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