


import logging
import os
import threading
import time


try:
	import warnings
except ImportError:
	_lowerCAmelCase:						Optional[int]   				=       None

try:
	import msvcrt
except ImportError:
	_lowerCAmelCase:						List[str]   				=       None

try:
	import fcntl
except ImportError:
	_lowerCAmelCase:						Dict   				=       None


# Backward compatibility
# ------------------------------------------------
try:
	TimeoutError
except NameError:
	_lowerCAmelCase:						str   				=       OSError


# Data
# ------------------------------------------------
_lowerCAmelCase:						Optional[Any]   				=       [
    'Timeout',
    'BaseFileLock',
    'WindowsFileLock',
    'UnixFileLock',
    'SoftFileLock',
    'FileLock',
]

_lowerCAmelCase:						List[Any]   				=       '3.0.12'


_lowerCAmelCase:						Any   				=       None






def   _lowercase(					):
							global _logger
							a__      =_logger or logging.getLogger(__name__     )
							return _logger




class       lowercase_					(lowercase__   ):





				def __init__(				self       ,  lowercase_)  -> Dict:
											a__      =lock_file
											return None





				def __str__(				self)  -> Tuple:
											a__      =F"""The file lock '{self.lock_file}' could not be acquired."""
											return temp







class       lowercase_					:





				def __init__(				self       ,  lowercase_)  -> Union[str, Any]:
											a__      =lock
											return None





				def __enter__(				self)  -> Dict:
											return self.lock





				def __exit__(				self       ,  lowercase_       ,  lowercase_       ,  lowercase_)  -> int:
											self.lock.release()
											return None







class       lowercase_					:





				def __init__(				self       ,  lowercase_       ,  lowercase_=-1       ,  lowercase_=None)  -> Any:
											a__      =max_filename_length if max_filename_length is not None else 255
											# Hash the filename if it's too long
											a__      =self.hash_filename_if_too_long(lowercase_       ,  lowercase_)
											# The path to the lock file.
											a__      =lock_file

											# The file descriptor for the *_lock_file* as it is returned by the
											# os.open() function.
											# This file lock is only NOT None, if the object currently holds the
											# lock.
											a__      =None

											# The default timeout value.
											a__      =timeout

											# We use this lock primarily for the lock counter.
											a__      =threading.Lock()

											# The lock counter is used for implementing the nested locking
											# mechanism. Whenever the lock is acquired, the counter is increased and
											# the lock is only released, when this value is 0 again.
											a__      =0
											return None





				@property
				def 						__UpperCamelCase    (				self)  -> str:
											return self._lock_file





				@property
				def 						__UpperCamelCase    (				self)  -> Optional[int]:
											return self._timeout





				@timeout.setter
				def 						__UpperCamelCase    (				self       ,  lowercase_)  -> List[str]:
											a__      =float(lowercase_)
											return None





				def 						__UpperCamelCase    (				self)  -> Tuple:
											raise NotImplementedError()





				def 						__UpperCamelCase    (				self)  -> Dict:
											raise NotImplementedError()





				@property
				def 						__UpperCamelCase    (				self)  -> int:
											return self._lock_file_fd is not None





				def 						__UpperCamelCase    (				self       ,  lowercase_=None       ,  lowercase_=0.05)  -> List[str]:
											# Use the default timeout, if no timeout is provided.
											if timeout is None:
																		a__      =self.timeout

											# Increment the number right at the beginning.
											# We can still undo it, if something fails.
											with self._thread_lock:
																		self._lock_counter += 1

											a__      =id(self)
											a__      =self._lock_file
											a__      =time.time()
											try:
																		while True:
																									with self._thread_lock:
																																if not self.is_locked:
																																							logger().debug(F"""Attempting to acquire lock {lock_id} on {lock_filename}""")
																																							self._acquire()

																									if self.is_locked:
																																logger().debug(F"""Lock {lock_id} acquired on {lock_filename}""")
																																break
																									elif timeout >= 0 and time.time() - start_time > timeout:
																																logger().debug(F"""Timeout on acquiring lock {lock_id} on {lock_filename}""")
																																raise Timeout(self._lock_file)
																									else:
																																logger().debug(
																																    F"""Lock {lock_id} not acquired on {lock_filename}, waiting {poll_intervall} seconds ...""")
																																time.sleep(lowercase_)
											except:  # noqa
																		# Something did go wrong, so decrement the counter.
																		with self._thread_lock:
																									a__      =max(0       ,  self._lock_counter - 1)

																		raise
											return _Acquire_ReturnProxy(lock=self)





				def 						__UpperCamelCase    (				self       ,  lowercase_=False)  -> Optional[Any]:
											with self._thread_lock:
																		if self.is_locked:
																									self._lock_counter -= 1

																									if self._lock_counter == 0 or force:
																																a__      =id(self)
																																a__      =self._lock_file

																																logger().debug(F"""Attempting to release lock {lock_id} on {lock_filename}""")
																																self._release()
																																a__      =0
																																logger().debug(F"""Lock {lock_id} released on {lock_filename}""")

											return None





				def __enter__(				self)  -> str:
											self.acquire()
											return self





				def __exit__(				self       ,  lowercase_       ,  lowercase_       ,  lowercase_)  -> List[str]:
											self.release()
											return None





				def __del__(				self)  -> List[str]:
											self.release(force=lowercase_)
											return None





				def 						__UpperCamelCase    (				self       ,  lowercase_       ,  lowercase_)  -> str:
											a__      =os.path.basename(lowercase_)
											if len(lowercase_) > max_length and max_length > 0:
																		a__      =os.path.dirname(lowercase_)
																		a__      =str(hash(lowercase_))
																		a__      =filename[: max_length - len(lowercase_) - 8] + '...' + hashed_filename + '.lock'
																		return os.path.join(lowercase_       ,  lowercase_)
											else:
																		return path







class       lowercase_					(lowercase__   ):





				def __init__(				self       ,  lowercase_       ,  lowercase_=-1       ,  lowercase_=None)  -> Dict:
											from .file_utils import relative_to_absolute_path

											super().__init__(lowercase_       ,  timeout=lowercase_       ,  max_filename_length=lowercase_)
											a__      ='\\\\?\\' + relative_to_absolute_path(self.lock_file)





				def 						__UpperCamelCase    (				self)  -> Tuple:
											a__      =os.O_RDWR | os.O_CREAT | os.O_TRUNC

											try:
																		a__      =os.open(self._lock_file       ,  lowercase_)
											except OSError:
																		pass
											else:
																		try:
																									msvcrt.locking(lowercase_       ,  msvcrt.LK_NBLCK       ,  1)
																		except OSError:
																									os.close(lowercase_)
																		else:
																									a__      =fd
											return None





				def 						__UpperCamelCase    (				self)  -> List[Any]:
											a__      =self._lock_file_fd
											a__      =None
											msvcrt.locking(lowercase_       ,  msvcrt.LK_UNLCK       ,  1)
											os.close(lowercase_)

											try:
																		os.remove(self._lock_file)
											# Probably another instance of the application
											# that acquired the file lock.
											except OSError:
																		pass
											return None







class       lowercase_					(lowercase__   ):





				def __init__(				self       ,  lowercase_       ,  lowercase_=-1       ,  lowercase_=None)  -> Union[str, Any]:
											a__      =os.statvfs(os.path.dirname(lowercase_)).f_namemax
											super().__init__(lowercase_       ,  timeout=lowercase_       ,  max_filename_length=lowercase_)





				def 						__UpperCamelCase    (				self)  -> List[Any]:
											a__      =os.O_RDWR | os.O_CREAT | os.O_TRUNC
											a__      =os.open(self._lock_file       ,  lowercase_)

											try:
																		fcntl.flock(lowercase_       ,  fcntl.LOCK_EX | fcntl.LOCK_NB)
											except OSError:
																		os.close(lowercase_)
											else:
																		a__      =fd
											return None





				def 						__UpperCamelCase    (				self)  -> Union[str, Any]:
											# Do not remove the lockfile:
											#
											#   https://github.com/benediktschmitt/py-filelock/issues/31
											#   https://stackoverflow.com/questions/17708885/flock-removing-locked-file-without-race-condition
											a__      =self._lock_file_fd
											a__      =None
											fcntl.flock(lowercase_       ,  fcntl.LOCK_UN)
											os.close(lowercase_)
											return None







class       lowercase_					(lowercase__   ):





				def 						__UpperCamelCase    (				self)  -> List[Any]:
											a__      =os.O_WRONLY | os.O_CREAT | os.O_EXCL | os.O_TRUNC
											try:
																		a__      =os.open(self._lock_file       ,  lowercase_)
											except OSError:
																		pass
											else:
																		a__      =fd
											return None





				def 						__UpperCamelCase    (				self)  -> List[str]:
											os.close(self._lock_file_fd)
											a__      =None

											try:
																		os.remove(self._lock_file)
											# The file is already deleted and that's what we want.
											except OSError:
																		pass
											return None







_lowerCAmelCase:						Any   				=       None

if msvcrt:
	_lowerCAmelCase:						int   				=       WindowsFileLock
elif fcntl:
	_lowerCAmelCase:						List[str]   				=       UnixFileLock
else:
	_lowerCAmelCase:						List[str]   				=       SoftFileLock

	if warnings is not None:
		warnings.warn('only soft file lock is available')





import unittest

from transformers import is_torch_available
from transformers.testing_utils import require_sentencepiece, require_tokenizers, require_torch, slow, torch_device


if is_torch_available():
	from transformers import AutoModelForSeqaSeqLM, AutoTokenizer




@require_torch
@require_sentencepiece
@require_tokenizers
class       lowercase_					(unittest.TestCase   ):





				@slow
				def 						__UpperCamelCase    (				self)  -> Optional[int]:
											a__      =AutoModelForSeqaSeqLM.from_pretrained('google/mt5-small'       ,  return_dict=lowercase_).to(lowercase_)
											a__      =AutoTokenizer.from_pretrained('google/mt5-small')

											a__      =tokenizer('Hello there'       ,  return_tensors='pt').input_ids
											a__      =tokenizer('Hi I am'       ,  return_tensors='pt').input_ids

											a__      =model(input_ids.to(lowercase_)       ,  labels=labels.to(lowercase_)).loss
											a__      =-(labels.shape[-1] * loss.item())

											a__      =-84.91_27
											self.assertTrue(abs(mtf_score - EXPECTED_SCORE) < 1e-4)

