def main ():
#
# Get the configuration parameters from the user. Reset to default
# values if invalid input is entered.
#
try:
if len(sys.argv) == 3:
n = int(sys.argv[1])
m = int(sys.argv[2])
if (n <= 0 or m <= 0):
print("Invalid input. Resetting to default parameters.")
n = 10
m = 50
else:
print("Invalid input. Resetting to default parameters.")
n = 10
m = 50
except(ValueError, IndexError):
print("Invalid input. Resetting to default parameters.")
n = 10
m = 50
# Part 1 - Bakery Algorithm
# Print the banner!
print("Running Lamport's bakery algorithm")
print("")
# Initialize the thread list
thread_list_bakery = []
# Initialize the threads
for i in range(n) :
thread = Bakery.Bakery()
thread.set_pid(i)
thread_list_bakery.append(thread)
# Assign requests to threads randomly
for i in range (m):
# Pick a random thread and increment its request count
if (n > 1):
p = random.randint(0, n - 1)
else:
p = 0
thread = thread_list_bakery[p]
thread.pending_req = thread.pending_req + 1
#
# Call the setup routine to initialize shared variables.
# This will also start the threads.
#
Bakery.setup(thread_list_bakery, m)
# Part 2 - Fast Mutual Exclusion Algorithm
# Print the banner!
print("")
print("Running Lamport's fast mutual exclusion algorithm")
print("")
# Initialize the thread list
thread_list_fast = []
# Initialize the threads
for i in range(n) :
thread = Fast.Fast()
thread.set_pid(i)
thread_list_fast.append(thread)
# Assign requests to threads randomly
for i in range (m):
# Pick a random thread and increment its request count
if (n > 1):
p = random.randint(0, n - 1)
else:
p = 0
thread = thread_list_fast[p]
thread.pending_req = thread.pending_req + 1
#
# Call the setup routine to initialize shared variables.
# This will also start the threads.
#
Fast.setup(thread_list_fast, m)
import sys
if len(sys.argv)!=3:
sys.exit("\n\nwrong number of arguments, usage: python randnum.py threads requests\n\n")
thr = int(sys.argv[1])
req = int(sys.argv[2])
#initialising a list whose index represents the thread and its value the number requests assigned to it
assign = [0]*thr
# randomly distributing the requests among the threads
while req:
j = random.randrange(0, thr)
assign[j]+=1
req-=1
# just to check
for x in assign:
print (x)
print ("\nRunning Lamport's fast mutual exclusion algorithm\n")
Fast.spawnThreads(assign)
print ("\n\nRunning Lamport's bakery algorithm\n\n")
Bakery.spawnThreads(assign)