81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
|
/*
|
||
|
|
* 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)
|
||
|
|
*/
|
||
|
|
/*!
|
||
|
|
* \file drop_on_overflow.hpp
|
||
|
|
* \author Andrey Semashev
|
||
|
|
* \date 04.01.2012
|
||
|
|
*
|
||
|
|
* The header contains implementation of \c drop_on_overflow strategy for handling
|
||
|
|
* queue overflows in bounded queues for the asynchronous sink frontend.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef BOOST_LOG_SINKS_DROP_ON_OVERFLOW_HPP_INCLUDED_
|
||
|
|
#define BOOST_LOG_SINKS_DROP_ON_OVERFLOW_HPP_INCLUDED_
|
||
|
|
|
||
|
|
#include <boost/log/detail/config.hpp>
|
||
|
|
#include <boost/log/core/record_view.hpp>
|
||
|
|
#include <boost/log/detail/header.hpp>
|
||
|
|
|
||
|
|
#ifdef BOOST_HAS_PRAGMA_ONCE
|
||
|
|
#pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace boost {
|
||
|
|
|
||
|
|
BOOST_LOG_OPEN_NAMESPACE
|
||
|
|
|
||
|
|
namespace sinks {
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* \brief Log record dropping strategy
|
||
|
|
*
|
||
|
|
* This strategy will cause log records to be discarded in case of
|
||
|
|
* queue overflow in bounded asynchronous sinks. It should not be used
|
||
|
|
* if losing log records is not acceptable.
|
||
|
|
*/
|
||
|
|
class drop_on_overflow
|
||
|
|
{
|
||
|
|
#ifndef BOOST_LOG_DOXYGEN_PASS
|
||
|
|
public:
|
||
|
|
/*!
|
||
|
|
* This method is called by the queue when overflow is detected.
|
||
|
|
*
|
||
|
|
* \retval true Attempt to enqueue the record again.
|
||
|
|
* \retval false Discard the record.
|
||
|
|
*/
|
||
|
|
template< typename LockT >
|
||
|
|
static bool on_overflow(record_view const&, LockT&)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* This method is called by the queue when there appears a free space.
|
||
|
|
*/
|
||
|
|
static void on_queue_space_available()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/*!
|
||
|
|
* This method is called by the queue to interrupt any possible waits in \c on_overflow.
|
||
|
|
*/
|
||
|
|
static void interrupt()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif // BOOST_LOG_DOXYGEN_PASS
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace sinks
|
||
|
|
|
||
|
|
BOOST_LOG_CLOSE_NAMESPACE // namespace log
|
||
|
|
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#include <boost/log/detail/footer.hpp>
|
||
|
|
|
||
|
|
#endif // BOOST_LOG_SINKS_DROP_ON_OVERFLOW_HPP_INCLUDED_
|