165 lines
4.5 KiB
C++
Executable File
165 lines
4.5 KiB
C++
Executable File
/*
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Copyright (c) 2003, Arvid Norberg, Daniel Wallin
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_ALERT_HPP_INCLUDED
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#define TORRENT_ALERT_HPP_INCLUDED
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#include <memory>
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#include <queue>
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#include <string>
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#include <cassert>
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#include <typeinfo>
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#ifdef _MSC_VER
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#pragma warning(push, 1)
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#endif
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#include <boost/thread/mutex.hpp>
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#include <boost/preprocessor/repetition/enum_params_with_a_default.hpp>
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#include <boost/preprocessor/repetition/enum.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/enum_shifted_params.hpp>
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#include "libtorrent/time.hpp"
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#include "libtorrent/config.hpp"
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#ifndef TORRENT_MAX_ALERT_TYPES
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#define TORRENT_MAX_ALERT_TYPES 15
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#endif
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namespace libtorrent {
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class TORRENT_EXPORT alert
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{
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public:
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enum severity_t { debug, info, warning, critical, fatal, none };
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alert(severity_t severity, const std::string& msg);
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virtual ~alert();
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// a timestamp is automatically created in the constructor
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ptime timestamp() const;
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std::string const& msg() const;
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severity_t severity() const;
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virtual std::auto_ptr<alert> clone() const = 0;
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private:
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std::string m_msg;
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severity_t m_severity;
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ptime m_timestamp;
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};
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class TORRENT_EXPORT alert_manager
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{
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public:
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alert_manager();
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~alert_manager();
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void post_alert(const alert& alert_);
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bool pending() const;
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std::auto_ptr<alert> get();
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void set_severity(alert::severity_t severity);
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bool should_post(alert::severity_t severity) const;
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private:
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std::queue<alert*> m_alerts;
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alert::severity_t m_severity;
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mutable boost::mutex m_mutex;
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};
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struct TORRENT_EXPORT unhandled_alert : std::exception
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{
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unhandled_alert() {}
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};
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namespace detail {
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struct void_;
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template<class Handler
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, BOOST_PP_ENUM_PARAMS(TORRENT_MAX_ALERT_TYPES, class T)>
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void handle_alert_dispatch(
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const std::auto_ptr<alert>& alert_, const Handler& handler
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, const std::type_info& typeid_
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, BOOST_PP_ENUM_BINARY_PARAMS(TORRENT_MAX_ALERT_TYPES, T, *p))
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{
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if (typeid_ == typeid(T0))
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handler(*static_cast<T0*>(alert_.get()));
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else
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handle_alert_dispatch(alert_, handler, typeid_
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, BOOST_PP_ENUM_SHIFTED_PARAMS(
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TORRENT_MAX_ALERT_TYPES, p), (void_*)0);
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}
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template<class Handler>
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void handle_alert_dispatch(
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const std::auto_ptr<alert>& alert_
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, const Handler& handler
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, const std::type_info& typeid_
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, BOOST_PP_ENUM_PARAMS(TORRENT_MAX_ALERT_TYPES, void_* BOOST_PP_INTERCEPT))
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{
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throw unhandled_alert();
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}
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} // namespace detail
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template<BOOST_PP_ENUM_PARAMS_WITH_A_DEFAULT(
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TORRENT_MAX_ALERT_TYPES, class T, detail::void_)>
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struct TORRENT_EXPORT handle_alert
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{
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template<class Handler>
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handle_alert(const std::auto_ptr<alert>& alert_
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, const Handler& handler)
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{
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#define ALERT_POINTER_TYPE(z, n, text) (BOOST_PP_CAT(T, n)*)0
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detail::handle_alert_dispatch(alert_, handler, typeid(*alert_)
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, BOOST_PP_ENUM(TORRENT_MAX_ALERT_TYPES, ALERT_POINTER_TYPE, _));
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#undef ALERT_POINTER_TYPE
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}
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};
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} // namespace libtorrent
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#endif // TORRENT_ALERT_HPP_INCLUDED
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