def sm_hd(to_hd=False, hd_read_info=[]):
'''
Channel3 moves data
from hd to mem - to_hd == False
from sm to hd - to_hd == True
'''
write_info = []
block_num = 0
word_num = 0
if to_hd:
# move data from SM to hard disk
while len(write_info) != len(data.SM):
if block_num * BUFFER_SIZE + word_num not in data.HD_BLOCKS:
write_info.append([block_num, word_num])
if word_num >= BLOCK_SIZE - 1:
block_num += 1
word_num = (word_num + 1) % (BLOCK_SIZE)
for i in range(len(data.SM)):
external_memory.write(data.SM[i], write_info[i][0],
write_info[i][1])
return write_info
else:
data.SM = []
for i in hd_read_info:
data.SM.append(external_memory.fetch(i[0], i[1]))
def sm_hd(to_hd = False, hd_read_info = []):
'''
Channel3 moves data
from hd to mem - to_hd == False
from sm to hd - to_hd == True
'''
write_info = []
block_num = 0
word_num = 0
if to_hd:
# move data from SM to hard disk
while len(write_info) != len(data.SM):
if block_num * BUFFER_SIZE + word_num not in data.HD_BLOCKS:
write_info.append([block_num, word_num])
if word_num >= BLOCK_SIZE - 1:
block_num += 1
word_num = (word_num + 1) % (BLOCK_SIZE)
for i in range(len(data.SM)):
external_memory.write(data.SM[i], write_info[i][0], write_info[i][1])
return write_info
else:
data.SM = []
for i in hd_read_info:
data.SM.append(external_memory.fetch(i[0], i[1]))
def hd_to_um(hd_read_data=[]):
'''
move data from hd to user memory
one-way communication
Reads given data fields from HD and transfers them to User memory
'''
addresses = user_memory.occupy_empty_area(len(hd_read_data))
if addresses is None:
return None
j = 0
for i in hd_read_data:
#logger.log("J: " + str(j))
#logger.log("ADDresses len: " + str(len(addresses)))
#logger.log("HD READ data: " + str(len(hd_read_data)))
user_memory.write(external_memory.fetch(i[0], i[1]), addresses[j])
j += 1
return addresses
def hd_to_um(hd_read_data = []):
'''
move data from hd to user memory
one-way communication
Reads given data fields from HD and transfers them to User memory
'''
addresses = user_memory.occupy_empty_area(len(hd_read_data))
if addresses is None:
return None
j = 0
for i in hd_read_data:
#logger.log("J: " + str(j))
#logger.log("ADDresses len: " + str(len(addresses)))
#logger.log("HD READ data: " + str(len(hd_read_data)))
user_memory.write(external_memory.fetch(i[0], i[1]), addresses[j])
j += 1
return addresses
user_memory.write(external_memory.fetch(i[0], i[1]), addresses[j])
j += 1
return addresses
if __name__ == '__main__':
# SM and HD communication
data.SM = ["aaaa"] * 40
for x in range(10):
data.SM.append("bbbb")
print data.SM
print len(data.SM)
read_in = sm_hd(True)
print read_in
print len(read_in)
for i in range(15):
print external_memory.fetch(0, i)
print data.HD_BLOCKS
print(len(data.HD_BLOCKS))
sm_hd(False, read_in)
print data.SM
# HD and UM communication
a = hd_to_um(read_in)
print "USER MEMORY"
for addr in a:
print user_memory.fetch(addr)
user_memory.write(external_memory.fetch(i[0], i[1]), addresses[j])
j += 1
return addresses
if __name__ == '__main__':
# SM and HD communication
data.SM = ["aaaa"] * 40
for x in range(10):
data.SM.append("bbbb")
print data.SM
print len(data.SM)
read_in = sm_hd(True)
print read_in
print len(read_in)
for i in range(15):
print external_memory.fetch(0, i)
print data.HD_BLOCKS
print(len(data.HD_BLOCKS))
sm_hd(False, read_in)
print data.SM
# HD and UM communication
a = hd_to_um(read_in)
print "USER MEMORY"
for addr in a:
print user_memory.fetch(addr)
