );
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BOOST_TEST( wp.lock() != 0 );
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}
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}
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void f2( int n )
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{
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for( int i = 0; i < n; ++i )
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{
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boost::weak_ptr<int> p1( wp );
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BOOST_TEST( wp.expired() );
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BOOST_TEST( wp.lock() == 0 );
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}
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}
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int main()
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{
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int const N = 100000; // iterations
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int const M = 8; // threads
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boost::detail::lw_thread_t th[ M ] = {};
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for( int i = 0; i < M; ++i )
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{
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boost::detail::lw_thread_create( th[ i ], boost::bind( f1, N ) );
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}
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for( int i = 0; i < M; ++i )
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{
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boost::detail::lw_thread_join( th[ i ] );
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}
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BOOST_TEST_EQ( sp.use_count(), 1 );
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BOOST_TEST_EQ( wp.use_count(), 1 );
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sp.reset();
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BOOST_TEST_EQ( sp.use_count(), 0 );
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BOOST_TEST_EQ( wp.use_count(), 0 );
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for( int i = 0; i < M; ++i )
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{
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boost::detail::lw_thread_create( th[ i ], boost::bind( f2, N ) );
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}
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for( int i = 0; i < M; ++i )
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{
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boost::detail::lw_thread_join( th[ i ] );
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}
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wp.reset();
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return boost::report_errors();
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}
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