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