1 files changed, 0 insertions, 98 deletions
diff --git a/boost/fiber/detail/context_mpsc_queue.hpp b/boost/fiber/detail/context_mpsc_queue.hpp
deleted file mode 100644
index f7e664659c..0000000000
--- a/boost/fiber/detail/context_mpsc_queue.hpp
+++ /dev/null
@@ -1,98 +0,0 @@
-
-//          Copyright Dmitry Vyukov 2010-2011.
-//          Copyright Oliver Kowalke 2016.
-// 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)
-//
-// based on Dmitry Vyukov's intrusive MPSC queue
-// http://www.1024cores.net/home/lock-free-algorithms/queues/intrusive-mpsc-node-based-queue
-// https://groups.google.com/forum/#!topic/lock-free/aFHvZhu1G-0
-
-#ifndef BOOST_FIBERS_DETAIL_CONTEXT_MPSC_QUEUE_H
-#define BOOST_FIBERS_DETAIL_CONTEXT_MPSC_QUEUE_H
-
-#include <atomic>
-#include <memory>
-#include <type_traits>
-
-#include <boost/assert.hpp>
-#include <boost/config.hpp>
-
-#include <boost/fiber/context.hpp>
-#include <boost/fiber/detail/config.hpp>
-
-#ifdef BOOST_HAS_ABI_HEADERS
-#  include BOOST_ABI_PREFIX
-#endif
-
-namespace boost {
-namespace fibers {
-namespace detail {
-
-// a MPSC queue
-// multiple threads push ready fibers (belonging to local scheduler)
-// (thread) local scheduler pops fibers
-class context_mpsc_queue {
-private:
-    // not default constructor for context - use aligned_storage instead
-    alignas(cache_alignment) std::aligned_storage< sizeof( context), alignof( context) >::type  storage_{};
-    context                                         *   dummy_;
-    alignas(cache_alignment) std::atomic< context * >   head_;
-    alignas(cache_alignment) context                *   tail_;
-    char                                                pad_[cacheline_length];
-
-public:
-    context_mpsc_queue() :
-        dummy_{ reinterpret_cast< context * >( std::addressof( storage_) ) },
-        head_{ dummy_ },
-        tail_{ dummy_ } {
-        dummy_->remote_nxt_.store( nullptr, std::memory_order_release);
-    }
-
-    context_mpsc_queue( context_mpsc_queue const&) = delete;
-    context_mpsc_queue & operator=( context_mpsc_queue const&) = delete;
-
-    void push( context * ctx) noexcept {
-        BOOST_ASSERT( nullptr != ctx);
-        ctx->remote_nxt_.store( nullptr, std::memory_order_release);
-        context * prev = head_.exchange( ctx, std::memory_order_acq_rel);
-        prev->remote_nxt_.store( ctx, std::memory_order_release);
-    }
-
-    context * pop() noexcept {
-        context * tail = tail_;
-        context * next = tail->remote_nxt_.load( std::memory_order_acquire);
-        if ( dummy_ == tail) {
-            if ( nullptr == next) {
-                return nullptr;
-            }
-            tail_ = next;
-            tail = next;
-            next = next->remote_nxt_.load( std::memory_order_acquire);;
-        }
-        if ( nullptr != next) {
-            tail_ = next;
-            return tail;
-        }
-        context * head = head_.load( std::memory_order_acquire);
-        if ( tail != head) {
-            return nullptr;
-        }
-        push( dummy_);
-        next = tail->remote_nxt_.load( std::memory_order_acquire);
-        if ( nullptr != next) {
-            tail_= next;
-            return tail;
-        }
-        return nullptr;
-    }
-};
-
-}}}
-
-#ifdef BOOST_HAS_ABI_HEADERS
-#  include BOOST_ABI_SUFFIX
-#endif
-
-#endif // BOOST_FIBERS_DETAIL_CONTEXT_MPSC_QUEUE_H