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- Write interface for History and ConcreteHistory 

- Write interface for HistoryObserver
- Remove obsolete interfaces


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@690 3ecf2c5c-341e-0410-92b4-d18e462d057c
This commit is contained in:
tchernobog 2006-07-02 15:27:30 +00:00
parent 759b90b017
commit b8f7083bfc
13 changed files with 236 additions and 431 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Makefile.am
View File

@ -145,6 +145,7 @@ src_backend_libbackend_la_LDFLAGS = \
# Please keep this in sorted order: # Please keep this in sorted order:
src_backend_libbackend_la_SOURCES = \ src_backend_libbackend_la_SOURCES = \
src/backend/concrete_environment.cc \ src/backend/concrete_environment.cc \
src/backend/concrete_history.cc \
src/backend/dynamic_process.cc \ src/backend/dynamic_process.cc \
src/backend/dynamic_request.cc \ src/backend/dynamic_request.cc \
src/backend/dynamic_resource.cc \ src/backend/dynamic_resource.cc \
@ -154,7 +155,7 @@ src_backend_libbackend_la_SOURCES = \
src/backend/environment.cc \ src/backend/environment.cc \
src/backend/global_preferences.cc \ src/backend/global_preferences.cc \
src/backend/history.cc \ src/backend/history.cc \
src/backend/observed_subject.cc \ src/backend/history_observer.cc \
src/backend/policies_gatekeeper.cc \ src/backend/policies_gatekeeper.cc \
src/backend/policy.cc \ src/backend/policy.cc \
src/backend/policy_manager.cc \ src/backend/policy_manager.cc \
@ -164,7 +165,6 @@ src_backend_libbackend_la_SOURCES = \
src/backend/request.cc \ src/backend/request.cc \
src/backend/resource.cc \ src/backend/resource.cc \
src/backend/schedulable.cc \ src/backend/schedulable.cc \
src/backend/schedulable_queue.cc \
src/backend/scheduler.cc \ src/backend/scheduler.cc \
src/backend/slice.cc \ src/backend/slice.cc \
src/backend/static_process.cc \ src/backend/static_process.cc \
@ -185,7 +185,7 @@ pkginclude_HEADERS += \
src/backend/environment.hh \ src/backend/environment.hh \
src/backend/global_preferences.hh \ src/backend/global_preferences.hh \
src/backend/history.hh \ src/backend/history.hh \
src/backend/observed_subject.hh \ src/backend/history_observer.hh \
src/backend/plugin.hh \ src/backend/plugin.hh \
src/backend/policies_gatekeeper.hh \ src/backend/policies_gatekeeper.hh \
src/backend/policy.hh \ src/backend/policy.hh \
@ -196,7 +196,6 @@ pkginclude_HEADERS += \
src/backend/resource.hh \ src/backend/resource.hh \
src/backend/process.hh \ src/backend/process.hh \
src/backend/schedulable.hh \ src/backend/schedulable.hh \
src/backend/schedulable_queue.hh \
src/backend/scheduler.hh \ src/backend/scheduler.hh \
src/backend/slice.hh \ src/backend/slice.hh \
src/backend/sub_request.hh \ src/backend/sub_request.hh \
@ -207,6 +206,7 @@ pkginclude_HEADERS += \
# They won't be installed for the end-user. # They won't be installed for the end-user.
noinst_HEADERS += \ noinst_HEADERS += \
src/backend/concrete_environment.hh \ src/backend/concrete_environment.hh \
src/backend/concrete_history.hh \
src/backend/dynamic_process.hh \ src/backend/dynamic_process.hh \
src/backend/dynamic_request.hh \ src/backend/dynamic_request.hh \
src/backend/dynamic_resource.hh \ src/backend/dynamic_resource.hh \

46
src/backend/observed_subject.cc → src/backend/concrete_history.cc
View File

@ -1,4 +1,4 @@
// src/backend/observedSubject.cc - Copyright 2005, 2006, University // src/backend/concrete_history.cc - Copyright 2005, 2006, University
// of Padova, dept. of Pure and Applied // of Padova, dept. of Pure and Applied
// Mathematics // Mathematics
// //
@ -18,47 +18,7 @@
// along with SGPEMv2; if not, write to the Free Software // along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include "observed_subject.hh" #include "config.h"
using namespace std;
using namespace sgpem;
ObservedSubject::~ObservedSubject()
{}
/**
Calls update() in each Observer
*/
void
ObservedSubject::notify()
{
for(vector<Observer*>::iterator i = _attached.begin(); i < _attached.end(); i++)
(*i)->update();
}
/**
Attachs an Observer to this ObservedSubject.
*/
void
ObservedSubject::attach(Observer* o)
{
_attached.push_back(o);
}
/**
Detachs the observer from this ObservedSubject.
*/
bool
ObservedSubject::detach(Observer* o)
{
vector<Observer*>::iterator i = find(_attached.begin(), _attached.end(), o);
if (i == _attached.end())
return false;
_attached.erase(i); // FOUND and POPPED
return true;
}
#include "concrete_history.hh"

106
src/backend/concrete_history.hh Normal file
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@ -0,0 +1,106 @@
// src/backend/concrete_history.hh - Copyright 2005, 2006, University
// of Padova, dept. of Pure and Applied
// Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef CONCRETE_HISTORY_HH
#define CONCRETE_HISTORY_HH 1
#include "config.h"
#include "concrete_environment.hh"
#include "dynamic_process.hh"
#include "dynamic_request.hh"
#include "dynamic_resource.hh"
#include "dynamic_sub_request.hh"
#include "dynamic_thread.hh"
#include "history.hh"
#include <glibmm/ustring.h>
#include <map>
#include <stdexcept>
#include <utility>
#include <vector>
namespace sgpem
{
class ConcreteHistory;
class SG_DLLLOCAL ConcreteHistory : public History
{
public:
typedef const std::pair<resource_key_t, DynamicResource&> DynamicResourcePair;
ConcreteHistory();
ConcreteHistory(const ConcreteHistory&);
virtual ~ConcreteHistory();
virtual void append_new_environment(ConcreteEnvironment* environment);
virtual size_t get_size();
virtual const ConcreteEnvironment& get_last_environment() const;
virtual const ConcreteEnvironment& get_environment_at() const throw(std::out_of_range);
virtual void remove(const Resource& resource);
virtual void remove(const Process& process);
virtual void remove(const Thread& thread);
virtual void remove(const Request& request);
virtual void remove(const SubRequest& subrequest);
virtual ResourcePair& add_resource(const Glib::ustring& name,
bool preemptable = false,
size_t places = 1,
size_t availability = 0);
virtual DynamicProcess& add_process(const Glib::ustring& name,
time_t arrival_time,
prio_t base_priority = 0);
virtual DynamicThread& add_thread(const Glib::ustring& name,
Process& parent,
time_t arrival_time = 0,
prio_t base_priority = 0);
virtual DynamicRequest& add_request(Thread& owner,
time_t instant);
virtual DynamicSubRequest& add_subrequest(Request& request,
resource_key_t resource_key,
time_t duration,
size_t places = 1);
virtual void reset(bool notify = true);
protected:
typedef std::vector<ConcreteEnvironment*> Snapshots;
Snapshots _snapshots;
virtual void notify_change();
private:
// Disable assignment, implement it only if needed
ConcreteHistory& operator=(const ConcreteHistory& op2);
}; //~ class ConcreteHistory
}//~ namespace sgpem
#endif //~ CONCRETE_HISTORY_HH

137
src/backend/history.cc
View File

@ -21,147 +21,26 @@
#include "config.h" #include "config.h"
#include "history.hh" #include "history.hh"
#include "dynamic_process.hh"
#include "dynamic_thread.hh"
// Do not include in header file: #include <algorithm>
#include "singleton.tcc"
#include "smartp.tcc"
#include <exception>
using namespace std;
using namespace sgpem; using namespace sgpem;
using namespace memory;
// Explicit template instantiation to allow to export symbols from the DSO. History::~History()
template class SG_DLLEXPORT Singleton<History>;
// FIXME: These two should disappear!!!
template class SG_DLLEXPORT smart_ptr<ReadyQueue>;
template class SG_DLLEXPORT smart_ptr<DynamicSchedulable>;
/**
The constructor sets _total_time_elapsed to -1: this permits to insert the INITIAL STATUS
of the simulation which must begin at instant -1 and live for 1 instant.
*/
History::History() //private constructor.
:
_total_time_elapsed(-1)
{}
/**
Returns a pointer to a copy of the DynamicSchedulable object relative to this instant.
It can be NULL if time is out of range or if there are no running entities in the associated
ReadyQueue
*/
smart_ptr<DynamicSchedulable>
History::get_scheduled_at(int time) const
{ {
if (time > _total_time_elapsed || time < 0) //out of range
return smart_ptr<DynamicSchedulable>(NULL);
//look for a runing entity
smart_ptr<ReadyQueue> p = get_simulation_status_at(time);
for (uint i = 0; i < p->size(); i++)
if (p->get_item_at(i).get_state() == DynamicSchedulable::state_running)
{
// Copy the right object
// FIXME: this code has to be reworked (probably ditched by the new ConcreteHistory)
Schedulable* tmp = &p->get_item_at(i);
DynamicProcess* proc;
DynamicThread* thread;
if((proc = dynamic_cast<DynamicProcess*>(tmp)) != NULL)
return smart_ptr<DynamicSchedulable>(new DynamicProcess(*proc));
else if((thread = dynamic_cast<DynamicThread*>(tmp)) != NULL)
return smart_ptr<DynamicSchedulable>(new DynamicThread(*thread));
else
throw std::bad_cast();
} }
return smart_ptr<DynamicSchedulable>(NULL);
}
/**
Returns a pointer to a copy of the SimulationStatus object relative to this instant or NULL
if time is out of range.
*/
smart_ptr<ReadyQueue>
History::get_simulation_status_at(int time) const
{
if (time > _total_time_elapsed || time < 0) //out of range
return smart_ptr<ReadyQueue>(NULL);
int trascorso = -1;
for(vector<Slice>::const_iterator i = _slices.begin(); i < _slices.end(); i++)
if (time <= trascorso + i->get_duration()) //FOUND!!
return smart_ptr<ReadyQueue>(new ReadyQueue(*i->get_simulation_status()));
else //Go on...
trascorso += i->get_duration();
//never reached if all slices are CONTIGUOUS (ans THIS shoul be!!)!!!
return smart_ptr<ReadyQueue>(NULL);
}
int
History::get_current_time() const
{
return _total_time_elapsed;
}
/**
Appends to the history a SimulationStatus creating a Slice with duration of 1 instant.
Calls the method notify() in quality of ObservedSubject, updating all observers.
*/
void void
History::enqueue_slice(const ReadyQueue& status) History::attach(HistoryObserver& observer)
{ {
if(_slices.size() == 0) _observers.push_back(&observer);
{
_slices.push_back(Slice(-1, 1, status));
_total_time_elapsed++;
notify();
return;
} }
//check the last slice
Slice& last = _slices[_slices.size()-1];
if (last.get_simulation_status()->has_same_objects(status)) //increments the duration by ONE unit
{
last.set_duration(last.get_duration() + 1);
}
else //insert a new slice CONTIGUOUS to the last one
{
_slices.push_back(Slice(last.get_started_at() + last.get_duration(), 1, status));
}
_total_time_elapsed++; //one instant is passed...
notify();
}
/**
Removes all the informations about the simulation following the specified instant.
Ex. truncate_at(0); removes all scheduled slices
Ex. truncate_at(-1); removes all scheduled slices and the initial status
*/
void void
History::truncate_at(int instant) History::detach(const HistoryObserver& observer)
{ {
vector<Slice>::iterator i = _slices.begin(); _observers.erase(std::find(_observers.begin(),
//reach the instant _observers.end(),
while (i != _slices.end()) &observer));
if (i->get_started_at() < instant)
i++;
else
{
//replaces the current vector with the "trimmed" one.
_slices = vector<Slice>(_slices.begin(), i);
_total_time_elapsed = instant;
break;
} }
notify();
}

112
src/backend/history.hh
View File

@ -23,21 +23,17 @@
#include "config.h" #include "config.h"
#include "environment.hh"
#include <glibmm/ustring.h>
#include <stdexcept>
#include <utility>
#include <vector> #include <vector>
#include <iostream>
#include "slice.hh"
#include "observed_subject.hh"
#include "ready_queue.hh"
#include "dynamic_schedulable.hh"
#include "smartp.hh"
// Do not include complete template definition here:
#include "singleton.hh"
namespace sgpem namespace sgpem
{ {
/** \brief Manages the history of the simulation /** \brief Manages the history of the simulation
Manages the history of the simulation from the instant 0 to the current time, Manages the history of the simulation from the instant 0 to the current time,
@ -46,59 +42,73 @@ namespace sgpem
In a future iteration it will be possible to revert the entire simulation to a state In a future iteration it will be possible to revert the entire simulation to a state
present in the history ("undo operation") present in the history ("undo operation")
*/ */
class History; class History;
class SG_DLLEXPORT History : public Singleton<History>, public ObservedSubject // Forward declarations:
class HistoryObserver;
class Resource;
class Process;
class Thread;
class Request;
class SubRequest;
class SG_DLLEXPORT History
{ {
friend class Singleton<History>;
public: public:
/** typedef unsigned int size_t;
Gets the \ref Schedulable object running at the specified time. typedef unsigned int time_t;
\param time The inquired time instant. typedef int prio_t;
\return The Schedulable object running at the given time. typedef int resource_key_t;
*/ typedef const std::pair<resource_key_t, Resource&> ResourcePair;
virtual memory::smart_ptr<sgpem::DynamicSchedulable> get_scheduled_at(int time) const;
/** virtual ~History() = 0;
Gets the status of simulation at the specified time.
\param time The inquired time instant.
\return The list of Schedulable status objects at the specified time.
*/
virtual memory::smart_ptr<sgpem::ReadyQueue> get_simulation_status_at(int time) const;
/** virtual size_t get_size() = 0;
Gets the current time. virtual const Environment& get_last_environment() const = 0;
\return The current history time. virtual const Environment& get_environment_at() const throw(std::out_of_range) = 0;
*/
virtual int get_current_time() const;
/** virtual void remove(const Resource& resource) = 0;
Sets the status of simulation at the current time. virtual void remove(const Process& process) = 0;
\param status The list of \ref Schedulable status objects at the current time. virtual void remove(const Thread& thread) = 0;
*/ virtual void remove(const Request& request) = 0;
virtual void enqueue_slice(const sgpem::ReadyQueue& status); virtual void remove(const SubRequest& subrequest) = 0;
/**
Remove all data in History following the specified time. virtual ResourcePair& add_resource(const Glib::ustring& name,
\param instant Desired cutting time. bool preemptable = false,
*/ size_t places = 1,
virtual void truncate_at(int instant); size_t availability = 0) = 0;
virtual Process& add_process(const Glib::ustring& name,
time_t arrival_time,
prio_t base_priority = 0) = 0;
virtual Thread& add_thread(const Glib::ustring& name,
Process& parent,
time_t arrival_time = 0,
prio_t base_priority = 0) = 0;
virtual Request& add_request(Thread& owner,
time_t instant) = 0;
virtual SubRequest& add_subrequest(Request& request,
resource_key_t resource_key,
time_t duration,
size_t places = 1) = 0;
virtual void attach(HistoryObserver& observer);
virtual void detach(const HistoryObserver& observer);
protected: protected:
History(); //private constructor. typedef std::vector<HistoryObserver*> RegisteredObservers;
History(const History&); RegisteredObservers _observers;
History& operator=(const History&);
private: virtual void notify_change() = 0;
int _total_time_elapsed;
std::vector<sgpem::Slice> _slices; }; //~ class History
};
}//~ namespace sgpem }//~ namespace sgpem
#endif //HISTORY_H #endif //~ HISTORY_HH

25
src/backend/history_observer.cc Normal file
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@ -0,0 +1,25 @@
// src/backend/history_observer.cc - Copyright 2005, 2006, University
// of Padova, dept. of Pure and Applied
// Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include "history_observer.hh"
sgpem::HistoryObserver::~HistoryObserver() {}
// Pure abstract class. Nothing else to put here.

42
src/backend/slice.cc → src/backend/history_observer.hh
View File

@ -1,4 +1,4 @@
// src/backend/silce.cc - Copyright 2005, 2006, University // src/backend/history_observer.hh - Copyright 2005, 2006, University
// of Padova, dept. of Pure and Applied // of Padova, dept. of Pure and Applied
// Mathematics // Mathematics
// //
@ -18,36 +18,26 @@
// along with SGPEMv2; if not, write to the Free Software // along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#include "slice.hh" #ifndef HISTORY_OBSERVER_HH
using namespace sgpem; #define HISTORY_OBSERVER_HH 1
using namespace std;
#include "config.h"
Slice::Slice(const int& start, const int& duration, const ReadyQueue& status) namespace sgpem
: _ref(status), _started_at(start), _duration(duration)
{}
const ReadyQueue*
Slice::get_simulation_status() const
{ {
return &_ref; class History;
} class HistoryObserver;
int class SG_DLLEXPORT HistoryObserver
Slice::get_started_at() const
{ {
return _started_at; public:
} virtual void update(History& changed_history) = 0;
virtual ~HistoryObserver();
int }; // class HistoryObserver
Slice::get_duration() const
{ }//~ namespace sgpem
return _duration;
} #endif //HISTORY_OBSERVER_H
void
Slice::set_duration(const int& i)
{
_duration = i;
}

75
src/backend/observed_subject.hh
View File

@ -1,75 +0,0 @@
// src/backend/observedSubject.hh - Copyright 2005, 2006, University
// of Padova, dept. of Pure and Applied
// Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef OBSERVEDSUBJECT_HH
#define OBSERVEDSUBJECT_HH 1
#include "config.h"
#include <vector>
#include <algorithm>
#include "../observer.hh"
namespace sgpem
{
class ObservedSubject;
/** \brief Represents an observed entity.
Abstract class which represents an observed entity. It calls Update() in all Observer objects
which are attached to it. See the "Observer Pattern" for more informations.
*/
class SG_DLLEXPORT ObservedSubject
{
public:
virtual ~ObservedSubject() = 0;
/**
This method calls Update() on each attached Observer. It should be called when the internal state
of the ObservedSubject is changed and Observers have to be updated.
*/
void notify();
/**
\brief Adds an Observer object to the internal list.
*/
void attach(sgpem::Observer*);
/**
\brief Removes an Observer object from the internal list.
\returns TRUE if the Observer object has been previously attached (is found in the list);
\returns FALSE otherwise.
*/
bool detach(sgpem::Observer*);
private:
std::vector<Observer*> _attached;
};
} //~ namespace sgpem
#endif

1
src/backend/policy.cc
View File

@ -21,7 +21,6 @@
#include "policy.hh" #include "policy.hh"
using namespace std; using namespace std;
using namespace sgpem; using namespace sgpem;
using namespace memory;
Policy::~Policy() Policy::~Policy()
{} {}

21
src/backend/ready_queue.cc
View File

@ -29,15 +29,15 @@ void
ReadyQueue::swap(position a, position b) ReadyQueue::swap(position a, position b)
throw (std::out_of_range) throw (std::out_of_range)
{ {
size_t size = _scheds.size();
if(a > size || b > size)
throw std::out_of_range(_("Trying to access a Schedulable "
"with an index outside of the "
"queue limits."));
if(a == b) return; if(a == b) return;
Schedulable* temp = _scheds[a]; // Usage of "at()" isn't casual:
_scheds[a] = _scheds[b]; // at() checks indexes, "[]" doesn't.
// Once we've done the check once, we
// can assume it's safe to use "[]";
// this for performance reasons.
Schedulable* temp = _scheds.at(a);
_scheds[a] = _scheds.at(b);
_scheds[b] = temp; _scheds[b] = temp;
} }
@ -53,11 +53,8 @@ sgpem::Schedulable&
ReadyQueue::get_item_at(position index) ReadyQueue::get_item_at(position index)
throw (std::out_of_range) throw (std::out_of_range)
{ {
if(index > size()) // Checks index access
throw std::out_of_range(_("Trying to access a Schedulable " return *_scheds.at(index);
"with an index outside of the "
"queue limits."));
return *(_scheds[index]);
} }

1
src/backend/scheduler.cc
View File

@ -30,7 +30,6 @@
#include <iostream> #include <iostream>
using namespace std; using namespace std;
using namespace sgpem; using namespace sgpem;
using namespace memory;
// Explicit template instantiation to allow to export symbols from the DSO. // Explicit template instantiation to allow to export symbols from the DSO.
template class SG_DLLEXPORT Singleton<Scheduler>; template class SG_DLLEXPORT Singleton<Scheduler>;

1
src/backend/scheduler.hh
View File

@ -32,7 +32,6 @@ namespace sgpem
#include <limits> #include <limits>
#include <iostream> #include <iostream>
#include "observed_subject.hh"
#include "history.hh" #include "history.hh"
#include "ready_queue.hh" #include "ready_queue.hh"
#include "user_interrupt_exception.hh" #include "user_interrupt_exception.hh"

84
src/backend/slice.hh
View File

@ -1,84 +0,0 @@
// src/backend/slice.hh - Copyright 2005, 2006, University
// of Padova, dept. of Pure and Applied
// Mathematics
//
// This file is part of SGPEMv2.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// SGPEMv2 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with SGPEMv2; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef SLICE_HH
#define SLICE_HH 1
#include "config.h"
#include "ready_queue.hh"
namespace sgpem
{
class Slice;
/** \brief Represents a slice of time during which some characteristic of the state of the simulation are constant
Represents a slice of time during which some characteristic of the state of the simulation are constant.
It holds a \ref SimulationStatus object which can be accessed through getSimulationStatus()
*/
class SG_DLLEXPORT Slice
{
public:
/**
Constructor for Slice.
\param start The Slice's starting time.
\param duration Time length of Slice.
\param status Photoshot of all \ref Schedulable during this Slice.
*/
Slice(const int& start, const int& duration, const ReadyQueue& status);
/**
Gets a constant reference to the \ref ReadyQueue object for this Slice.
\return The reference (constant) to the ReadyQueue object for this Slice.
*/
const ReadyQueue* get_simulation_status() const;
/**
Gets starting time of this Slice.
\return The starting time.
*/
int get_started_at() const;
/**
Gets duration of this Slice.
\return The duration time.
*/
int get_duration() const;
/**
Sets duration of this Slice.
\param duration The desired duration time.
*/
void set_duration(const int& duration);
private:
ReadyQueue _ref;
int _started_at;
int _duration;
};
} //~ namespace sgpem
#endif