aboutsummaryrefslogtreecommitdiffstats
path: root/lib/asio/detail/reactive_null_buffers_op.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/asio/detail/reactive_null_buffers_op.hpp')
-rw-r--r--lib/asio/detail/reactive_null_buffers_op.hpp90
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/asio/detail/reactive_null_buffers_op.hpp b/lib/asio/detail/reactive_null_buffers_op.hpp
new file mode 100644
index 0000000..7408269
--- /dev/null
+++ b/lib/asio/detail/reactive_null_buffers_op.hpp
@@ -0,0 +1,90 @@
+//
+// detail/reactive_null_buffers_op.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_REACTIVE_NULL_BUFFERS_OP_HPP
+#define ASIO_DETAIL_REACTIVE_NULL_BUFFERS_OP_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include "asio/detail/fenced_block.hpp"
+#include "asio/detail/handler_alloc_helpers.hpp"
+#include "asio/detail/handler_invoke_helpers.hpp"
+#include "asio/detail/memory.hpp"
+#include "asio/detail/reactor_op.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+template <typename Handler>
+class reactive_null_buffers_op : public reactor_op
+{
+public:
+ ASIO_DEFINE_HANDLER_PTR(reactive_null_buffers_op);
+
+ reactive_null_buffers_op(Handler& handler)
+ : reactor_op(&reactive_null_buffers_op::do_perform,
+ &reactive_null_buffers_op::do_complete),
+ handler_(ASIO_MOVE_CAST(Handler)(handler))
+ {
+ handler_work<Handler>::start(handler_);
+ }
+
+ static status do_perform(reactor_op*)
+ {
+ return done;
+ }
+
+ static void do_complete(void* owner, operation* base,
+ const asio::error_code& /*ec*/,
+ std::size_t /*bytes_transferred*/)
+ {
+ // Take ownership of the handler object.
+ reactive_null_buffers_op* o(static_cast<reactive_null_buffers_op*>(base));
+ ptr p = { asio::detail::addressof(o->handler_), o, o };
+ handler_work<Handler> w(o->handler_);
+
+ ASIO_HANDLER_COMPLETION((*o));
+
+ // Make a copy of the handler so that the memory can be deallocated before
+ // the upcall is made. Even if we're not about to make an upcall, a
+ // sub-object of the handler may be the true owner of the memory associated
+ // with the handler. Consequently, a local copy of the handler is required
+ // to ensure that any owning sub-object remains valid until after we have
+ // deallocated the memory here.
+ detail::binder2<Handler, asio::error_code, std::size_t>
+ handler(o->handler_, o->ec_, o->bytes_transferred_);
+ p.h = asio::detail::addressof(handler.handler_);
+ p.reset();
+
+ // Make the upcall if required.
+ if (owner)
+ {
+ fenced_block b(fenced_block::half);
+ ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
+ w.complete(handler, handler.handler_);
+ ASIO_HANDLER_INVOCATION_END;
+ }
+ }
+
+private:
+ Handler handler_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_REACTIVE_NULL_BUFFERS_OP_HPP