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one/include/SchedulerPolicy.h
Javier Fontán Muiños fdfe10407e Changed copyright notice
2010-02-22 18:00:30 +01:00

112 lines
3.2 KiB
C++

/* -------------------------------------------------------------------------- */
/* Copyright 2002-2010, OpenNebula Project Leads (OpenNebula.org) */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef SCHEDULER_POLICY_H_
#define SCHEDULER_POLICY_H_
#include "SchedulerHost.h"
#include "SchedulerVirtualMachine.h"
#include <cmath>
using namespace std;
class SchedulerHostPolicy
{
public:
SchedulerHostPolicy(
SchedulerVirtualMachinePool * _vmpool,
SchedulerHostPool * _hpool,
float w=1.0):
vmpool(_vmpool),hpool(_hpool),sw(w){};
virtual ~SchedulerHostPolicy(){};
const vector<float>& get(
SchedulerVirtualMachine * vm)
{
priority.clear();
policy(vm);
if(priority.empty()!=true)
{
sw.max = fabs(*max_element(
priority.begin(),
priority.end(),
SchedulerHostPolicy::abs_cmp));
transform(
priority.begin(),
priority.end(),
priority.begin(),
sw);
}
return priority;
};
protected:
vector<float> priority;
virtual void policy(SchedulerVirtualMachine * vm) = 0;
SchedulerVirtualMachinePool * vmpool;
SchedulerHostPool * hpool;
private:
static bool abs_cmp(float fl1, float fl2)
{
return fabs(fl1)<fabs(fl2);
};
//--------------------------------------------------------------------------
class ScaleWeight
{
public:
ScaleWeight(float _weight):weight(_weight){};
~ScaleWeight(){};
float operator() (float pr)
{
if ( max == 0 )
{
return 0;
}
else
{
return weight * pr / max;
}
};
private:
friend class SchedulerHostPolicy;
float weight;
float max;
};
//--------------------------------------------------------------------------
ScaleWeight sw;
};
/* -------------------------------------------------------------------------- */
#endif /*SCHEDULER_POLICY_H_*/