greenplumn CIdGenerator 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/dxl/CIdGenerator.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 Greenplum, Inc.
/
/ @filename:
/ CIdGenerator.h
/
/ @doc:
/ Class providing methods for a ULONG counter
/
/ @owner:
/
/
/ @test:
/
/---------------------------------------------------------------------------
#ifndef GPDXL_CIdGenerator_H
#define GPDXL_CIdGenerator_H
#define GPDXL_INVALID_ID gpos::ulong_max
#include "gpos/base.h"
namespace gpdxl
{
using namespace gpos;
class CIdGenerator
{
private:
ULONG id;
public:
explicit CIdGenerator(ULONG);
ULONG next_id();
ULONG current_id() const;
};
} / namespace gpdxl
#endif / GPDXL_CIdGenerator_H
/ EOF