Могиленец Виктор, Севастополь SemClass 15323			Майстер Михаил (Севастополь) SemClass 15005
f	1	from collections import deque	f	1	from collections import deque
	2			2
	3	class Lock:		3	class Lock:
	4	busy = {}		4	busy = {}
	5	sems = {}		5	sems = {}
	6			6
	7	def __init__(self, par):		7	def __init__(self, par):
	8	self.par = par		8	self.par = par
	9	self._lock = None		9	self._lock = None
	10	self.sem = None		10	self.sem = None
	11			11
	12	def __str__(self):		12	def __str__(self):
	13	return str(self.par)		13	return str(self.par)
	14			14
	15	@property		15	@property
	16	def lock(self):		16	def lock(self):
	17	if self.sem not in Lock.busy:		17	if self.sem not in Lock.busy:
	18	for k, v in Lock.sems.items():		18	for k, v in Lock.sems.items():
	19	if self.par in v:		19	if self.par in v:
	20	self._lock = self.sem		20	self._lock = self.sem
	21	Lock.busy[self.sem] = self.par		21	Lock.busy[self.sem] = self.par
n	22	elif self.par != Lock.busy[self.sem]:	n	22	elif self.par == Lock.busy[self.sem]:
				23	pass
				24	else:
	23	self._lock = None		25	self._lock = None
	24	return self._lock		26	return self._lock
	25			27
	26	@lock.setter		28	@lock.setter
	27	def lock(self, value):		29	def lock(self, value):
n	28	busy = Lock.busy.items()	n	30	tmp = Lock.busy.items()
	29	for k, v in busy:		31	for k, v in tmp:
	30	if self.par == v:		32	if self.par == v:
	31	del Lock.busy[k]		33	del Lock.busy[k]
	32	break		34	break
	33	for k, v in Lock.sems.items():		35	for k, v in Lock.sems.items():
	34	if self.par in v:		36	if self.par in v:
	35	Lock.sems[k].remove(self.par)		37	Lock.sems[k].remove(self.par)
	36	break		38	break
	37	self.sem = value		39	self.sem = value
	38	try:		40	try:
	39	Lock.sems[value].append(self.par)		41	Lock.sems[value].append(self.par)
	40	except:		42	except:
	41	Lock.sems[value] = deque([self.par])		43	Lock.sems[value] = deque([self.par])
	42			44
	43	@lock.deleter		45	@lock.deleter
	44	def lock(self):		46	def lock(self):
n	45	busy = Lock.busy.items()	n	47	tmp = Lock.busy.items()
	46	for k, v in busy:		48	for k, v in tmp:
	47	if self.par == v:		49	if self.par == v:
	48	del Lock.busy[k]		50	del Lock.busy[k]
	49	break		51	break
	50	for k, v in Lock.sems.items():		52	for k, v in Lock.sems.items():
	51	if v:		53	if v:
	52	if self.par == v[0]:		54	if self.par == v[0]:
	53	Lock.sems[k].popleft()		55	Lock.sems[k].popleft()
	54			56
	55	def __del__(self):		57	def __del__(self):
n	56	busy = Lock.busy.items()	n	58	tmp = Lock.busy.items()
	57	for k, v in busy:		59	for k, v in tmp:
	58	if self.par == v:		60	if self.par == v:
	59	del Lock.busy[k]		61	del Lock.busy[k]
	60	break		62	break
	61	for k, v in Lock.sems.items():		63	for k, v in Lock.sems.items():
	62	if self.par in v:		64	if self.par in v:
	63	Lock.sems[k].remove(self.par)		65	Lock.sems[k].remove(self.par)
	64			66
	65	def locked(self):		67	def locked(self):
t			t	68
				69	class locked_class(Lock):
				70	pass
	66	return Lock		71	return locked_class

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