
import logging
import os
import threading
import time


try:
					import warnings
except ImportError:
					_UpperCAmelCase      :				Tuple          = None

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

try:
					import fcntl
except ImportError:
					_UpperCAmelCase      :				int          = None


# Backward compatibility
# ------------------------------------------------
try:
					TimeoutError
except NameError:
					_UpperCAmelCase      :				Optional[int]          = OSError


# Data
# ------------------------------------------------
_UpperCAmelCase      :				int          = [
    "Timeout",
    "BaseFileLock",
    "WindowsFileLock",
    "UnixFileLock",
    "SoftFileLock",
    "FileLock",
]

_UpperCAmelCase      :				List[str]          = "3.0.12"


_UpperCAmelCase      :				str          = None


def    A (      )     ->						Dict:
		'''simple docstring'''

		global _logger
		UpperCamelCase						=  _logger or logging.getLogger(__name__				)
		return _logger


class        lowercase      (	_SCREAMING_SNAKE_CASE     ):



		def __init__(				self       ,   A_ )						->      Tuple:
				"""simple docstring"""
				UpperCamelCase						=  lock_file
				return None



		def __str__(				self )						->      Any:
				"""simple docstring"""
				UpperCamelCase						=  F'''The file lock \'{self.lock_file}\' could not be acquired.'''
				return temp






class        lowercase      :



		def __init__(				self       ,   A_ )						->      str:
				"""simple docstring"""
				UpperCamelCase						=  lock
				return None



		def __enter__(				self )						->      Optional[int]:
				"""simple docstring"""
				return self.lock



		def __exit__(				self       ,   A_       ,   A_       ,   A_ )						->      List[str]:
				"""simple docstring"""
				self.lock.release()
				return None






class        lowercase      :



		def __init__(				self       ,   A_       ,   A_=-1       ,   A_=None )						->      int:
				"""simple docstring"""
				UpperCamelCase						=  max_filename_length if max_filename_length is not None else 255
				# Hash the filename if it's too long
				UpperCamelCase						=  self.hash_filename_if_too_long(A_       ,   A_ )
				# The path to the lock file.
				UpperCamelCase						=  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.
				UpperCamelCase						=  None

				# The default timeout value.
				UpperCamelCase						=  timeout

				# We use this lock primarily for the lock counter.
				UpperCamelCase						=  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.
				UpperCamelCase						=  0
				return None



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



		@property
		def __UpperCamelCase				(				self )						->      List[str]:
				"""simple docstring"""
				return self._timeout



		@timeout.setter
		def __UpperCamelCase				(				self       ,   A_ )						->      int:
				"""simple docstring"""
				UpperCamelCase						=  float(A_ )
				return None



		def __UpperCamelCase				(				self )						->      str:
				"""simple docstring"""
				raise NotImplementedError()



		def __UpperCamelCase				(				self )						->      Union[str, Any]:
				"""simple docstring"""
				raise NotImplementedError()



		@property
		def __UpperCamelCase				(				self )						->      List[str]:
				"""simple docstring"""
				return self._lock_file_fd is not None



		def __UpperCamelCase				(				self       ,   A_=None       ,   A_=0.05 )						->      List[str]:
				"""simple docstring"""
				# Use the default timeout, if no timeout is provided.
				if timeout is None:
						UpperCamelCase						=  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

				UpperCamelCase						=  id(self )
				UpperCamelCase						=  self._lock_file
				UpperCamelCase						=  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(A_ )
				except:  # noqa
						# Something did go wrong, so decrement the counter.
						with self._thread_lock:
								UpperCamelCase						=  max(0       ,   self._lock_counter - 1 )

						raise
				return _Acquire_ReturnProxy(lock=self )



		def __UpperCamelCase				(				self       ,   A_=False )						->      Any:
				"""simple docstring"""
				with self._thread_lock:
						if self.is_locked:
								self._lock_counter -= 1

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

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

				return None



		def __enter__(				self )						->      List[str]:
				"""simple docstring"""
				self.acquire()
				return self



		def __exit__(				self       ,   A_       ,   A_       ,   A_ )						->      Optional[int]:
				"""simple docstring"""
				self.release()
				return None



		def __del__(				self )						->      str:
				"""simple docstring"""
				self.release(force=A_ )
				return None



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






class        lowercase      (	_SCREAMING_SNAKE_CASE     ):



		def __init__(				self       ,   A_       ,   A_=-1       ,   A_=None )						->      List[str]:
				"""simple docstring"""
				from .file_utils import relative_to_absolute_path

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



		def __UpperCamelCase				(				self )						->      int:
				"""simple docstring"""
				UpperCamelCase						=  os.O_RDWR | os.O_CREAT | os.O_TRUNC

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



		def __UpperCamelCase				(				self )						->      List[str]:
				"""simple docstring"""
				UpperCamelCase						=  self._lock_file_fd
				UpperCamelCase						=  None
				msvcrt.locking(A_       ,   msvcrt.LK_UNLCK       ,   1 )
				os.close(A_ )

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






class        lowercase      (	_SCREAMING_SNAKE_CASE     ):



		def __init__(				self       ,   A_       ,   A_=-1       ,   A_=None )						->      Optional[int]:
				"""simple docstring"""
				UpperCamelCase						=  os.statvfs(os.path.dirname(A_ ) ).f_namemax
				super().__init__(A_       ,   timeout=A_       ,   max_filename_length=A_ )



		def __UpperCamelCase				(				self )						->      Dict:
				"""simple docstring"""
				UpperCamelCase						=  os.O_RDWR | os.O_CREAT | os.O_TRUNC
				UpperCamelCase						=  os.open(self._lock_file       ,   A_ )

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



		def __UpperCamelCase				(				self )						->      Optional[Any]:
				"""simple docstring"""
				# 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
				UpperCamelCase						=  self._lock_file_fd
				UpperCamelCase						=  None
				fcntl.flock(A_       ,   fcntl.LOCK_UN )
				os.close(A_ )
				return None






class        lowercase      (	_SCREAMING_SNAKE_CASE     ):



		def __UpperCamelCase				(				self )						->      str:
				"""simple docstring"""
				UpperCamelCase						=  os.O_WRONLY | os.O_CREAT | os.O_EXCL | os.O_TRUNC
				try:
						UpperCamelCase						=  os.open(self._lock_file       ,   A_ )
				except OSError:
						pass
				else:
						UpperCamelCase						=  fd
				return None



		def __UpperCamelCase				(				self )						->      List[str]:
				"""simple docstring"""
				os.close(self._lock_file_fd )
				UpperCamelCase						=  None

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






_UpperCAmelCase      :				str          = None

if msvcrt:
					_UpperCAmelCase      :				Tuple          = WindowsFileLock
elif fcntl:
					_UpperCAmelCase      :				Any          = UnixFileLock
else:
					_UpperCAmelCase      :				int          = SoftFileLock

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


import pytest

import datasets.config
from datasets.utils.info_utils import is_small_dataset


@pytest.mark.parametrize('dataset_size'					, [None, 400 * 2**20, 600 * 2**20]				)
@pytest.mark.parametrize('input_in_memory_max_size'					, ['default', 0, 100 * 2**20, 900 * 2**20]				)
def    A (      lowercase					, lowercase					, lowercase				)     ->						Union[str, Any]:
		'''simple docstring'''

		if input_in_memory_max_size != "default":
				monkeypatch.setattr(datasets.config					, 'IN_MEMORY_MAX_SIZE'					, lowercase				)
		UpperCamelCase						=  datasets.config.IN_MEMORY_MAX_SIZE
		if input_in_memory_max_size == "default":
				assert in_memory_max_size == 0
		else:
				assert in_memory_max_size == input_in_memory_max_size
		if dataset_size and in_memory_max_size:
				UpperCamelCase						=  dataset_size < in_memory_max_size
		else:
				UpperCamelCase						=  False
		UpperCamelCase						=  is_small_dataset(lowercase				)
		assert result == expected
