chromium/third_party/icu/source/common/unifiedcache.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
* Copyright (C) 2015, International Business Machines Corporation and
* others. All Rights Reserved.
******************************************************************************
*
* File UNIFIEDCACHE.H - The ICU Unified cache.
******************************************************************************
*/

#ifndef __UNIFIED_CACHE_H__
#define __UNIFIED_CACHE_H__

#include "utypeinfo.h"  // for 'typeid' to work

#include "unicode/uobject.h"
#include "unicode/locid.h"
#include "sharedobject.h"
#include "unicode/unistr.h"
#include "cstring.h"
#include "ustr_imp.h"

struct UHashtable;
struct UHashElement;

U_NAMESPACE_BEGIN

class UnifiedCache;

/**
 * A base class for all cache keys.
 */
class U_COMMON_API CacheKeyBase : public UObject { … };



/**
 * Templated version of CacheKeyBase. 
 * A key of type LocaleCacheKey<T> maps to a value of type T.
 */
template<typename T>
class CacheKey : public CacheKeyBase { … };

/**
 * Cache key based on locale.
 * A key of type LocaleCacheKey<T> maps to a value of type T.
 */
template<typename T>
class LocaleCacheKey : public CacheKey<T> { … };

/**
 * The unified cache. A singleton type.
 * Design doc here:
 * https://docs.google.com/document/d/1RwGQJs4N4tawNbf809iYDRCvXoMKqDJihxzYt1ysmd8/edit?usp=sharing
 */
class U_COMMON_API UnifiedCache : public UnifiedCacheBase { … };

U_NAMESPACE_END

#endif