greenplumn CDXLMemoryManager 源码
greenplumn CDXLMemoryManager 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/xml/CDXLMemoryManager.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2010 Greenplum, Inc.
//
// @filename:
// CDXLMemoryManager.h
//
// @doc:
// Memory manager for parsing DXL documents used in the Xerces XML parser.
// Provides a wrapper around the GPOS CMemoryPool interface.
//---------------------------------------------------------------------------
#ifndef GPDXL_CDXLMemoryManager_H
#define GPDXL_CDXLMemoryManager_H
#include <iostream>
#include <xercesc/framework/MemoryManager.hpp>
#include <xercesc/util/XercesDefs.hpp>
#include "gpos/base.h"
namespace gpdxl
{
using namespace gpos;
XERCES_CPP_NAMESPACE_USE
//---------------------------------------------------------------------------
// @class:
// CDXLMemoryManager
//
// @doc:
// Memory manager for parsing DXL documents used in the Xerces XML parser.
// Provides a wrapper around the GPOS CMemoryPool interface.
//
//---------------------------------------------------------------------------
class CDXLMemoryManager : public MemoryManager
{
private:
// memory pool
CMemoryPool *m_mp;
public:
CDXLMemoryManager(const CDXLMemoryManager &) = delete;
// ctor
CDXLMemoryManager(CMemoryPool *mp);
// MemoryManager interface functions
// allocates memory
void *allocate(XMLSize_t // size
) override;
// deallocates memory
void deallocate(void *pv) override;
// accessor to the underlying memory pool
CMemoryPool *
Pmp()
{
return m_mp;
}
// returns the memory manager responsible for memory allocation
// during exceptions
MemoryManager *
getExceptionMemoryManager() override
{
return (MemoryManager *) this;
}
};
} // namespace gpdxl
#endif // GPDXL_CDXLMemoryManager_H
// EOF
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