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- /*
- * Copyright Andrey Semashev 2007 - 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)
- */
- #include <string>
- #include <iostream>
- #include <stdexcept>
- #include <boost/config.hpp>
- #include <boost/smart_ptr/shared_ptr.hpp>
- #include <boost/core/null_deleter.hpp>
- #include <boost/log/core.hpp>
- #include <boost/log/expressions.hpp>
- #include <boost/log/sinks/sync_frontend.hpp>
- #include <boost/log/sinks/text_ostream_backend.hpp>
- #include <boost/log/sources/logger.hpp>
- #include <boost/log/sources/record_ostream.hpp>
- #include <boost/log/attributes/attribute.hpp>
- #include <boost/log/attributes/attribute_value.hpp>
- #include <boost/log/attributes/attribute_value_impl.hpp>
- #include <boost/log/attributes/attribute_cast.hpp>
- // Includes for get_uptime()
- #include <boost/throw_exception.hpp>
- #if defined(BOOST_WINDOWS)
- #include <windows.h>
- #elif defined(__linux__) || defined(__linux) || defined(linux)
- #include <sys/sysinfo.h>
- #elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
- #include <time.h>
- #include <errno.h>
- #include <sys/sysctl.h>
- #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
- #include <time.h>
- #endif
- namespace logging = boost::log;
- namespace attrs = boost::log::attributes;
- namespace src = boost::log::sources;
- namespace expr = boost::log::expressions;
- namespace sinks = boost::log::sinks;
- namespace keywords = boost::log::keywords;
- //[ example_extension_system_uptime_attr_impl
- // The function returns the system uptime, in seconds
- unsigned int get_uptime();
- // Attribute implementation class
- class system_uptime_impl :
- public logging::attribute::impl
- {
- public:
- // The method generates a new attribute value
- logging::attribute_value get_value()
- {
- return attrs::make_attribute_value(get_uptime());
- }
- };
- //]
- //[ example_extension_system_uptime_attr
- // Attribute interface class
- class system_uptime :
- public logging::attribute
- {
- public:
- system_uptime() : logging::attribute(new system_uptime_impl())
- {
- }
- // Attribute casting support
- explicit system_uptime(attrs::cast_source const& source) : logging::attribute(source.as< system_uptime_impl >())
- {
- }
- };
- //]
- //[ example_extension_system_uptime_use
- void init_logging()
- {
- boost::shared_ptr< logging::core > core = logging::core::get();
- //<-
- // Initialize the sink
- typedef sinks::synchronous_sink< sinks::text_ostream_backend > sink_t;
- boost::shared_ptr< sink_t > sink(new sink_t());
- sink->locked_backend()->add_stream(boost::shared_ptr< std::ostream >(&std::clog, boost::null_deleter()));
- sink->set_formatter(expr::stream << expr::attr< unsigned int >("SystemUptime") << ": " << expr::smessage);
- core->add_sink(sink);
- //->
- // ...
- // Add the uptime attribute to the core
- core->add_global_attribute("SystemUptime", system_uptime());
- }
- //]
- unsigned int get_uptime()
- {
- #if defined(BOOST_WINDOWS)
- return GetTickCount() / 1000u;
- #elif defined(__linux__) || defined(__linux) || defined(linux)
- struct sysinfo info;
- if (sysinfo(&info) != 0)
- BOOST_THROW_EXCEPTION(std::runtime_error("Could not acquire uptime"));
- return info.uptime;
- #elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
- struct timeval boottime;
- std::size_t len = sizeof(boottime);
- int mib[2] = { CTL_KERN, KERN_BOOTTIME };
- if (sysctl(mib, 2, &boottime, &len, NULL, 0) < 0)
- BOOST_THROW_EXCEPTION(std::runtime_error("Could not acquire uptime"));
- return time(NULL) - boottime.tv_sec;
- #elif (defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)) && defined(CLOCK_UPTIME)
- struct timespec ts;
- if (clock_gettime(CLOCK_UPTIME, &ts) != 0)
- BOOST_THROW_EXCEPTION(std::runtime_error("Could not acquire uptime"));
- return ts.tv_sec;
- #else
- return 0;
- #endif
- }
- int main(int, char*[])
- {
- init_logging();
- src::logger lg;
- BOOST_LOG(lg) << "Hello, world with uptime!";
- return 0;
- }
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