[Reproducible-commits] [diffoscope] 15/21: File.guess_file_type: Protect access to mimedb

[Joachim Breitner]

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nomeata pushed a commit to branch pu/parallel2
in repository diffoscope.

commit c4e1e34e523e12a0ea967e8d3ab4b23106cea28b
Author: Joachim Breitner <mail at joachim-breitner.de>
Date:   Thu Dec 3 12:24:28 2015 +0100

    File.guess_file_type: Protect access to mimedb
---
 diffoscope/comparators/binary.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/diffoscope/comparators/binary.py b/diffoscope/comparators/binary.py
index fa1258a..35868e4 100644
--- a/diffoscope/comparators/binary.py
+++ b/diffoscope/comparators/binary.py
@@ -22,6 +22,7 @@ from binascii import hexlify
 from contextlib import contextmanager
 from functools import wraps
 from io import StringIO
+from threading import Lock
 import itertools
 import os
 import os.path
@@ -67,7 +68,11 @@ class File(object, metaclass=ABCMeta):
             if not hasattr(self, '_mimedb'):
                 self._mimedb = magic.open(magic.NONE)
                 self._mimedb.load()
-            return self._mimedb.file(path)
+                self._mimedb_lock = Lock()
+            self._mimedb_lock.acquire()
+            file_type = self._mimedb.file(path)
+            self._mimedb_lock.release()
+            return file_type
 
         @classmethod
         def guess_encoding(self, path):

-- 
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