task.py

RUNNING   = 0   # Currently executing on the processor
READY     = 1   # Ready to run but task of higher or equal priority is currently running
BLOCKED   = 2   # Task is waiting for some condition to be met to move to READY state
SUSPENDED = 3   # Task is waiting for some other task to unsuspend
COMPLETED = 4   # Task is completed

INTERRUPT =0  # Task type is interrupt
PERIODIC  =1  # Task type is periodic
APERIODIC =2  # Task type is aperiodic
SPORADIC  =3  # Task type is sporadic


class Task (object):
    """Task Object Class

    Attributes:
        priority (int): Priority of the task
        name (str): Name of the task
        state (int): State of the task
        type (int): Type of the task
        act_time (int): Activation time of the task
        period (int): Period of the task
        wcet (int): Worst case execution time of the task
        deadline (int): Deadline of the task
    """
    def __init__(self,priority=255,name=None,state=SUSPENDED,type=None,act_time=0,period=0,wcet=0,deadline=1000, relative_deadline=0):
        self.priority = priority
        self.name = name
        self.state = state
        self.type = type
        self.act_time = act_time
        self.period = period
        self.wcet = wcet
        self.remaining_time = wcet
        self.completion_time = None
        self.deadline = deadline
        self.relative_deadline = relative_deadline        
    
    def change_state(self,state) -> None:
        """Change the state of the task

        Args:
            state (int): New state of the task
        """
        self.state = state

    def change_priority(self,priority) -> None:
        """Change the priority of the task

        Args:
            priority (int): New priority of the task
        """
        self.priority = priority