[projects/pld-builder.new.git] / PLD_Builder / lock.py

# vi: encoding=utf-8 ts=8 sts=4 sw=4 et

import fcntl

import path

locks_list = []

def lock(n, non_block = 0):
    f = open(path.lock_dir + '/' + n, "a")
    # blah, otherwise it gets garbage collected and doesn't work
    locks_list.append(f)
    if non_block:
        try:
            fcntl.flock(f, fcntl.LOCK_EX | fcntl.LOCK_NB)
        except:
            f.close()
            return None
    else:
        fcntl.flock(f, fcntl.LOCK_EX)
    return f
Commit	Line	Data
dfff8bd5 MM	1	# vi: encoding=utf-8 ts=8 sts=4 sw=4 et
dfff8bd5 MM	2
57b6e61d MM	3	import fcntl
	4
	5	import path
	6
9a8908ac MM	7	locks_list = []
9a8908ac MM	8
4d9b6f71	9	def lock(n, non_block = 0):
9be34149	10	f = open(path.lock_dir + '/' + n, "a")
dfff8bd5 MM	11	# blah, otherwise it gets garbage collected and doesn't work
	12	locks_list.append(f)
	13	if non_block:
	14	try:
	15	fcntl.flock(f, fcntl.LOCK_EX \| fcntl.LOCK_NB)
	16	except:
	17	f.close()
	18	return None
	19	else:
	20	fcntl.flock(f, fcntl.LOCK_EX)
	21	return f