From: Guido van Rossum <guido@python.org>
Date: Fri, 24 Aug 2007 04:13:42 +0000 (+0000)
Subject: Make uuid.py thread-safe.  Fix by Yuri Ginsburg.
X-Git-Tag: v3.0a1~300
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=37410aa044fd4ac665a8a8d8031bd0e165515a8e;p=python

Make uuid.py thread-safe.  Fix by Yuri Ginsburg.
---

diff --git a/Lib/uuid.py b/Lib/uuid.py
index c52ffbb6fb..74d4a7a22b 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -414,7 +414,6 @@ def _netbios_getnode():
 _uuid_generate_random = _uuid_generate_time = _UuidCreate = None
 try:
     import ctypes, ctypes.util
-    _buffer = ctypes.create_string_buffer(16)
 
     # The uuid_generate_* routines are provided by libuuid on at least
     # Linux and FreeBSD, and provided by libc on Mac OS X.
@@ -447,11 +446,13 @@ except:
 
 def _unixdll_getnode():
     """Get the hardware address on Unix using ctypes."""
+    _buffer = ctypes.create_string_buffer(16)
     _uuid_generate_time(_buffer)
     return UUID(bytes=bytes_(_buffer.raw)).node
 
 def _windll_getnode():
     """Get the hardware address on Windows using ctypes."""
+    _buffer = ctypes.create_string_buffer(16)
     if _UuidCreate(_buffer) == 0:
         return UUID(bytes=bytes_(_buffer.raw)).node
 
@@ -499,6 +500,7 @@ def uuid1(node=None, clock_seq=None):
 
     # When the system provides a version-1 UUID generator, use it (but don't
     # use UuidCreate here because its UUIDs don't conform to RFC 4122).
+    _buffer = ctypes.create_string_buffer(16)
     if _uuid_generate_time and node is clock_seq is None:
         _uuid_generate_time(_buffer)
         return UUID(bytes=bytes_(_buffer.raw))
@@ -535,6 +537,7 @@ def uuid4():
     """Generate a random UUID."""
 
     # When the system provides a version-4 UUID generator, use it.
+    _buffer = ctypes.create_string_buffer(16)
     if _uuid_generate_random:
         _uuid_generate_random(_buffer)
         return UUID(bytes=bytes_(_buffer.raw))