ceph/src/boost/boost/thread/futures/wait_for_all.hpp

   1 //  (C) Copyright 2008-10 Anthony Williams
   2 //  (C) Copyright 2011-2015 Vicente J. Botet Escriba
   3 //
   4 //  Distributed under the Boost Software License, Version 1.0. (See
   5 //  accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt)
   7
   8 #ifndef BOOST_THREAD_FUTURES_WAIT_FOR_ALL_HPP
   9 #define BOOST_THREAD_FUTURES_WAIT_FOR_ALL_HPP
  10
  11 #include <boost/thread/detail/config.hpp>
  12 #include <boost/thread/futures/is_future_type.hpp>
  13
  14 #include <boost/core/enable_if.hpp>
  15
  16 namespace boost
  17 {
  18   template<typename Iterator>
  19   typename boost::disable_if<is_future_type<Iterator>,void>::type wait_for_all(Iterator begin,Iterator end)
  20   {
  21       for(Iterator current=begin;current!=end;++current)
  22       {
  23           current->wait();
  24       }
  25   }
  26
  27 #ifdef BOOST_NO_CXX11_VARIADIC_TEMPLATES
  28     template<typename F1,typename F2>
  29     typename boost::enable_if<is_future_type<F1>,void>::type wait_for_all(F1& f1,F2& f2)
  30     {
  31         f1.wait();
  32         f2.wait();
  33     }
  34
  35     template<typename F1,typename F2,typename F3>
  36     void wait_for_all(F1& f1,F2& f2,F3& f3)
  37     {
  38         f1.wait();
  39         f2.wait();
  40         f3.wait();
  41     }
  42
  43     template<typename F1,typename F2,typename F3,typename F4>
  44     void wait_for_all(F1& f1,F2& f2,F3& f3,F4& f4)
  45     {
  46         f1.wait();
  47         f2.wait();
  48         f3.wait();
  49         f4.wait();
  50     }
  51
  52     template<typename F1,typename F2,typename F3,typename F4,typename F5>
  53     void wait_for_all(F1& f1,F2& f2,F3& f3,F4& f4,F5& f5)
  54     {
  55         f1.wait();
  56         f2.wait();
  57         f3.wait();
  58         f4.wait();
  59         f5.wait();
  60     }
  61 #else
  62     template<typename F1, typename... Fs>
  63     typename boost::enable_if<is_future_type<F1>,void>::type wait_for_all(F1& f1, Fs&... fs)
  64     {
  65         bool dummy[] = { (f1.wait(), true), (fs.wait(), true)... };
  66
  67         // prevent unused parameter warning
  68         (void) dummy;
  69     }
  70 #endif // !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)}
  71
  72 }
  73
  74 #endif // header