/usr/include/classad/classadCache.h is in libclassad-dev 8.6.8~dfsg.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* Copyright 2011 Red Hat, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You may
* obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
***************************************************************/
#ifndef __CLASSAD_CACHE_H__
#define __CLASSAD_CACHE_H__
#include "classad/exprTree.h"
#include <string>
namespace classad {
class CacheEntry
{
public:
CacheEntry();
CacheEntry(const std::string & szNameIn, const std::string & szValueIn, ExprTree * pDataIn);
virtual ~CacheEntry();
std::string szName; // string space the names.
std::string szValue; // reference back for cleanup
ExprTree * pData;
};
typedef classad_weak_ptr< CacheEntry > pCacheEntry;
typedef classad_shared_ptr< CacheEntry > pCacheData;
/**
* In order to cache elements the could not have pointers
* to their parents as they would not match. Hence the idea of
* leveraging an envelope-letter-idiom where the envelope contains
* the pointers and through indirection operates on the letter.
*/
class CachedExprEnvelope : public ExprTree
{
public:
virtual ~CachedExprEnvelope();
/// node type
virtual NodeKind GetKind (void) const { return EXPR_ENVELOPE; }
/**
* cache () - will cache a copy of the pTree and return
* an indirect envelope
*/
#ifndef WIN32
static ExprTree * cache ( std::string & pName, const std::string & szValue, ExprTree * pTree );
#else
static ExprTree * cache (const std::string & pName, const std::string & szValue, ExprTree * pTree);
#endif
/**
* will check to see if we hit or not and return the value.
*/
static CachedExprEnvelope * check_hit (std::string & szName, const std::string & szValue);
/**
* will dump the cache contents to a file.
*/
static bool _debug_dump_keys(const std::string & szFile);
static void _debug_print_stats(FILE* fp);
ExprTree * get();
/**
* Used to obtain the string
*/
void getAttributeName(std::string & szFillMe);
protected:
CachedExprEnvelope(){;};
/**
* SameAs() - determines if two elements are the same.
*/
virtual bool SameAs(const ExprTree* tree) const;
/**
* To eliminate the mass of external checks to see if the ExprTree is
* a classad.
*/
virtual bool isClassad( ClassAd ** ptr =0 );
/** Makes a deep copy of the expression tree
* @return A deep copy of the expression, or NULL on failure.
*/
virtual ExprTree *Copy( ) const;
virtual const ExprTree* self() const;
/* This version is for shared-library compatibility.
* Remove it the next time we have to bump the ClassAds SO version.
*/
virtual const ExprTree* self();
virtual void _SetParentScope( const ClassAd* );
virtual bool _Evaluate( EvalState& st, Value& v ) const;
virtual bool _Evaluate( EvalState& st, Value& v , ExprTree*& t) const;
virtual bool _Flatten( EvalState& st, Value& v, ExprTree*& t, int* i )const;
pCacheData m_pLetter; ///< Pointer to the actual element refrenced
};
}
#endif
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