From a1a9fb7128c935848b17c0ce6586991098a17f07 Mon Sep 17 00:00:00 2001
From: Chris McDonough <chrism@agendaless.com>
Date: Wed, 27 May 2009 04:52:51 +0000
Subject: Merge authchanges branch to trunk.

---
 repoze/bfg/threadlocal.py | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 repoze/bfg/threadlocal.py

(limited to 'repoze/bfg/threadlocal.py')

diff --git a/repoze/bfg/threadlocal.py b/repoze/bfg/threadlocal.py
new file mode 100644
index 000000000..7df4f34f4
--- /dev/null
+++ b/repoze/bfg/threadlocal.py
@@ -0,0 +1,39 @@
+import threading
+from zope.component import getGlobalSiteManager
+
+class ThreadLocalManager(threading.local):
+    def __init__(self, default):
+        self.stack = []
+        self.default = default
+        
+    def push(self, info):
+        self.stack.append(info)
+
+    set = push # b/c
+
+    def pop(self):
+        if self.stack:
+            return self.stack.pop()
+
+    def get(self):
+        try:
+            return self.stack[-1]
+        except IndexError:
+            return self.default()
+
+    def clear(self):
+        self.stack[:] = []
+
+def defaults():
+    defaults = {'request':None}
+    gsm = getGlobalSiteManager()
+    defaults['registry'] = gsm
+    return defaults
+
+manager = ThreadLocalManager(defaults)
+
+def setManager(new_manager): # for unit tests
+    global manager
+    old_manager = manager
+    manager = new_manager
+    return old_manager
-- 
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