64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
// Copyright 2003-2013 Christopher M. Kohlhoff
|
|
// Copyright Oliver Kowalke, Nat Goodspeed 2015.
|
|
// 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_FIBERS_ASIO_YIELD_HPP
|
|
#define BOOST_FIBERS_ASIO_YIELD_HPP
|
|
|
|
#include <boost/config.hpp>
|
|
|
|
#ifdef BOOST_HAS_ABI_HEADERS
|
|
# include BOOST_ABI_PREFIX
|
|
#endif
|
|
|
|
namespace boost {
|
|
namespace fibers {
|
|
namespace asio {
|
|
|
|
//[fibers_asio_yield_t
|
|
class yield_t {
|
|
public:
|
|
yield_t() = default;
|
|
|
|
/**
|
|
* @code
|
|
* static yield_t yield;
|
|
* boost::system::error_code myec;
|
|
* func(yield[myec]);
|
|
* @endcode
|
|
* @c yield[myec] returns an instance of @c yield_t whose @c ec_ points
|
|
* to @c myec. The expression @c yield[myec] "binds" @c myec to that
|
|
* (anonymous) @c yield_t instance, instructing @c func() to store any
|
|
* @c error_code it might produce into @c myec rather than throwing @c
|
|
* boost::system::system_error.
|
|
*/
|
|
yield_t operator[]( boost::system::error_code & ec) const {
|
|
yield_t tmp;
|
|
tmp.ec_ = & ec;
|
|
return tmp;
|
|
}
|
|
|
|
//private:
|
|
// ptr to bound error_code instance if any
|
|
boost::system::error_code * ec_{ nullptr };
|
|
};
|
|
//]
|
|
|
|
//[fibers_asio_yield
|
|
// canonical instance
|
|
thread_local yield_t yield{};
|
|
//]
|
|
|
|
}}}
|
|
|
|
#ifdef BOOST_HAS_ABI_HEADERS
|
|
# include BOOST_ABI_SUFFIX
|
|
#endif
|
|
|
|
#include "detail/yield.hpp"
|
|
|
|
#endif // BOOST_FIBERS_ASIO_YIELD_HPP
|