Added boost header

test/external/boost/asio/detail/reactor_op_queue.hpp

@@ -0,0 +1,202 @@
+//
+// detail/reactor_op_queue.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2011 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_DETAIL_REACTOR_OP_QUEUE_HPP
+#define BOOST_ASIO_DETAIL_REACTOR_OP_QUEUE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <boost/asio/detail/hash_map.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/detail/op_queue.hpp>
+#include <boost/asio/detail/reactor_op.hpp>
+#include <boost/asio/error.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+template <typename Descriptor>
+class reactor_op_queue
+  : private noncopyable
+{
+public:
+  // Constructor.
+  reactor_op_queue()
+    : operations_()
+  {
+  }
+
+  // Add a new operation to the queue. Returns true if this is the only
+  // operation for the given descriptor, in which case the reactor's event
+  // demultiplexing function call may need to be interrupted and restarted.
+  bool enqueue_operation(Descriptor descriptor, reactor_op* op)
+  {
+    typedef typename operations_map::iterator iterator;
+    typedef typename operations_map::value_type value_type;
+    std::pair<iterator, bool> entry =
+      operations_.insert(value_type(descriptor, operations()));
+    entry.first->second.op_queue_.push(op);
+    return entry.second;
+  }
+
+  // Cancel all operations associated with the descriptor. Any operations
+  // pending for the descriptor will be notified that they have been cancelled
+  // next time perform_cancellations is called. Returns true if any operations
+  // were cancelled, in which case the reactor's event demultiplexing function
+  // may need to be interrupted and restarted.
+  bool cancel_operations(Descriptor descriptor, op_queue<operation>& ops,
+      const boost::system::error_code& ec =
+        boost::asio::error::operation_aborted)
+  {
+    typename operations_map::iterator i = operations_.find(descriptor);
+    if (i != operations_.end())
+    {
+      while (reactor_op* op = i->second.op_queue_.front())
+      {
+        op->ec_ = ec;
+        i->second.op_queue_.pop();
+        ops.push(op);
+      }
+      operations_.erase(i);
+      return true;
+    }
+
+    return false;
+  }
+
+  // Whether there are no operations in the queue.
+  bool empty() const
+  {
+    return operations_.empty();
+  }
+
+  // Determine whether there are any operations associated with the descriptor.
+  bool has_operation(Descriptor descriptor) const
+  {
+    return operations_.find(descriptor) != operations_.end();
+  }
+
+  // Perform the operations corresponding to the descriptor. Returns true if
+  // there are still unfinished operations queued for the descriptor.
+  bool perform_operations(Descriptor descriptor, op_queue<operation>& ops)
+  {
+    typename operations_map::iterator i = operations_.find(descriptor);
+    if (i != operations_.end())
+    {
+      while (reactor_op* op = i->second.op_queue_.front())
+      {
+        if (op->perform())
+        {
+          i->second.op_queue_.pop();
+          ops.push(op);
+        }
+        else
+        {
+          return true;
+        }
+      }
+      operations_.erase(i);
+    }
+    return false;
+  }
+
+  // Fill a descriptor set with the descriptors corresponding to each active
+  // operation. The op_queue is used only when descriptors fail to be added to
+  // the descriptor set.
+  template <typename Descriptor_Set>
+  void get_descriptors(Descriptor_Set& descriptors, op_queue<operation>& ops)
+  {
+    typename operations_map::iterator i = operations_.begin();
+    while (i != operations_.end())
+    {
+      Descriptor descriptor = i->first;
+      ++i;
+      if (!descriptors.set(descriptor))
+      {
+        boost::system::error_code ec(error::fd_set_failure);
+        cancel_operations(descriptor, ops, ec);
+      }
+    }
+  }
+
+  // Perform the operations corresponding to the ready file descriptors
+  // contained in the given descriptor set.
+  template <typename Descriptor_Set>
+  void perform_operations_for_descriptors(
+      const Descriptor_Set& descriptors, op_queue<operation>& ops)
+  {
+    typename operations_map::iterator i = operations_.begin();
+    while (i != operations_.end())
+    {
+      typename operations_map::iterator op_iter = i++;
+      if (descriptors.is_set(op_iter->first))
+      {
+        while (reactor_op* op = op_iter->second.op_queue_.front())
+        {
+          if (op->perform())
+          {
+            op_iter->second.op_queue_.pop();
+            ops.push(op);
+          }
+          else
+          {
+            break;
+          }
+        }
+
+        if (op_iter->second.op_queue_.empty())
+          operations_.erase(op_iter);
+      }
+    }
+  }
+
+  // Get all operations owned by the queue.
+  void get_all_operations(op_queue<operation>& ops)
+  {
+    typename operations_map::iterator i = operations_.begin();
+    while (i != operations_.end())
+    {
+      typename operations_map::iterator op_iter = i++;
+      ops.push(op_iter->second.op_queue_);
+      operations_.erase(op_iter);
+    }
+  }
+
+private:
+  struct operations
+  {
+    operations() {}
+    operations(const operations&) {}
+    void operator=(const operations&) {}
+
+    // The operations waiting on the desccriptor.
+    op_queue<reactor_op> op_queue_;
+  };
+
+  // The type for a map of operations.
+  typedef hash_map<Descriptor, operations> operations_map;
+
+  // The operations that are currently executing asynchronously.
+  operations_map operations_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_REACTOR_OP_QUEUE_HPP