00001 /* 00002 * Copyright 2018 The urg_stamped Authors 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 00017 #ifndef SCIP2_WALLTIME_H 00018 #define SCIP2_WALLTIME_H 00019 00020 #include <string> 00021 00022 namespace scip2 00023 { 00024 template <int DEVICE_TIMESTAMP_BITS> 00025 class Walltime 00026 { 00027 protected: 00028 bool initialized_; 00029 uint32_t time_device_prev_; 00030 uint64_t walltime_device_base_; 00031 00032 public: 00033 uint64_t update(const uint32_t &time_device) 00034 { 00035 if (!initialized_) 00036 { 00037 time_device_prev_ = time_device; 00038 initialized_ = true; 00039 } 00040 00041 if (time_device < (1 << DEVICE_TIMESTAMP_BITS) / 2 && 00042 (1 << DEVICE_TIMESTAMP_BITS) / 2 < time_device_prev_) 00043 walltime_device_base_ += 1 << DEVICE_TIMESTAMP_BITS; 00044 time_device_prev_ = time_device; 00045 00046 return walltime_device_base_ + time_device; 00047 } 00048 Walltime() 00049 : initialized_(false) 00050 , time_device_prev_(0) 00051 , walltime_device_base_(0) 00052 { 00053 } 00054 }; 00055 } // namespace scip2 00056 00057 #endif // SCIP2_WALLTIME_H