/// <summary>
/// Third part of multi_level_feedback_queue
/// </summary>
void process_finished()
{
pcb_contents pc = PCB[running_id];
pc.status = "finished";
PCB[running_id] = pc;
}
/// <summary>
/// Change the state
/// </summary>
/// <param name="id"></param>
/// <param name="current_state"></param>
void state_switching(int id, string current_state)
{
pcb_contents pc = PCB[id];
pc.status = current_state;
PCB[id] = pc;
}
/**
* FOURTH
* PRINT
* */
/// <summary>
/// First print
/// </summary>
/// <param name="left_process_id">Prevoius process id</param>
/// <param name="current_process_id"></param>
/// <param name="slice_times">The times of time_slice</param>
///
void print_process_scheduling(int left_process_id, int current_process_id, int slice_times)
{
pcb_contents current_pcb = PCB[current_process_id];
pcb_contents left_pcb = PCB[current_process_id];
textBox2.AppendText(System.Environment.NewLine + System.Environment.NewLine + "The Process ‘" + current_process_id + "’ is running in time - slice " + slice_times + "’”" + System.Environment.NewLine + System.Environment.NewLine);
textBox2.AppendText("PCB" + System.Environment.NewLine);
textBox2.AppendText("Current Process ID:" + current_process_id + System.Environment.NewLine + "Status:" + PCB[current_process_id].status + System.Environment.NewLine + "Priority:" + PCB[current_process_id].priority + System.Environment.NewLine + "Runtime:" + current_pcb.runtime + System.Environment.NewLine + "IO time: " + current_pcb.io_time + System.Environment.NewLine + "IO duration:" + current_pcb.io_duration + System.Environment.NewLine + "IO type:" + current_pcb.io_type + System.Environment.NewLine + System.Environment.NewLine);
if (left_process_id == -1)
{
textBox2.AppendText("Previous Process: []");
}
else
{
textBox2.AppendText("Previous Process ID:" + left_process_id + System.Environment.NewLine + "Status:" + PCB[left_process_id].status + System.Environment.NewLine + "Priority:" + PCB[left_process_id].priority + System.Environment.NewLine + "Runtime:" + left_pcb.runtime + System.Environment.NewLine + "IO time: " + left_pcb.io_time + System.Environment.NewLine + "IO duration:" + left_pcb.io_duration + System.Environment.NewLine + "IO type:" + left_pcb.io_type + System.Environment.NewLine + System.Environment.NewLine);
}
//写文件
write_print_txt();
}
/// <summary>
/// One loop is one Scheduling, and it's one time_slice,
/// In other part of the loop, make the process state switch.
/// </summary>
void multi_level_feedback_queue()
{
double current_time_slice;
int finished_number = 0;
while (finished_number < PCB.Count)
{
int previous_id = running_id;
//jishu
slice_times++;
current_time_slice = process_schedule(previous_id);
//new code
if (three_time[running_id].cpu_time1 > 0)
{
double time1 = three_time[running_id].cpu_time1 - current_time_slice;
if (time1 > 0)
{
ready_queue_2.Enqueue(running_id);
pcb_contents pc = PCB[running_id];
pc.priority = 2;
PCB[running_id] = pc;
three_times tt1 = three_time[running_id];
tt1.cpu_time1 = time1;
three_time[running_id] = tt1;
//
state_switching(running_id, "ready");
textBox2.AppendText(System.Environment.NewLine + "====RUNNING TO READY=====" + System.Environment.NewLine);
print_state_switching();
}
// Block
else if (time1 <= 0 && three_time[running_id].io_time > 0)
{
current_time_slice += time1;
// update
three_times tt1 = three_time[running_id];
tt1.cpu_time1 = 0;
three_time[running_id] = tt1;
if (PCB[running_id].io_type == "Black and white print")
{
print_queue.Enqueue(running_id);
}
else
{
color_printing_queue.Enqueue(running_id);
}
//
state_switching(running_id, "block");
textBox2.AppendText(System.Environment.NewLine + "====RUNNING TO BLOCK=====" + System.Environment.NewLine);
print_state_switching();
}
// finshed
else
{
current_time_slice += time1;
process_finished();
finished_number++;
//
state_switching(running_id, "finished");
textBox2.AppendText(System.Environment.NewLine + "====FINISHED=====" + System.Environment.NewLine);
print_state_switching();
}
}
else
{
double time1 = three_time[running_id].cpu_time2 - current_time_slice;
// priority -= 1
if (time1 > 0)
{
ready_queue_2.Enqueue(running_id);
pcb_contents pc = PCB[running_id];
pc.priority = 2;
PCB[running_id] = pc;
three_times tt1 = three_time[running_id];
tt1.cpu_time1 = time1;
three_time[running_id] = tt1;
//
state_switching(running_id, "ready");
textBox2.AppendText(System.Environment.NewLine + "====RUNNING TO READY=====" + System.Environment.NewLine);
print_state_switching();
}
// finshed
else
{
current_time_slice += time1;
process_finished();
finished_number++;
//
state_switching(running_id, "finshed");
textBox2.AppendText(System.Environment.NewLine + "====FINISHED=====" + System.Environment.NewLine);
print_state_switching();
}
}
// Run the IO
all_process_block_wakeup(current_time_slice);
}
// Process revocation
process_delete();
}