mirror of
https://github.com/VCMP-SqMod/SqMod.git
synced 2024-11-14 19:57:17 +01:00
4a6bfc086c
Switched to POCO library for unified platform/library interface. Deprecated the external module API. It was creating more problems than solving. Removed most built-in libraries in favor of system libraries for easier maintenance. Cleaned and secured code with help from static analyzers.
72 lines
2.1 KiB
C++
72 lines
2.1 KiB
C++
//
|
|
// UniqueAccessExpireLRUCache.h
|
|
//
|
|
// Library: Foundation
|
|
// Package: Cache
|
|
// Module: UniqueAccessExpireLRUCache
|
|
//
|
|
// Definition of the UniqueAccessExpireLRUCache class.
|
|
//
|
|
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_UniqueAccessExpireLRUCache_INCLUDED
|
|
#define Foundation_UniqueAccessExpireLRUCache_INCLUDED
|
|
|
|
|
|
#include "Poco/AbstractCache.h"
|
|
#include "Poco/StrategyCollection.h"
|
|
#include "Poco/UniqueAccessExpireStrategy.h"
|
|
#include "Poco/LRUStrategy.h"
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
template <
|
|
class TKey,
|
|
class TValue,
|
|
class TMutex = FastMutex,
|
|
class TEventMutex = FastMutex
|
|
>
|
|
class UniqueAccessExpireLRUCache: public AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue>, TMutex, TEventMutex>
|
|
/// A UniqueAccessExpireLRUCache combines LRU caching and time based per entry expire caching.
|
|
/// One can define for each cache entry a separate timepoint
|
|
/// but also limit the size of the cache (per default: 1024).
|
|
/// Each TValue object must thus offer the following method:
|
|
///
|
|
/// const Poco::Timespan& getTimeout() const;
|
|
///
|
|
/// which returns the relative timespan for how long the entry should be valid without being accessed!
|
|
/// The absolute expire timepoint is calculated as now() + getTimeout().
|
|
/// Accessing an object will update this absolute expire timepoint.
|
|
/// You can use the Poco::AccessExpirationDecorator to add the getExpiration
|
|
/// method to values that do not have a getExpiration function.
|
|
{
|
|
public:
|
|
UniqueAccessExpireLRUCache(std::size_t cacheSize = 1024):
|
|
AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue>, TMutex, TEventMutex>(StrategyCollection<TKey, TValue>())
|
|
{
|
|
this->_strategy.pushBack(new LRUStrategy<TKey, TValue>(cacheSize));
|
|
this->_strategy.pushBack(new UniqueAccessExpireStrategy<TKey, TValue>());
|
|
}
|
|
|
|
~UniqueAccessExpireLRUCache()
|
|
{
|
|
}
|
|
|
|
private:
|
|
UniqueAccessExpireLRUCache(const UniqueAccessExpireLRUCache& aCache);
|
|
UniqueAccessExpireLRUCache& operator = (const UniqueAccessExpireLRUCache& aCache);
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_UniqueAccessExpireLRUCache_INCLUDED
|