Page Speed Optimization Libraries
1.3.25.1
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00001 /* 00002 * Copyright 2010 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00018 00019 #ifndef NET_INSTAWEB_UTIL_PUBLIC_TIMER_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_TIMER_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 00024 namespace net_instaweb { 00025 00027 class Timer { 00028 public: 00034 static const int64 kSecondMs = 1000; 00035 static const int64 kMsUs = 1000; 00036 static const int64 kSecondUs = kMsUs * kSecondMs; 00037 static const int64 kSecondNs = 1000 * kSecondUs; 00038 static const int64 kMinuteMs = 60 * kSecondMs; 00039 static const int64 kMinuteUs = 60 * kSecondUs; 00040 static const int64 kHourMs = 60 * kMinuteMs; 00041 static const int64 kDayMs = 24 * kHourMs; 00042 static const int64 kWeekMs = 7 * kDayMs; 00043 static const int64 kMonthMs = 31 * kDayMs; 00044 static const int64 kYearMs = 365 * kDayMs; 00045 00046 virtual ~Timer(); 00047 00049 virtual int64 NowMs() const; 00050 00052 virtual int64 NowUs() const = 0; 00053 00055 virtual void SleepMs(int64 ms); 00056 00058 virtual void SleepUs(int64 us) = 0; 00059 }; 00060 00061 } 00062 00063 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_TIMER_H_