Handle race condition for directory creation.

theano/gof/cutils.py

+import errno
 import os
 import sys
 
@@ -248,7 +249,11 @@ fail:
 
     loc = os.path.join(config.compiledir, 'cutils_ext')
     if not os.path.exists(loc):
-        os.mkdir(loc)
+        try:
+            os.mkdir(loc)
+        except OSError, e:
+            assert e.errno == errno.EEXIST
+            assert os.path.exists(loc), loc
 
     args = cmodule.GCC_compiler.compile_args()
     cmodule.GCC_compiler.compile_str('cutils_ext', code, location=loc,
@@ -264,7 +269,11 @@ try:
     sys.path.insert(0, config.compiledir)
     location = os.path.join(config.compiledir, 'cutils_ext')
     if not os.path.exists(location):
-        os.mkdir(location)
+        try:
+            os.mkdir(location)
+        except OSError, e:
+            assert e.errno == errno.EEXIST
+            assert os.path.exists(location), location
     if not os.path.exists(os.path.join(location, '__init__.py')):
         open(os.path.join(location, '__init__.py'), 'w').close()
 

theano/gof/lazylinker_c.py

@@ -80,7 +80,12 @@ except ImportError:
             code = open(cfile).read()
             loc = os.path.join(config.compiledir, dirname)
             if not os.path.exists(loc):
-                os.mkdir(loc)
+                try:
+                    os.mkdir(loc)
+                except OSError, e:
+                    assert e.errno == errno.EEXIST
+                    assert os.path.exists(loc)
+
             args = cmodule.GCC_compiler.compile_args()
             cmodule.GCC_compiler.compile_str(dirname, code, location=loc,
                                              preargs=args)

theano/scan_module/scan_perform_ext.py

+import errno
 import logging
 import os
 import sys
@@ -61,7 +62,12 @@ except ImportError:
             code = open(cfile).read()
             loc = os.path.join(config.compiledir, dirname)
             if not os.path.exists(loc):
-                os.mkdir(loc)
+                try:
+                    os.mkdir(loc)
+                except OSError, e:
+                    assert e.errno == errno.EEXIST
+                    assert os.path.exists(loc)
+
             preargs = ['-fwrapv', '-O2', '-fno-strict-aliasing']
             preargs += cmodule.GCC_compiler.compile_args()
             # Cython 19.1 always use the old NumPy interface.  So we