Reorganize source files

include/beast/websocket/impl/close_op.ipp

@@ -0,0 +1,186 @@
+//
+// Copyright (c) 2013-2016 Vinnie Falco (vinnie dot falco at gmail 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 BEAST_WEBSOCKET_IMPL_CLOSE_OP_HPP
+#define BEAST_WEBSOCKET_IMPL_CLOSE_OP_HPP
+
+#include <beast/handler_alloc.hpp>
+#include <beast/static_streambuf.hpp>
+#include <memory>
+
+namespace beast {
+namespace websocket {
+
+// send the close message and wait for the response
+//
+template<class NextLayer>
+template<class Handler>
+class stream<NextLayer>::close_op
+{
+    using alloc_type =
+        handler_alloc<char, Handler>;
+    using fb_type =
+        detail::frame_streambuf;
+    using fmb_type =
+        typename fb_type::mutable_buffers_type;
+
+    struct data : op
+    {
+        stream<NextLayer>& ws;
+        close_reason cr;
+        Handler h;
+        fb_type fb;
+        fmb_type fmb;
+        bool cont;
+        int state = 0;
+
+        template<class DeducedHandler>
+        data(DeducedHandler&& h_, stream<NextLayer>& ws_,
+                close_reason const& cr_)
+            : ws(ws_)
+            , cr(cr_)
+            , h(std::forward<DeducedHandler>(h_))
+            , cont(boost_asio_handler_cont_helpers::
+                is_continuation(h))
+        {
+            ws.template write_close<
+                static_streambuf>(fb, cr);
+        }
+    };
+
+    std::shared_ptr<data> d_;
+
+public:
+    close_op(close_op&&) = default;
+    close_op(close_op const&) = default;
+
+    template<class DeducedHandler, class... Args>
+    close_op(DeducedHandler&& h,
+            stream<NextLayer>& ws, Args&&... args)
+        : d_(std::allocate_shared<data>(alloc_type{h},
+            std::forward<DeducedHandler>(h), ws,
+                std::forward<Args>(args)...))
+    {
+        (*this)(error_code{}, 0, false);
+    }
+
+    void operator()()
+    {
+        auto& d = *d_;
+        d.cont = false;
+        (*this)(error_code{}, 0, false);
+    }
+
+    void operator()(error_code const& ec)
+    {
+        (*this)(ec, 0);
+    }
+
+    void
+    operator()(error_code ec,
+        std::size_t bytes_transferred, bool again = true);
+
+    friend
+    auto asio_handler_allocate(
+        std::size_t size, close_op* op)
+    {
+        return boost_asio_handler_alloc_helpers::
+            allocate(size, op->d_->h);
+    }
+
+    friend
+    auto asio_handler_deallocate(
+        void* p, std::size_t size, close_op* op)
+    {
+        return boost_asio_handler_alloc_helpers::
+            deallocate(p, size, op->d_->h);
+    }
+
+    friend
+    auto asio_handler_is_continuation(close_op* op)
+    {
+        return op->d_->cont;
+    }
+
+    template <class Function>
+    friend
+    auto asio_handler_invoke(Function&& f, close_op* op)
+    {
+        return boost_asio_handler_invoke_helpers::
+            invoke(f, op->d_->h);
+    }
+};
+
+template<class NextLayer>
+template<class Handler>
+void 
+stream<NextLayer>::close_op<Handler>::operator()(
+    error_code ec, std::size_t bytes_transferred, bool again)
+{
+    auto& d = *d_;
+    d.cont = d.cont || again;
+    while(! ec && d.state != 99)
+    {
+        switch(d.state)
+        {
+        case 0:
+            if(d.ws.wr_block_)
+            {
+                // suspend
+                d.state = 1;
+                d.ws.rd_op_.template emplace<
+                    close_op>(std::move(*this));
+                return;
+            }
+            if(d.ws.error_)
+            {
+                // call handler
+                d.state = 99;
+                d.ws.get_io_service().post(
+                    bind_handler(std::move(*this),
+                        boost::asio::error::operation_aborted, 0));
+                return;
+            }
+            d.state = 2;
+            break;
+
+        // resume
+        case 1:
+            if(d.ws.error_)
+            {
+                // call handler
+                d.state = 99;
+                ec = boost::asio::error::operation_aborted;
+                break;
+            }
+            d.state = 2;
+            break;
+
+        case 2:
+            // send close
+            d.state = 99;
+            assert(! d.ws.wr_close_);
+            d.ws.wr_close_ = true;
+            assert(! d.ws.wr_block_);
+            d.ws.wr_block_ = &d;
+            boost::asio::async_write(d.ws.stream_,
+                d.fb.data(), std::move(*this));
+            return;
+        }
+    }
+    if(ec)
+        d.ws.error_ = true;
+    if(d.ws.wr_block_ == &d)
+        d.ws.wr_block_ = nullptr;
+    d.h(ec);
+    d.ws.rd_op_.maybe_invoke();
+}
+
+} // websocket
+} // beast
+
+#endif