| #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; |
| } |