Acquire lock before creation of an empty directory.

That prevents other processes from deleting this dir while it is still empty, before the files are created in it. That problem caused intermittent failure of some tests.

Acquire lock before creation of an empty directory.
1c8a8433 · Pascal Lamblin · a31cfe4a · 1c8a8433
--- a/theano/gof/cmodule.py
+++ b/theano/gof/cmodule.py
@@ -390,6 +390,7 @@ class ModuleCache(object):
            rval = self.module_from_name[name]
        else:
            # we have never seen this key before
+            compilelock.get_lock()
            location = dlimport_workdir(self.dirname)
            #debug("LOCATION*", location)
            try:
@@ -400,6 +401,8 @@ class ModuleCache(object):
                #except Exception, ee:
                    #error('failed to cleanup location', location, ee)
                raise
+            finally:
+                compilelock.release_lock()
            name = module.__file__

            debug("Adding module to cache", key, name)