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