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

   1 // Copyright 2018, 2020 Peter Dimov
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // https://www.boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/smart_ptr/detail/spinlock.hpp>
   6 #include <boost/smart_ptr/detail/lightweight_thread.hpp>
   7 #include <boost/bind/bind.hpp>
   8 #include <boost/core/lightweight_test.hpp>
   9
  10 static int count = 0;
  11 static boost::detail::spinlock sp = BOOST_DETAIL_SPINLOCK_INIT;
  12
  13 void f( int n )
  14 {
  15     for( int i = 0; i < n; ++i )
  16     {
  17         boost::detail::spinlock::scoped_lock lock( sp );
  18         ++count;
  19     }
  20 }
  21
  22 int main()
  23 {
  24     int const N = 100000; // iterations
  25     int const M = 8;      // threads
  26
  27     boost::detail::lw_thread_t th[ M ] = {};
  28
  29     for( int i = 0; i < M; ++i )
  30     {
  31         boost::detail::lw_thread_create( th[ i ], boost::bind( f, N ) );
  32     }
  33
  34     for( int i = 0; i < M; ++i )
  35     {
  36         boost::detail::lw_thread_join( th[ i ] );
  37     }
  38
  39     BOOST_TEST_EQ( count, N * M );
  40
  41     return boost::report_errors();
  42 }