Source code for soma.safemkdir

# -*- coding: utf-8 -*-

#  This software and supporting documentation are distributed by
#      Institut Federatif de Recherche 49
#      CEA/NeuroSpin, Batiment 145,
#      91191 Gif-sur-Yvette cedex
#      France
#
# This software is governed by the CeCILL-B license under
# French law and abiding by the rules of distribution of free software.
# You can  use, modify and/or redistribute the software under the
# terms of the CeCILL-B license as circulated by CEA, CNRS
# and INRIA at the following URL "http://www.cecill.info".
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from __future__ import absolute_import
import os
import errno


def mkdir(dirname, mode=0o777):
    '''Same as os.mkdir, but try to prevent errors occurring from concurrent creation by several threads/processes.
    '''
    try:
        os.mkdir(dirname, mode)
    except OSError as e:
        if e.errno != errno.EEXIST:
            raise  # real error
        # ignore EEXIST, job has already been done


def makedirs(dirname, mode=0o777):
    '''Same as os.makedirs, but try to prevent errors occurring from concurrent creation by several threads/processes.
    '''
    ok = False
    while not ok:
        try:
            os.makedirs(dirname, mode)
            ok = True
        except OSError as e:
            if e.errno != errno.EEXIST:
                raise  # real error
            # ignore EEXIST, job has already at least partially been done
            if os.path.exists(dirname):
                # completely done: OK
                ok = True
            # otherwise try again.