- "Commenting The Source(tm)" 02-2006 - The best summer camp of the world - First part
git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@405 3ecf2c5c-341e-0410-92b4-d18e462d057c
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johnny
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@ -19,15 +19,23 @@
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#include "schedulable_status.hh"
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using namespace sgpem;
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using namespace std;
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SchedulableStatus::SchedulableStatus(const Schedulable& obj)
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: _ref(&obj), _last(-1), _time_left(obj.get_total_cpu_time()), _my_state(state_future)
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{
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SchedulableStatus::SchedulableStatus(const Schedulable& obj) :
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_ref(&obj), _last(-1), _time_left(obj.get_total_cpu_time()),
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_my_state(state_future)
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{
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}
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int
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bool
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SchedulableStatus::operator==(const SchedulableStatus& dx) const
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{
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return (_ref==dx._ref)&&(_last==dx._last)&&(_time_left==dx._time_left)&&(_my_state==dx._my_state);
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}
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int
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SchedulableStatus::get_cpu_time_left() const
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{
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return _time_left;
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@ -70,12 +78,3 @@ SchedulableStatus::get_schedulable() const
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{
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return _ref;
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}
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bool
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SchedulableStatus::operator==(const SchedulableStatus& dx) const
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{
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return (_ref==dx._ref)&&(_last==dx._last)&&(_time_left==dx._time_left)&&(_my_state==dx._my_state);
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}
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@ -26,51 +26,82 @@
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namespace sgpem
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{
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class SchedulableStatus;
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/** \brief Desribes the state of a schedulable entity in a particular moment of the simulation
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This class desribes the state of a schedulable entity in a particular moment of the simulation.
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Stores part of informations deeded by Scheduler to manage processes and other ones.
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Objects SchedulableStatus are created by Scheduler and destroyed by SimulationStatus if they are linked to it
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or by Scheduler.
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*/
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/** \brief Desribes the state of a schedulable entity in a particular moment
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* of the simulation
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*
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* This class stores part of the information deeded by the Scheduler to
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* manage processes and other ones.
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*
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* Objects of type SchedulableStatus are created by the Scheduler and are
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* destroyed by SimulationStatus if they are linked to it or by the Scheduler.
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*/
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class SG_DLLEXPORT SchedulableStatus
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{
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public:
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enum state
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{
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state_running = 1<<0,
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state_ready = 1<<1,
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state_blocked = 1<<2,
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state_future = 1<<3,
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state_terminated = 1<<4
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};
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/** \brief This flag describes the actual state of the schedulable
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*
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* You can think of this flag as the particular stack in the OS where the
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* process are placed during their lifetime. In the OS there are three
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* main stacks that are Running processes, Read processes, and Blocked
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* processes. These are emulated in a single list by this flag.
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*/
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enum state
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{
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state_running = 1<<0,
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state_ready = 1<<1,
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state_blocked = 1<<2,
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state_future = 1<<3,
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state_terminated = 1<<4
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};
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/** \brief Object constructor */
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SchedulableStatus(const Schedulable& obj);
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//SchedulableStatus(const SchedulableStatus& obj); //copy constructor
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/** \brief Verify if two instances represents the same situation
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*
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* This trivial overloading of the equal operator simply verifies if the
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* actual represented process is the same, and if the status is also the
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* same.
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*/
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bool operator==(const SchedulableStatus&) const;
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int get_cpu_time_left() const;
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void give_cpu_time(const int& time);
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void set_last_scheduled(const int& time);
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int get_last_scheduled() const;
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state get_state() const;
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void set_state(state s);
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const Schedulable* get_schedulable() const;
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/** \brief Returns the remaining CPU time */
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int get_cpu_time_left() const;
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/** \brief Decrements cpu time left by this amount until it reaches zero */
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void give_cpu_time(const int& time);
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/** \brief Sets the time when this process was last scheduled */
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void set_last_scheduled(const int& time);
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/** \brief Gets the time when this process was last scheduled */
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int get_last_scheduled() const;
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/** \brief Returns the schedule stack in which this process resides
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* \see state */
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state get_state() const;
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/** \brief Sets the state of this process
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* \see state */
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void set_state(state s);
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/** \brief Returns a pointer to the schedulable object
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*
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* This function returns a pointer to the actual schedable object
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* represented, along with its status, by this instance.
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*/
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const Schedulable* get_schedulable() const;
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private:
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const Schedulable* _ref;
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int _last;
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int _time_left;
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state _my_state;
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state _my_state;
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};
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}
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#endif
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