def initialize(self, canvas):
canvas.update()
canvas.delete('all')
# instantiate and create grid
grd = Memory()
grd.create_grid(canvas)
proc_list = []
mem_seg = []
mem_seg_free = []
# processes color
proc_color = 'green'
for i in range(50):
# random number for burst time
rdn_bt = random.randint(3, 7)
# random number for arrival time
rdn_at = random.randint(1, 50)
# random number for size
rdn_size = random.randint(1, 40)
# set process name
p_name = "p" + str(i)
p = Process(id_p=i,
name=p_name,
burst_time=rdn_bt,
color=proc_color,
arrival_time=rdn_at,
size=rdn_size)
proc_list.append(p)
# prepare memory/create 4 segments already filled
x = 100
x_bfr = 50
for i in range(4):
rdn_x1 = random.randint(x_bfr, x_bfr + 100)
rdn_x2 = random.randint(rdn_x1, rdn_x1 + 100)
seg = canvas.create_rectangle(rdn_x1,
20,
rdn_x2,
70,
fill='#4785e8')
print("I: ", str(i))
print("X1: ", str(rdn_x1))
print("X2: ", str(rdn_x2))
dif_size = rdn_x2 - rdn_x1
mg = Mem_Seg(name_ms="f" + str(i),
id_ms=i,
space=dif_size,
x1=rdn_x1,
x2=rdn_x2)
mem_seg.append(mg)
x_bfr = rdn_x2
x = x + 100
# define memory segmentation with these settings
for idx in range(len(mem_seg)):
# verify if it is the first occupied segment/OK
if idx == 0:
if mem_seg[idx].x1 > 50:
segment = Mem_Seg(name_ms="f" + str(i + 3),
id_ms=i + 3,
space=mem_seg[idx].x1 - 50,
x1=50,
x2=mem_seg[idx].x1)
mem_seg_free.append(segment)
else:
# if the segment is in the middle/OK
if mem_seg[idx].x1 > mem_seg[idx - 1].x2:
segment = Mem_Seg(name_ms="f" + str(i + 3),
id_ms=i + 3,
space=mem_seg[idx].x1 -
mem_seg[idx - 1].x2,
x1=mem_seg[idx - 1].x2,
x2=mem_seg[idx].x1)
mem_seg_free.append(segment)
# if it is the last segment
if idx == len(mem_seg) - 1:
if mem_seg[idx].x2 != 800:
segment = Mem_Seg(name_ms="f" + str(i + 3),
id_ms=i + 3,
space=800 - mem_seg[idx].x2,
x1=mem_seg[idx].x2,
x2=800)
mem_seg_free.append(segment)
return mem_seg_free, proc_list, mem_seg
