RateEstimator.h

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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_ */

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