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/* Icinga 2 | (c) 2023 Icinga GmbH | GPLv2+ */
#pragma once
#include "base/type.hpp"
#include "base/string.hpp"
#include <condition_variable>
#include <map>
#include <mutex>
#include <set>
#ifndef _WIN32
#include <boost/interprocess/sync/interprocess_sharable_mutex.hpp>
#include <boost/interprocess/sync/scoped_lock.hpp>
#include <boost/interprocess/sync/sharable_lock.hpp>
#endif /* _WIN32 */
namespace icinga
{
#ifdef _WIN32
class ConfigObjectsSharedLock
{
public:
inline ConfigObjectsSharedLock(std::try_to_lock_t)
{
}
constexpr explicit operator bool() const
{
return true;
}
};
#else /* _WIN32 */
/**
* Waits until all ConfigObjects*Lock-s have vanished. For its lifetime disallows such.
* Keep an instance alive during reload to forbid runtime config changes!
* This way Icinga reads a consistent config which doesn't suddenly get runtime-changed.
*
* @ingroup remote
*/
class ConfigObjectsExclusiveLock
{
public:
ConfigObjectsExclusiveLock();
private:
boost::interprocess::scoped_lock<boost::interprocess::interprocess_sharable_mutex> m_Lock;
};
/**
* Waits until the only ConfigObjectsExclusiveLock has vanished (if any). For its lifetime disallows such.
* Keep an instance alive during runtime config changes to delay a reload (if any)!
* This way Icinga reads a consistent config which doesn't suddenly get runtime-changed.
*
* @ingroup remote
*/
class ConfigObjectsSharedLock
{
public:
ConfigObjectsSharedLock(std::try_to_lock_t);
inline explicit operator bool() const
{
return m_Lock.owns();
}
private:
boost::interprocess::sharable_lock<boost::interprocess::interprocess_sharable_mutex> m_Lock;
};
#endif /* _WIN32 */
/**
* Allows you to easily lock/unlock a specific object of a given type by its name.
*
* That way, locking an object "this" of type Host does not affect an object "this" of
* type "Service" nor an object "other" of type "Host".
*
* @ingroup remote
*/
class ObjectNameLock
{
public:
ObjectNameLock(const Type::Ptr& ptype, const String& objName);
~ObjectNameLock();
private:
String m_ObjectName;
Type::Ptr m_Type;
static std::mutex m_Mutex;
static std::condition_variable m_CV;
static std::map<Type*, std::set<String>> m_LockedObjectNames;
};
}
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