icinga2/lib/base/loader.hpp

77 lines
2.4 KiB
C++

/******************************************************************************
* Icinga 2 *
* 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 LOADER_H
#define LOADER_H
#include "base/i2-base.hpp"
#include "base/string.hpp"
#include <boost/thread/tss.hpp>
#include <boost/function.hpp>
#include <queue>
namespace icinga
{
struct DeferredInitializer
{
public:
DeferredInitializer(const boost::function<void (void)>& callback, int priority)
: m_Callback(callback), m_Priority(priority)
{ }
inline bool operator<(const DeferredInitializer& other) const
{
return m_Priority < other.m_Priority;
}
inline void operator()(void)
{
m_Callback();
}
private:
boost::function<void (void)> m_Callback;
int m_Priority;
};
/**
* Loader helper functions.
*
* @ingroup base
*/
class I2_BASE_API Loader
{
public:
static void LoadExtensionLibrary(const String& library);
static void AddDeferredInitializer(const boost::function<void(void)>& callback, int priority = 0);
static void ExecuteDeferredInitializers(void);
private:
Loader(void);
static boost::thread_specific_ptr<std::priority_queue<DeferredInitializer> >& GetDeferredInitializers(void);
};
}
#endif /* LOADER_H */