main.py 文件源码

def draw_wait_queue(self, wait_box, status_box, wait_to_memory_box, start_height, temp_memory, *args):
        wait_queue = temp_memory['processes_waiting']
        event_details = temp_memory['event']
        process_id,arrival_bit,curr_time,burst_time,process_size = event_details
        wait_to_memory = temp_memory['wait_to_memory']
        external_fragmentation = temp_memory['external_fragmentation']

        wait_flag=0 # to check whether process was added to the wait queue

        label = Label(text='Wait Queue: ', size_hint_x=None, width=self.margin_left, valign='top', halign='center')
        label.text_size = label.size
        wait_box.add_widget(label)

        s_label = Label(text='Status: ', size_hint_x=None, width=self.margin_left, valign='top', halign='center')
        s_label.text_size = s_label.size
        status_box.add_widget(s_label)

        wm_label = Label(text='Processes loaded into memory from wait queue: ', size_hint_x=None, width=self.margin_left  + kivy.metrics.dp(230), valign='top', halign='center')
        wm_label.text_size = wm_label.size
        wait_to_memory_box.add_widget(wm_label)

        if not wait_queue:
            w_label = Label(text='Empty', size_hint_x=None, width='50dp', halign='left', valign='top')
            w_label.text_size = w_label.size
            wait_box.add_widget(w_label)

        for process in wait_queue:
            process_name, process_s,process_burst = process
            if(process_name == process_id):# will only happen if arrival_bit=1
                wait_flag=1 # process was added to wait queue
            w_label = Label(text=str(process_name), size_hint_x=None, width='40dp', halign='left', valign='top')
            w_label.text_size = w_label.size
            wait_box.add_widget(w_label)

        if(arrival_bit == 1):
            if(wait_flag == 1 and external_fragmentation == 1):
                ss_label = Label(text='Process ' + str(process_id) + ' was added to the wait queue because of external fragmentation though enough free memory is available.', size_hint_x=None, width='800dp', halign='left', valign='top') 
            elif(wait_flag == 1 and external_fragmentation == 0):
                ss_label = Label(text='Process ' + str(process_id) + ' was added to the wait queue due to insufficient memory available.', size_hint_x=None, width='800dp', halign='left', valign='top')       
            else:
                ss_label = Label(text='Process ' + str(process_id) + ' was assigned a slot in the main memory.', size_hint_x=None, width='800dp', halign='left', valign='top') 

            wm_label = Label(text='None', size_hint_x=None, width='50dp', valign='top', halign='left')
            wm_label.text_size = wm_label.size
            wait_to_memory_box.add_widget(wm_label)    
        else:
            if not wait_to_memory:
                ss_label = Label(text='Process ' + str(process_id) + ' has succesfully been deallocated memory.', size_hint_x=None, width='800dp', halign='left', valign='top')
                wm_label = Label(text='None', size_hint_x=None, width='50dp', valign='top', halign='left')
                wm_label.text_size = wm_label.size
                wait_to_memory_box.add_widget(wm_label)    
            else: 
                ss_label = Label(text='Process ' + str(process_id) + ' has succesfully been deallocated memory. ', size_hint_x=None, width='800dp', halign='left', valign='top')
                for processes in wait_to_memory: 
                    wm_label =  Label(text= str(processes), size_hint_x=None, width='40dp', halign='left', valign='top')
                    wm_label.text_size = wm_label.size
                    wait_to_memory_box.add_widget(wm_label)

        ss_label.text_size = ss_label.size
        status_box.add_widget(ss_label)