From e2ca483507b5374bccdd88879f1fbfc52f3dd957 Mon Sep 17 00:00:00 2001
From: Michael Davidsaver <mdavidsaver@gmail.com>
Date: Wed, 5 Jun 2019 12:04:00 +0200
Subject: [PATCH] avoid deadlock between GIL and scan locks

---
 devsupApp/src/dbrec.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/devsupApp/src/dbrec.c b/devsupApp/src/dbrec.c
index e85b5e4..7802fe5 100644
--- a/devsupApp/src/dbrec.c
+++ b/devsupApp/src/dbrec.c
@@ -272,7 +272,9 @@ static PyObject *pyRecord_asyncFinish(pyRecord *self, PyObject *args, PyObject *
 
 static PyObject *pyRecord_enter(pyRecord *self)
 {
-    dbScanLock(self->entry.precnode->precord);
+    Py_BEGIN_ALLOW_THREADS {
+        dbScanLock(self->entry.precnode->precord);
+    } Py_END_ALLOW_THREADS
 
     Py_INCREF(self);
     return (PyObject*)self;
@@ -282,8 +284,10 @@ static PyObject *pyRecord_exit(pyRecord *self, PyObject *args)
 {
     PyObject *t, *v, *tb;
 
-    /* always unlock, regardless of arguments */
-    dbScanUnlock(self->entry.precnode->precord);
+    Py_BEGIN_ALLOW_THREADS {
+        /* always unlock, regardless of arguments */
+        dbScanUnlock(self->entry.precnode->precord);
+    } Py_END_ALLOW_THREADS
 
     if(!PyArg_ParseTuple(args, "OOO", &t, &v, &tb))
         return NULL;