00001 /* 00002 * Copyright 2004-2006 Intel Corporation 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 00018 #ifndef _RATE_ESTIMATOR_H_ 00019 #define _RATE_ESTIMATOR_H_ 00020 00021 #include "../thread/Timer.h" 00022 00023 namespace oasys { 00024 00030 class RateEstimator : public Timer { 00031 public: 00032 RateEstimator(int *var, int interval, double weight = 0.125); 00033 double rate() { return rate_; } 00034 virtual void timeout(struct timeval* now); 00035 00036 protected: 00037 int* var_; 00038 double rate_; 00039 int lastval_; 00040 int interval_; 00041 timeval lastts_; 00042 double weight_; 00043 }; 00044 00045 } // namespace oasys 00046 00047 #endif /* _RATE_ESTIMATOR_H_ */