ceph/src/boost/libs/smart_ptr/test/shared_ptr_mt_test.cpp

   1 #include <boost/config.hpp>
   2
   3 #if defined(BOOST_MSVC)
   4 #pragma warning(disable: 4786)  // identifier truncated in debug info
   5 #pragma warning(disable: 4710)  // function not inlined
   6 #pragma warning(disable: 4711)  // function selected for automatic inline expansion
   7 #pragma warning(disable: 4514)  // unreferenced inline removed
   8 #endif
   9
  10 //  shared_ptr_mt_test.cpp - tests shared_ptr with multiple threads
  11 //
  12 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
  13 //  Copyright (c) 2008 Peter Dimov
  14 //
  15 //  Distributed under the Boost Software License, Version 1.0.
  16 //  See accompanying file LICENSE_1_0.txt or copy at
  17 //  http://www.boost.org/LICENSE_1_0.txt
  18
  19 #include <boost/shared_ptr.hpp>
  20 #include <boost/bind.hpp>
  21
  22 #include <vector>
  23
  24 #include <cstdio>
  25 #include <ctime>
  26
  27 #include <boost/detail/lightweight_thread.hpp>
  28
  29 //
  30
  31 int const n = 1024 * 1024;
  32
  33 void test( boost::shared_ptr<int> const & pi )
  34 {
  35     std::vector< boost::shared_ptr<int> > v;
  36
  37     for( int i = 0; i < n; ++i )
  38     {
  39         v.push_back( pi );
  40     }
  41 }
  42
  43 int const m = 16; // threads
  44
  45 #if defined( BOOST_HAS_PTHREADS )
  46
  47 char const * thmodel = "POSIX";
  48
  49 #else
  50
  51 char const * thmodel = "Windows";
  52
  53 #endif
  54
  55 int main()
  56 {
  57     using namespace std; // printf, clock_t, clock
  58
  59     printf( "Using %s threads: %d threads, %d iterations: ", thmodel, m, n );
  60
  61     boost::shared_ptr<int> pi( new int(42) );
  62
  63     clock_t t = clock();
  64
  65     pthread_t a[ m ];
  66
  67     for( int i = 0; i < m; ++i )
  68     {
  69         boost::detail::lw_thread_create( a[ i ], boost::bind( test, pi ) );
  70     }
  71
  72     for( int j = 0; j < m; ++j )
  73     {
  74         pthread_join( a[j], 0 );
  75     }
  76
  77     t = clock() - t;
  78
  79     printf( "\n\n%.3f seconds.\n", static_cast<double>(t) / CLOCKS_PER_SEC );
  80
  81     return 0;
  82 }