109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
// @file timer.h
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/* Copyright 2010 10gen Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "time_support.h"
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namespace mongo {
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/**
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* simple scoped timer
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*/
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class Timer {
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public:
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Timer() {
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reset();
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}
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Timer( unsigned long long start ) {
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old = start;
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}
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int seconds() const {
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return (int)(micros() / 1000000);
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}
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int millis() const {
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return (long)(micros() / 1000);
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}
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unsigned long long micros() const {
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unsigned long long n = curTimeMicros64();
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return n - old;
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}
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unsigned long long micros(unsigned long long & n) const { // returns cur time in addition to timer result
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n = curTimeMicros64();
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return n - old;
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}
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unsigned long long startTime() {
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return old;
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}
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void reset() {
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old = curTimeMicros64();
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}
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private:
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unsigned long long old;
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};
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#if 1
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class DevTimer {
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public:
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class scoped {
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public:
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scoped(DevTimer& dt) { }
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~scoped() { }
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};
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DevTimer(string) { }
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~DevTimer() { }
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};
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#elif defined(_WIN32)
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class DevTimer {
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const string _name;
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public:
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unsigned long long _ticks;
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class scoped {
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DevTimer& _dt;
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unsigned long long _start;
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public:
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scoped(DevTimer& dt) : _dt(dt) {
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LARGE_INTEGER i;
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QueryPerformanceCounter(&i);
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_start = i.QuadPart;
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}
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~scoped() {
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LARGE_INTEGER i;
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QueryPerformanceCounter(&i);
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_dt._ticks += (i.QuadPart - _start);
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}
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};
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DevTimer(string name) : _name(name), _ticks(0) {
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}
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~DevTimer() {
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LARGE_INTEGER freq;
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assert( QueryPerformanceFrequency(&freq) );
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cout << "devtimer\t" << _name << '\t' << _ticks*1000.0/freq.QuadPart << "ms" << endl;
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}
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};
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#endif
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} // namespace mongo
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