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113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2008, Distributed Systems Architecture Group, Universidad */
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/* Complutense de Madrid (dsa-research.org) */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* 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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#ifndef SCHEDULER_POLICY_H_
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#define SCHEDULER_POLICY_H_
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#include "SchedulerHost.h"
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#include "SchedulerVirtualMachine.h"
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#include <cmath>
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using namespace std;
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class SchedulerHostPolicy
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{
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public:
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SchedulerHostPolicy(
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SchedulerVirtualMachinePool * _vmpool,
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SchedulerHostPool * _hpool,
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float w=1.0):
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vmpool(_vmpool),hpool(_hpool),sw(w){};
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virtual ~SchedulerHostPolicy(){};
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const vector<float>& get(
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SchedulerVirtualMachine * vm)
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{
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priority.clear();
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policy(vm);
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if(priority.empty()!=true)
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{
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sw.max = *max_element(
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priority.begin(),
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priority.end(),
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SchedulerHostPolicy::abs_cmp);
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transform(
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priority.begin(),
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priority.end(),
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priority.begin(),
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sw);
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}
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return priority;
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};
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protected:
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vector<float> priority;
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virtual void policy(SchedulerVirtualMachine * vm) = 0;
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SchedulerVirtualMachinePool * vmpool;
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SchedulerHostPool * hpool;
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private:
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static bool abs_cmp(float fl1, float fl2)
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{
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return fabs(fl1)<fabs(fl2);
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};
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//--------------------------------------------------------------------------
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class ScaleWeight
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{
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public:
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ScaleWeight(float _weight):weight(_weight){};
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~ScaleWeight(){};
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float operator() (float pr)
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{
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if ( max == 0 )
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{
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return 0;
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}
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else
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{
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return weight * pr / max;
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}
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};
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private:
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friend class SchedulerHostPolicy;
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float weight;
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float max;
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};
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//--------------------------------------------------------------------------
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ScaleWeight sw;
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};
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/* -------------------------------------------------------------------------- */
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#endif /*SCHEDULER_POLICY_H_*/
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