# encoding: utf-8
"""
usage.py

Created by Thomas Mangin on 2009-09-06.
Copyright (c) 2009-2017 Exa Networks. All rights reserved.
License: 3-clause BSD. (See the COPYRIGHT file)
"""

import sys
import resource

if sys.platform == 'darwin':
	# darwin returns bytes
	DIVISOR = 1024.0*1024.0
else:
	# other OS (AFAIK) return a number of pages
	DIVISOR = 1024.0*1024.0/resource.getpagesize()


def usage (label='usage'):
	rusage = resource.getrusage(resource.RUSAGE_SELF)
	return '%s: usertime=%s systime=%s mem=%s mb' % (label,rusage.ru_utime,rusage.ru_stime,(rusage.ru_maxrss/DIVISOR))
