Call PyEval_InitThreads() when constructing a callback comparator

LevelDB uses a background thread for compaction, and with custom comparators this background thread calls back into Python code, which means the GIL must be initialized. Fixes #35.
wbolster · Aug 26, 2014 · 635777d · 635777d
1 parent cc6c4f1
commit 635777d
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/plyvel/comparator.cpp b/plyvel/comparator.cpp
@@ -22,6 +22,11 @@ class PlyvelCallbackComparator : public leveldb::Comparator
     {
         Py_INCREF(comparator);
         zero = PyLong_FromLong(0);
+
+        /* LevelDB uses a background thread for compaction, and with custom
+         * comparators this background thread calls back into Python code,
+         * which means the GIL must be initialized. */
+        PyEval_InitThreads();
     }
 
     ~PlyvelCallbackComparator()