/usr/include/boost/asio/detail/impl
Edit: /usr/include/boost/asio/detail/impl/strand_service.hpp (3574B)
//
// detail/impl/strand_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 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 BOOST_ASIO_DETAIL_IMPL_STRAND_SERVICE_HPP
#define BOOST_ASIO_DETAIL_IMPL_STRAND_SERVICE_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include
#include
#include
#include
#include
#include
#include
namespace boost {
namespace asio {
namespace detail {
inline strand_service::strand_impl::strand_impl()
: operation(&strand_service::do_complete),
locked_(false)
{
}
struct strand_service::on_dispatch_exit
{
io_context_impl* io_context_impl_;
strand_impl* impl_;
~on_dispatch_exit()
{
impl_->mutex_.lock();
impl_->ready_queue_.push(impl_->waiting_queue_);
bool more_handlers = impl_->locked_ = !impl_->ready_queue_.empty();
impl_->mutex_.unlock();
if (more_handlers)
io_context_impl_->post_immediate_completion(impl_, false);
}
};
template
void strand_service::dispatch(strand_service::implementation_type& impl,
Handler& handler)
{
// If we are already in the strand then the handler can run immediately.
if (call_stack::contains(impl))
{
fenced_block b(fenced_block::full);
boost_asio_handler_invoke_helpers::invoke(handler, handler);
return;
}
// Allocate and construct an operation to wrap the handler.
typedef completion_handler op;
typename op::ptr p = { boost::asio::detail::addressof(handler),
op::ptr::allocate(handler), 0 };
p.p = new (p.v) op(handler, io_context_.get_executor());
BOOST_ASIO_HANDLER_CREATION((this->context(),
*p.p, "strand", impl, 0, "dispatch"));
bool dispatch_immediately = do_dispatch(impl, p.p);
operation* o = p.p;
p.v = p.p = 0;
if (dispatch_immediately)
{
// Indicate that this strand is executing on the current thread.
call_stack::context ctx(impl);
// Ensure the next handler, if any, is scheduled on block exit.
on_dispatch_exit on_exit = { &io_context_impl_, impl };
(void)on_exit;
op::do_complete(&io_context_impl_, o, boost::system::error_code(), 0);
}
}
// Request the io_context to invoke the given handler and return immediately.
template
void strand_service::post(strand_service::implementation_type& impl,
Handler& handler)
{
bool is_continuation =
boost_asio_handler_cont_helpers::is_continuation(handler);
// Allocate and construct an operation to wrap the handler.
typedef completion_handler op;
typename op::ptr p = { boost::asio::detail::addressof(handler),
op::ptr::allocate(handler), 0 };
p.p = new (p.v) op(handler, io_context_.get_executor());
BOOST_ASIO_HANDLER_CREATION((this->context(),
*p.p, "strand", impl, 0, "post"));
do_post(impl, p.p, is_continuation);
p.v = p.p = 0;
}
} // namespace detail
} // namespace asio
} // namespace boost
#include
#endif // BOOST_ASIO_DETAIL_IMPL_STRAND_SERVICE_HPP