greenplumn CTimerUser 源码
greenplumn CTimerUser 代码
文件路径：/src/backend/gporca/libgpos/src/common/CTimerUser.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CTimerUser.cpp
//
// @doc:
// Implementation of wall clock timer
//---------------------------------------------------------------------------
#include "gpos/common/CTimerUser.h"
#include "gpos/base.h"
#include "gpos/common/syslibwrapper.h"
using namespace gpos;
//---------------------------------------------------------------------------
// @function:
// CTimerUser::ElapsedUS
//
// @doc:
// User time in micro-seconds since object construction
//
//---------------------------------------------------------------------------
ULONG
CTimerUser::ElapsedUS() const
{
RUSAGE rusage;
syslib::GetRusage(&rusage);
ULONG diff = (ULONG)(((rusage.ru_utime.tv_sec - m_rusage.ru_utime.tv_sec) *
GPOS_USEC_IN_SEC) +
(rusage.ru_utime.tv_usec - m_rusage.ru_utime.tv_usec));
return diff;
}
//---------------------------------------------------------------------------
// @function:
// CTimerUser::Restart
//
// @doc:
// Restart timer
//
//---------------------------------------------------------------------------
void
CTimerUser::Restart()
{
syslib::GetRusage(&m_rusage);
}
// EOF
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