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+//
+// detail/bulk_executor_op.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 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_BULK_EXECUTOR_OP_HPP
+#define ASIO_DETAIL_BULK_EXECUTOR_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/bind_handler.hpp"
+#include "asio/detail/fenced_block.hpp"
+#include "asio/detail/handler_alloc_helpers.hpp"
+#include "asio/detail/handler_invoke_helpers.hpp"
+#include "asio/detail/scheduler_operation.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+template <typename Handler, typename Alloc,
+ typename Operation = scheduler_operation>
+class bulk_executor_op : public Operation
+{
+public:
+ ASIO_DEFINE_HANDLER_ALLOCATOR_PTR(bulk_executor_op);
+
+ template <typename H>
+ bulk_executor_op(ASIO_MOVE_ARG(H) h,
+ const Alloc& allocator, std::size_t i)
+ : Operation(&bulk_executor_op::do_complete),
+ handler_(ASIO_MOVE_CAST(H)(h)),
+ allocator_(allocator),
+ index_(i)
+ {
+ }
+
+ static void do_complete(void* owner, Operation* base,
+ const asio::error_code& /*ec*/,
+ std::size_t /*bytes_transferred*/)
+ {
+ // Take ownership of the handler object.
+ bulk_executor_op* o(static_cast<bulk_executor_op*>(base));
+ Alloc allocator(o->allocator_);
+ ptr p = { detail::addressof(allocator), o, o };
+
+ 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::binder1<Handler, std::size_t> handler(o->handler_, o->index_);
+ p.reset();
+
+ // Make the upcall if required.
+ if (owner)
+ {
+ fenced_block b(fenced_block::half);
+ ASIO_HANDLER_INVOCATION_BEGIN(());
+ asio_handler_invoke_helpers::invoke(handler, handler.handler_);
+ ASIO_HANDLER_INVOCATION_END;
+ }
+ }
+
+private:
+ Handler handler_;
+ Alloc allocator_;
+ std::size_t index_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_BULK_EXECUTOR_OP_HPP