86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
#include <boost/config.hpp>
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#if defined(BOOST_MSVC)
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#pragma warning(disable: 4786) // identifier truncated in debug info
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#pragma warning(disable: 4710) // function not inlined
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#pragma warning(disable: 4711) // function selected for automatic inline expansion
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#pragma warning(disable: 4514) // unreferenced inline removed
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#endif
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//
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// weak_ptr_timing_test.cpp
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//
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// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
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// Copyright 2005 Peter Dimov
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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#include <boost/shared_ptr.hpp>
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#include <boost/weak_ptr.hpp>
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#include <vector>
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#include <cstdio>
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#include <ctime>
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#include <cstdlib>
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//
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int const n = 29000;
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int const k = 2048;
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void test( std::vector< boost::shared_ptr<int> > & v )
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{
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using namespace std; // printf, rand
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std::vector< boost::weak_ptr<int> > w( v.begin(), v.end() );
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int s = 0, r = 0;
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for( int i = 0; i < n; ++i )
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{
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// randomly kill a pointer
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v[ rand() % k ].reset();
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for( int j = 0; j < k; ++j )
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{
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if( boost::shared_ptr<int> px = w[ j ].lock() )
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{
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++s;
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}
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else
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{
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++r;
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w[ j ] = v[ rand() % k ];
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}
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}
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}
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printf( "\n%d locks, %d rebinds.", s, r );
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}
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int main()
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{
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using namespace std; // printf, clock_t, clock
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std::vector< boost::shared_ptr<int> > v( k );
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for( int i = 0; i < k; ++i )
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{
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v[ i ].reset( new int( 0 ) );
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}
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clock_t t = clock();
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test( v );
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t = clock() - t;
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printf( "\n\n%.3f seconds.\n", static_cast<double>( t ) / CLOCKS_PER_SEC );
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return 0;
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}
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