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authorMatthias P. Braendli <matthias.braendli@mpb.li>2019-10-07 04:52:50 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2019-10-07 04:52:50 +0200
commit0aa6201a490bfabc0ae021ceb9f1fb0f46727c5d (patch)
treea71d934d8151dd43e7c16555fef17fd749c5da70 /lib/asio/detail/op_queue.hpp
parent558d74bffd9f069955af52c0b308a1d6169bcff0 (diff)
parent0330221d51421caa110b8c5dcb567cc3d0620eb9 (diff)
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Merge lime output into next branch
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diff --git a/lib/asio/detail/op_queue.hpp b/lib/asio/detail/op_queue.hpp
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-//
-// detail/op_queue.hpp
-// ~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 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 ASIO_DETAIL_OP_QUEUE_HPP
-#define ASIO_DETAIL_OP_QUEUE_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/noncopyable.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-template <typename Operation>
-class op_queue;
-
-class op_queue_access
-{
-public:
- template <typename Operation>
- static Operation* next(Operation* o)
- {
- return static_cast<Operation*>(o->next_);
- }
-
- template <typename Operation1, typename Operation2>
- static void next(Operation1*& o1, Operation2* o2)
- {
- o1->next_ = o2;
- }
-
- template <typename Operation>
- static void destroy(Operation* o)
- {
- o->destroy();
- }
-
- template <typename Operation>
- static Operation*& front(op_queue<Operation>& q)
- {
- return q.front_;
- }
-
- template <typename Operation>
- static Operation*& back(op_queue<Operation>& q)
- {
- return q.back_;
- }
-};
-
-template <typename Operation>
-class op_queue
- : private noncopyable
-{
-public:
- // Constructor.
- op_queue()
- : front_(0),
- back_(0)
- {
- }
-
- // Destructor destroys all operations.
- ~op_queue()
- {
- while (Operation* op = front_)
- {
- pop();
- op_queue_access::destroy(op);
- }
- }
-
- // Get the operation at the front of the queue.
- Operation* front()
- {
- return front_;
- }
-
- // Pop an operation from the front of the queue.
- void pop()
- {
- if (front_)
- {
- Operation* tmp = front_;
- front_ = op_queue_access::next(front_);
- if (front_ == 0)
- back_ = 0;
- op_queue_access::next(tmp, static_cast<Operation*>(0));
- }
- }
-
- // Push an operation on to the back of the queue.
- void push(Operation* h)
- {
- op_queue_access::next(h, static_cast<Operation*>(0));
- if (back_)
- {
- op_queue_access::next(back_, h);
- back_ = h;
- }
- else
- {
- front_ = back_ = h;
- }
- }
-
- // Push all operations from another queue on to the back of the queue. The
- // source queue may contain operations of a derived type.
- template <typename OtherOperation>
- void push(op_queue<OtherOperation>& q)
- {
- if (Operation* other_front = op_queue_access::front(q))
- {
- if (back_)
- op_queue_access::next(back_, other_front);
- else
- front_ = other_front;
- back_ = op_queue_access::back(q);
- op_queue_access::front(q) = 0;
- op_queue_access::back(q) = 0;
- }
- }
-
- // Whether the queue is empty.
- bool empty() const
- {
- return front_ == 0;
- }
-
- // Test whether an operation is already enqueued.
- bool is_enqueued(Operation* o) const
- {
- return op_queue_access::next(o) != 0 || back_ == o;
- }
-
-private:
- friend class op_queue_access;
-
- // The front of the queue.
- Operation* front_;
-
- // The back of the queue.
- Operation* back_;
-};
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#endif // ASIO_DETAIL_OP_QUEUE_HPP