Move BenchTimer to tools as Timer

bench/BenchSysTimer_posix.cpp

-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "BenchSysTimer_posix.h"
-
-//Time
-#include <time.h>
-
-static double intervalInMSec(const timespec start_clock
-                           , const timespec end_clock)
-{
-    double duration_clock;
-    if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) {
-        duration_clock = (end_clock.tv_sec - start_clock.tv_sec-1)*1000;
-        duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec)
-                           / 1000000.0;
-    } else {
-        duration_clock = (end_clock.tv_sec - start_clock.tv_sec)*1000;
-        duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0;
-    }
-    return duration_clock;
-}
-
-void BenchSysTimer::startWall() {
-    if (-1 == clock_gettime(CLOCK_MONOTONIC, &this->fWall)) {
-        timespec none = {0, 0};
-        this->fWall = none;
-    }
-}
-void BenchSysTimer::startCpu() {
-    if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &this->fCpu)) {
-        timespec none = {0, 0};
-        this->fCpu = none;
-    }
-}
-
-double BenchSysTimer::endCpu() {
-    timespec end_cpu;
-    if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) {
-        timespec none = {0, 0};
-        end_cpu = none;
-    }
-    return intervalInMSec(this->fCpu, end_cpu);
-}
-
-double BenchSysTimer::endWall() {
-    timespec end_wall;
-    if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) {
-        timespec none = {0, 0};
-        end_wall = none;
-    }
-    return intervalInMSec(this->fWall, end_wall);
-}