From bb9bdf7e5b5cb0d3458242c5b8ba6134efb282a4 Mon Sep 17 00:00:00 2001
From: Miro Hron?ok <miro@hroncok.cz>
Date: Fri, 8 Jun 2018 18:49:42 +0200
Subject: Don't raise StopIteration from generator, return instead

See https://www.python.org/dev/peps/pep-0479/
---
 paste/util/killthread.py | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 paste/util/killthread.py

(limited to 'paste/util/killthread.py')

diff --git a/paste/util/killthread.py b/paste/util/killthread.py
new file mode 100644
index 0000000..4df4f42
--- /dev/null
+++ b/paste/util/killthread.py
@@ -0,0 +1,30 @@
+"""
+Kill a thread, from http://sebulba.wikispaces.com/recipe+thread2
+"""
+import six
+try:
+    import ctypes
+except ImportError:
+    raise ImportError(
+        "You cannot use paste.util.killthread without ctypes installed")
+if not hasattr(ctypes, 'pythonapi'):
+    raise ImportError(
+        "You cannot use paste.util.killthread without ctypes.pythonapi")
+
+def async_raise(tid, exctype):
+    """raises the exception, performs cleanup if needed.
+
+    tid is the value given by thread.get_ident() (an integer).
+    Raise SystemExit to kill a thread."""
+    if not isinstance(exctype, (six.class_types, type)):
+        raise TypeError("Only types can be raised (not instances)")
+    if not isinstance(tid, int):
+        raise TypeError("tid must be an integer")
+    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(ctypes.c_long(tid), ctypes.py_object(exctype))
+    if res == 0:
+        raise ValueError("invalid thread id")
+    elif res != 1:
+        # """if it returns a number greater than one, you're in trouble,
+        # and you should call it again with exc=NULL to revert the effect"""
+        ctypes.pythonapi.PyThreadState_SetAsyncExc(ctypes.c_long(tid), 0)
+        raise SystemError("PyThreadState_SetAsyncExc failed")
-- 
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