stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork

depends/x86_64-pc-linux-gnu/include/boost/asio/impl/use_future.hpp

@@ -0,0 +1,179 @@
+//
+// impl/use_future.hpp
+// ~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// 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)
+//
+
+#ifndef BOOST_ASIO_IMPL_USE_FUTURE_HPP
+#define BOOST_ASIO_IMPL_USE_FUTURE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <future>
+#include <boost/asio/async_result.hpp>
+#include <boost/system/error_code.hpp>
+#include <boost/asio/handler_type.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/asio/detail/memory.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+  // Completion handler to adapt a promise as a completion handler.
+  template <typename T>
+  class promise_handler
+  {
+  public:
+    // Construct from use_future special value.
+    template <typename Alloc>
+    promise_handler(use_future_t<Alloc> uf)
+      : promise_(std::allocate_shared<std::promise<T> >(
+            BOOST_ASIO_REBIND_ALLOC(Alloc, char)(uf.get_allocator()),
+            std::allocator_arg,
+            BOOST_ASIO_REBIND_ALLOC(Alloc, char)(uf.get_allocator())))
+    {
+    }
+
+    void operator()(T t)
+    {
+      promise_->set_value(t);
+    }
+
+    void operator()(const boost::system::error_code& ec, T t)
+    {
+      if (ec)
+        promise_->set_exception(
+            std::make_exception_ptr(
+              boost::system::system_error(ec)));
+      else
+        promise_->set_value(t);
+    }
+
+  //private:
+    std::shared_ptr<std::promise<T> > promise_;
+  };
+
+  // Completion handler to adapt a void promise as a completion handler.
+  template <>
+  class promise_handler<void>
+  {
+  public:
+    // Construct from use_future special value. Used during rebinding.
+    template <typename Alloc>
+    promise_handler(use_future_t<Alloc> uf)
+      : promise_(std::allocate_shared<std::promise<void> >(
+            BOOST_ASIO_REBIND_ALLOC(Alloc, char)(uf.get_allocator()),
+            std::allocator_arg,
+            BOOST_ASIO_REBIND_ALLOC(Alloc, char)(uf.get_allocator())))
+    {
+    }
+
+    void operator()()
+    {
+      promise_->set_value();
+    }
+
+    void operator()(const boost::system::error_code& ec)
+    {
+      if (ec)
+        promise_->set_exception(
+            std::make_exception_ptr(
+              boost::system::system_error(ec)));
+      else
+        promise_->set_value();
+    }
+
+  //private:
+    std::shared_ptr<std::promise<void> > promise_;
+  };
+
+  // Ensure any exceptions thrown from the handler are propagated back to the
+  // caller via the future.
+  template <typename Function, typename T>
+  void asio_handler_invoke(Function f, promise_handler<T>* h)
+  {
+    std::shared_ptr<std::promise<T> > p(h->promise_);
+    try
+    {
+      f();
+    }
+    catch (...)
+    {
+      p->set_exception(std::current_exception());
+    }
+  }
+
+} // namespace detail
+
+#if !defined(GENERATING_DOCUMENTATION)
+
+// Handler traits specialisation for promise_handler.
+template <typename T>
+class async_result<detail::promise_handler<T> >
+{
+public:
+  // The initiating function will return a future.
+  typedef std::future<T> type;
+
+  // Constructor creates a new promise for the async operation, and obtains the
+  // corresponding future.
+  explicit async_result(detail::promise_handler<T>& h)
+  {
+    value_ = h.promise_->get_future();
+  }
+
+  // Obtain the future to be returned from the initiating function.
+  type get() { return std::move(value_); }
+
+private:
+  type value_;
+};
+
+// Handler type specialisation for use_future.
+template <typename Allocator, typename ReturnType>
+struct handler_type<use_future_t<Allocator>, ReturnType()>
+{
+  typedef detail::promise_handler<void> type;
+};
+
+// Handler type specialisation for use_future.
+template <typename Allocator, typename ReturnType, typename Arg1>
+struct handler_type<use_future_t<Allocator>, ReturnType(Arg1)>
+{
+  typedef detail::promise_handler<Arg1> type;
+};
+
+// Handler type specialisation for use_future.
+template <typename Allocator, typename ReturnType>
+struct handler_type<use_future_t<Allocator>,
+    ReturnType(boost::system::error_code)>
+{
+  typedef detail::promise_handler<void> type;
+};
+
+// Handler type specialisation for use_future.
+template <typename Allocator, typename ReturnType, typename Arg2>
+struct handler_type<use_future_t<Allocator>,
+    ReturnType(boost::system::error_code, Arg2)>
+{
+  typedef detail::promise_handler<Arg2> type;
+};
+
+#endif // !defined(GENERATING_DOCUMENTATION)
+
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_IMPL_USE_FUTURE_HPP