icinga2/lib/base/context.hpp

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/******************************************************************************
* Icinga 2 *
2016-01-12 08:29:59 +01:00
* Copyright (C) 2012-2016 Icinga Development Team (https://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef CONTEXT_H
#define CONTEXT_H
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#include "base/i2-base.hpp"
#include "base/string.hpp"
#include <list>
namespace icinga
{
class I2_BASE_API ContextTrace
{
public:
ContextTrace(void);
void Print(std::ostream& fp) const;
size_t GetLength(void) const;
private:
std::list<String> m_Frames;
};
I2_BASE_API std::ostream& operator<<(std::ostream& stream, const ContextTrace& trace);
/**
* A context frame.
*
* @ingroup base
*/
class I2_BASE_API ContextFrame
{
public:
ContextFrame(const String& message);
~ContextFrame(void);
private:
static std::list<String>& GetFrames(void);
friend class ContextTrace;
};
/* The currentContextFrame variable has to be volatile in order to prevent
* the compiler from optimizing it away. */
#define CONTEXT(message) volatile icinga::ContextFrame currentContextFrame(message)
}
#endif /* CONTEXT_H */