Fix open/fopen in thread other than main

Before this patch, calling Volume.{f}open in a thread other than main
thread was causing segmentation fault (test included).  The reason is
missing ctypes declarations.

Also, this patch fixes errno handling for these two functions, making
couple of FIXME/TODO notes go away.

Change-Id: Iae9638b7d16cc0e0c587fd21a94be677f2d4af59
Signed-off-by: Oleksiy Syvokon <oleksiy.syvokon@gmail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/test/functional/libgfapi-python-tests.py b/test/functional/libgfapi-python-tests.py
index 13ae54d..87dbfe0 100644
--- a/test/functional/libgfapi-python-tests.py
+++ b/test/functional/libgfapi-python-tests.py
@@ -13,6 +13,7 @@ import unittest
 import os
 import types
 import errno
+import threading
 
 from gluster.gfapi import File, Volume
 from gluster.exceptions import LibgfapiException
@@ -197,6 +198,17 @@ class FileOpsTest(unittest.TestCase):
             f.lseek(0, os.SEEK_SET)
             self.assertEqual(f.read(), data + "hello world")
 
+    def test_fopen_in_thread(self):
+        def gluster_fopen():
+            name = uuid4().hex
+            with self.vol.fopen(name, 'w') as f:
+                f.write('hello world')
+
+        # the following caused segfault before the fix
+        thread = threading.Thread(target=gluster_fopen)
+        thread.start()
+        thread.join()
+
     def test_create_file_already_exists(self):
         try:
             f = File(self.vol.open("newfile", os.O_CREAT))