82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
/*
|
|
*******************************************************************************
|
|
* Copyright (C) 2013, International Business Machines Corporation and
|
|
* others. All Rights Reserved.
|
|
*******************************************************************************
|
|
*
|
|
* File LRUCACHE.H
|
|
*******************************************************************************
|
|
*/
|
|
|
|
#ifndef __LRU_CACHE_H__
|
|
#define __LRU_CACHE_H__
|
|
|
|
#include "unicode/uobject.h"
|
|
#include "umutex.h"
|
|
#include "sharedptr.h"
|
|
|
|
struct UHashtable;
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
/**
|
|
* LRUCache keyed by locale ID.
|
|
*/
|
|
|
|
class CacheEntry2;
|
|
|
|
class LRUCache : public UObject {
|
|
public:
|
|
template<typename T>
|
|
void get(const char *localeId, SharedPtr<T> &ptr, UErrorCode &status) {
|
|
SharedPtr<UObject> p;
|
|
_get(localeId, p, status);
|
|
if (U_FAILURE(status)) {
|
|
return;
|
|
}
|
|
ptr = p;
|
|
}
|
|
UBool contains(const char *localeId) const;
|
|
virtual ~LRUCache();
|
|
protected:
|
|
virtual UObject *create(const char *localeId, UErrorCode &status)=0;
|
|
LRUCache(int32_t maxSize, UMutex *mutex, UErrorCode &status);
|
|
private:
|
|
LRUCache();
|
|
LRUCache(const LRUCache &other);
|
|
LRUCache &operator=(const LRUCache &other);
|
|
UObject *safeCreate(const char *localeId, UErrorCode &status);
|
|
CacheEntry2 *mostRecentlyUsedMarker;
|
|
CacheEntry2 *leastRecentlyUsedMarker;
|
|
UHashtable *localeIdToEntries;
|
|
int32_t maxSize;
|
|
UMutex *mutex;
|
|
|
|
void moveToMostRecent(CacheEntry2 *cacheEntry);
|
|
UBool init(const char *localeId, CacheEntry2 *cacheEntry);
|
|
void _get(const char *localeId, SharedPtr<UObject> &ptr, UErrorCode &status);
|
|
};
|
|
|
|
typedef UObject *(*CreateFunc)(const char *localeId, UErrorCode &status);
|
|
|
|
class SimpleLRUCache : public LRUCache {
|
|
public:
|
|
SimpleLRUCache(
|
|
int32_t maxSize,
|
|
UMutex *mutex,
|
|
CreateFunc cf,
|
|
UErrorCode &status) :
|
|
LRUCache(maxSize, mutex, status), createFunc(cf) {
|
|
}
|
|
virtual ~SimpleLRUCache() {
|
|
}
|
|
protected:
|
|
virtual UObject *create(const char *localeId, UErrorCode &status);
|
|
private:
|
|
CreateFunc createFunc;
|
|
};
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif
|