ceph/src/boost/boost/asio/detail/winapp_thread.hpp

   1 //
   2 // detail/winapp_thread.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_WINAPP_THREAD_HPP
  12 #define BOOST_ASIO_DETAIL_WINAPP_THREAD_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/config.hpp>
  19
  20 #if defined(BOOST_ASIO_WINDOWS) && defined(BOOST_ASIO_WINDOWS_APP)
  21
  22 #include <boost/asio/detail/noncopyable.hpp>
  23 #include <boost/asio/detail/scoped_ptr.hpp>
  24 #include <boost/asio/detail/socket_types.hpp>
  25 #include <boost/asio/detail/throw_error.hpp>
  26 #include <boost/asio/error.hpp>
  27
  28 #include <boost/asio/detail/push_options.hpp>
  29
  30 namespace boost {
  31 namespace asio {
  32 namespace detail {
  33
  34 DWORD WINAPI winapp_thread_function(LPVOID arg);
  35
  36 class winapp_thread
  37   : private noncopyable
  38 {
  39 public:
  40   // Constructor.
  41   template <typename Function>
  42   winapp_thread(Function f, unsigned int = 0)
  43   {
  44     scoped_ptr<func_base> arg(new func<Function>(f));
  45     DWORD thread_id = 0;
  46     thread_ = ::CreateThread(0, 0, winapp_thread_function,
  47         arg.get(), 0, &thread_id);
  48     if (!thread_)
  49     {
  50       DWORD last_error = ::GetLastError();
  51       boost::system::error_code ec(last_error,
  52           boost::asio::error::get_system_category());
  53       boost::asio::detail::throw_error(ec, "thread");
  54     }
  55     arg.release();
  56   }
  57
  58   // Destructor.
  59   ~winapp_thread()
  60   {
  61     ::CloseHandle(thread_);
  62   }
  63
  64   // Wait for the thread to exit.
  65   void join()
  66   {
  67     ::WaitForSingleObjectEx(thread_, INFINITE, false);
  68   }
  69
  70   // Get number of CPUs.
  71   static std::size_t hardware_concurrency()
  72   {
  73     SYSTEM_INFO system_info;
  74     ::GetNativeSystemInfo(&system_info);
  75     return system_info.dwNumberOfProcessors;
  76   }
  77
  78 private:
  79   friend DWORD WINAPI winapp_thread_function(LPVOID arg);
  80
  81   class func_base
  82   {
  83   public:
  84     virtual ~func_base() {}
  85     virtual void run() = 0;
  86   };
  87
  88   template <typename Function>
  89   class func
  90     : public func_base
  91   {
  92   public:
  93     func(Function f)
  94       : f_(f)
  95     {
  96     }
  97
  98     virtual void run()
  99     {
 100       f_();
 101     }
 102
 103   private:
 104     Function f_;
 105   };
 106
 107   ::HANDLE thread_;
 108 };
 109
 110 inline DWORD WINAPI winapp_thread_function(LPVOID arg)
 111 {
 112   scoped_ptr<winapp_thread::func_base> func(
 113       static_cast<winapp_thread::func_base*>(arg));
 114   func->run();
 115   return 0;
 116 }
 117
 118 } // namespace detail
 119 } // namespace asio
 120 } // namespace boost
 121
 122 #include <boost/asio/detail/pop_options.hpp>
 123
 124 #endif // defined(BOOST_ASIO_WINDOWS) && defined(BOOST_ASIO_WINDOWS_APP)
 125
 126 #endif // BOOST_ASIO_DETAIL_WINAPP_THREAD_HPP