greenplumn CMessageTable 源码
greenplumn CMessageTable 代码
文件路径：/src/backend/gporca/libgpos/include/gpos/error/CMessageTable.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2008 - 2010, Greenplum, Inc.
//
// @filename:
// CMessageTable.h
//
// @doc:
// Error message table;
//---------------------------------------------------------------------------
#ifndef GPOS_CMessageTable_H
#define GPOS_CMessageTable_H
#include "gpos/error/CMessage.h"
#define GPOS_MSGTAB_SIZE 4096
namespace gpos
{
//---------------------------------------------------------------------------
// @class:
// CMessageTable
//
// @doc:
// Maintains error messages for a given locale
//
//---------------------------------------------------------------------------
class CMessageTable
{
// short hand for message tables
using MessageTable = CSyncHashtable<CMessage, CException>;
// short hand for message table accessor
using MTAccessor = CSyncHashtableAccessByKey<CMessage, CException>;
// message hashtable
MessageTable m_hash_table;
public:
CMessageTable(const CMessageTable &) = delete;
// ctor
CMessageTable(CMemoryPool *mp, ULONG size, ELocale locale);
// lookup message by error/local
CMessage *LookupMessage(CException exc);
// insert message
void AddMessage(CMessage *msg);
// simple comparison
BOOL
operator==(const CMessageTable &mt) const
{
return m_locale == mt.m_locale;
}
// equality function -- needed for hashtable
static BOOL
Equals(const ELocale &locale, const ELocale &other_locale)
{
return locale == other_locale;
}
// basic hash function
static ULONG
HashValue(const ELocale &locale)
{
return (ULONG) locale;
}
// link object
SLink m_link;
// locale
ELocale m_locale;
// invalid locale
static const ELocale m_invalid_locale;
}; // class CMessageTable
} // namespace gpos
#endif // !GPOS_CMessageTable_H
// EOF
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