refhash3keysidpool.c

经典开源游戏glest的源代码

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

/*
 * $Id: RefHash3KeysIdPool.c 568078 2007-08-21 11:43:25Z amassari $
 */


// ---------------------------------------------------------------------------
//  Include
// ---------------------------------------------------------------------------
#if defined(XERCES_TMPLSINC)
#include <xercesc/util/RefHash3KeysIdPool.hpp>
#endif

#include <xercesc/util/NullPointerException.hpp>
#include <assert.h>
#include <new>

XERCES_CPP_NAMESPACE_BEGIN

// ---------------------------------------------------------------------------
//  RefHash3KeysIdPool: Constructors and Destructor
// ---------------------------------------------------------------------------
template <class TVal>
RefHash3KeysIdPool<TVal>::RefHash3KeysIdPool( const unsigned int modulus
                                            , const bool         adoptElems
                                            , const unsigned int initSize
                                            , MemoryManager* const manager) :
    fMemoryManager(manager)
    , fAdoptedElems(adoptElems)
    , fBucketList(0)
    , fHashModulus(modulus)
    , fHash(0)
    , fIdPtrs(0)
    , fIdPtrsCount(initSize)
    , fIdCounter(0)
{
    initialize(modulus);

    // create default hasher
#if defined (XML_GCC_VERSION) && (XML_GCC_VERSION < 29600)
		 fHash = new HashXMLCh();
#else
    fHash = new (fMemoryManager) HashXMLCh();
#endif

    //
    //  Allocate the initial id pointers array. We don't have to zero them
    //  out since the fIdCounter value tells us which ones are valid. The
    //  zeroth element is never used (and represents an invalid pool id.)
    //
    if (!fIdPtrsCount)
        fIdPtrsCount = 256;
    fIdPtrs = (TVal**) fMemoryManager->allocate(fIdPtrsCount * sizeof(TVal*)); //new TVal*[fIdPtrsCount];
    fIdPtrs[0] = 0;
}

template <class TVal>
RefHash3KeysIdPool<TVal>::RefHash3KeysIdPool( const unsigned int modulus
                                            , const bool         adoptElems
                                            , HashBase*          hashBase
                                            , const unsigned int initSize
                                            , MemoryManager* const manager) :
	fMemoryManager(manager)
    , fAdoptedElems(adoptElems)
    , fBucketList(0)
    , fHashModulus(modulus)
    , fHash(0)
    , fIdPtrs(0)
    , fIdPtrsCount(initSize)
    , fIdCounter(0)
{
    initialize(modulus);
    // set hasher
    fHash = hashBase;

    //
    //  Allocate the initial id pointers array. We don't have to zero them
    //  out since the fIdCounter value tells us which ones are valid. The
    //  zeroth element is never used (and represents an invalid pool id.)
    //
    if (!fIdPtrsCount)
        fIdPtrsCount = 256;
    fIdPtrs = (TVal**) fMemoryManager->allocate(fIdPtrsCount * sizeof(TVal*)); //new TVal*[fIdPtrsCount];
    fIdPtrs[0] = 0;
}

template <class TVal>
RefHash3KeysIdPool<TVal>::RefHash3KeysIdPool( const unsigned int modulus
                                            , const unsigned int initSize
                                            , MemoryManager* const manager) :
	fMemoryManager(manager)
    , fAdoptedElems(true)
    , fBucketList(0)
    , fHashModulus(modulus)
    , fHash(0)
    , fIdPtrs(0)
    , fIdPtrsCount(initSize)
    , fIdCounter(0)
{
    initialize(modulus);

    // create default hasher
#if defined (XML_GCC_VERSION) && (XML_GCC_VERSION < 29600)
		 fHash = new HashXMLCh();
#else
    fHash = new (fMemoryManager) HashXMLCh();
#endif    

    //
    //  Allocate the initial id pointers array. We don't have to zero them
    //  out since the fIdCounter value tells us which ones are valid. The
    //  zeroth element is never used (and represents an invalid pool id.)
    //
    if (!fIdPtrsCount)
        fIdPtrsCount = 256;
    fIdPtrs = (TVal**) fMemoryManager->allocate(fIdPtrsCount * sizeof(TVal*)); //new TVal*[fIdPtrsCount];
    fIdPtrs[0] = 0;
}

template <class TVal> void RefHash3KeysIdPool<TVal>::initialize(const unsigned int modulus)
{
	if (modulus == 0)
        ThrowXMLwithMemMgr(IllegalArgumentException, XMLExcepts::HshTbl_ZeroModulus, fMemoryManager);

    // Allocate the bucket list and zero them
    fBucketList = (RefHash3KeysTableBucketElem<TVal>**) fMemoryManager->allocate
    (
        fHashModulus * sizeof(RefHash3KeysTableBucketElem<TVal>*)
    ); //new RefHash3KeysTableBucketElem<TVal>*[fHashModulus];
    memset(fBucketList, 0, sizeof(fBucketList[0]) * fHashModulus);
}

template <class TVal> RefHash3KeysIdPool<TVal>::~RefHash3KeysIdPool()
{
    removeAll();

    // Then delete the bucket list & hasher & id pointers list
    fMemoryManager->deallocate(fIdPtrs); //delete [] fIdPtrs;
    fMemoryManager->deallocate(fBucketList); //delete [] fBucketList;
    delete fHash;
}


// ---------------------------------------------------------------------------
//  RefHash3KeysIdPool: Element management
// ---------------------------------------------------------------------------
template <class TVal> bool RefHash3KeysIdPool<TVal>::isEmpty() const
{
    // Just check the bucket list for non-empty elements
    for (unsigned int buckInd = 0; buckInd < fHashModulus; buckInd++)
    {
        if (fBucketList[buckInd] != 0)
            return false;
    }
    return true;
}

template <class TVal> bool RefHash3KeysIdPool<TVal>::
containsKey(const void* const key1, const int key2, const int key3) const
{
    unsigned int hashVal;
    const RefHash3KeysTableBucketElem<TVal>* findIt = findBucketElem(key1, key2, key3, hashVal);
    return (findIt != 0);
}

template <class TVal> void RefHash3KeysIdPool<TVal>::removeAll()
{
    if (fIdCounter == 0) return;

    // Clean up the buckets first
    for (unsigned int buckInd = 0; buckInd < fHashModulus; buckInd++)
    {
        // Get the bucket list head for this entry
        RefHash3KeysTableBucketElem<TVal>* curElem = fBucketList[buckInd];
        RefHash3KeysTableBucketElem<TVal>* nextElem;
        while (curElem)
        {
            // Save the next element before we hose this one
            nextElem = curElem->fNext;

            // If we adopted the data, then delete it too
            //    (Note:  the userdata hash table instance has data type of void *.
            //    This will generate compiler warnings here on some platforms, but they
            //    can be ignored since fAdoptedElements is false.
            if (fAdoptedElems)
                delete curElem->fData;

            // Then delete the current element and move forward
            // delete curElem;
            // destructor is empty...
            // curElem->~RefHash3KeysTableBucketElem();
            fMemoryManager->deallocate(curElem);
            curElem = nextElem;
        }

        // Clean out this entry
        fBucketList[buckInd] = 0;
    }

    // Reset the id counter
    fIdCounter = 0;
}


// ---------------------------------------------------------------------------
//  RefHash3KeysIdPool: Getters
// ---------------------------------------------------------------------------
template <class TVal> TVal*
RefHash3KeysIdPool<TVal>::getByKey(const void* const key1, const int key2, const int key3)
{
    unsigned int hashVal;
    RefHash3KeysTableBucketElem<TVal>* findIt = findBucketElem(key1, key2, key3, hashVal);
    if (!findIt)
        return 0;
    return findIt->fData;
}

template <class TVal> const TVal*
RefHash3KeysIdPool<TVal>::getByKey(const void* const key1, const int key2, const int key3) const
{
    unsigned int hashVal;
    const RefHash3KeysTableBucketElem<TVal>* findIt = findBucketElem(key1, key2, key3, hashVal);
    if (!findIt)
        return 0;
    return findIt->fData;
}

template <class TVal> TVal*
RefHash3KeysIdPool<TVal>::getById(const unsigned int elemId)
{
    // If its either zero or beyond our current id, its an error
    if (!elemId || (elemId > fIdCounter))
        ThrowXMLwithMemMgr(IllegalArgumentException, XMLExcepts::Pool_InvalidId, fMemoryManager);

    return fIdPtrs[elemId];
}

template <class TVal> const TVal*
RefHash3KeysIdPool<TVal>::getById(const unsigned int elemId) const
{
    // If its either zero or beyond our current id, its an error
    if (!elemId || (elemId > fIdCounter))
        ThrowXMLwithMemMgr(IllegalArgumentException, XMLExcepts::Pool_InvalidId, fMemoryManager);

    return fIdPtrs[elemId];
}

template <class TVal>
MemoryManager* RefHash3KeysIdPool<TVal>::getMemoryManager() const
{