greenplumn CAutoTrace 源码
greenplumn CAutoTrace 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/error/CAutoTrace.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CAutoTrace.h
//
// @doc:
// Auto object for creating trace messages
//---------------------------------------------------------------------------
#ifndef GPOS_CAutoTrace_H
#define GPOS_CAutoTrace_H
#include "gpos/base.h"
#include "gpos/common/CStackObject.h"
#include "gpos/io/COstreamString.h"
#include "gpos/string/CWStringDynamic.h"
namespace gpos
{
//---------------------------------------------------------------------------
// @class:
// CAutoTrace
//
// @doc:
// Auto object for creating trace messages;
// creates a stream over a dynamic string and uses it to print objects;
// at destruction the string is written to the log as a trace msg;
//
//---------------------------------------------------------------------------
class CAutoTrace : public CStackObject
{
private:
// dynamic string buffer
CWStringDynamic m_wstr;
// string stream
COstreamString m_os;
public:
CAutoTrace(const CAutoTrace &) = delete;
// ctor
explicit CAutoTrace(CMemoryPool *mp);
// dtor
~CAutoTrace();
// stream accessor
IOstream &
Os()
{
return m_os;
}
}; // class CAutoTrace
} // namespace gpos
#endif // !GPOS_CAutoTrace_H
// EOF
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