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"""
Very basic network helpers to allow programs to easily reserve network ports and manage timeouts.
"""
import time
import socket
class Timer(object):
def __init__(self):
self.start_time_secs = time.time()
def elapsed_secs(self):
return time.time() - self.start_time_secs
class UnusedPort(object):
def __init__(self, port=0):
self.unused_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.unused_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.unused_socket.bind(("0.0.0.0", port))
self.addr, self.port = self.unused_socket.getsockname()
def release(self):
self.unused_socket.close()
self.unused_socket, self.addr, self.port = None, None, None
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