From e8286084e9400ae634f06e9da34e4de474b51eb7 Mon Sep 17 00:00:00 2001
From: Daniele Varrazzo <daniele.varrazzo@gmail.com>
Date: Wed, 7 Apr 2010 23:52:53 +0100
Subject: [PATCH] Free the GIL in blocking operations in V2 COPY FROM.

---
 psycopg/pqpath.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/psycopg/pqpath.c b/psycopg/pqpath.c
index 71628301..ee132ab6 100644
--- a/psycopg/pqpath.c
+++ b/psycopg/pqpath.c
@@ -1065,13 +1065,18 @@ _pq_copy_in(cursorObject *curs)
         o = PyObject_CallFunction(func, NULL);
         if (o == NULL) goto clear;
         if (o == Py_None || PyString_GET_SIZE(o) == 0) break;
+        Py_BEGIN_ALLOW_THREADS;
         rv = PQputline(curs->conn->pgconn, PyString_AS_STRING(o));
+        Py_END_ALLOW_THREADS;
         Py_DECREF(o);
         if (0 != rv) goto clear;
     }
     Py_XDECREF(o);
+
+    Py_BEGIN_ALLOW_THREADS;
     PQputline(curs->conn->pgconn, "\\.\n");
     PQendcopy(curs->conn->pgconn);
+    Py_END_ALLOW_THREADS;
 
     /* if for some reason we're using a protocol 3 libpq to connect to a
        protocol 2 backend we still need to cycle on the result set */