From 1423162ad4c9e5da8eaf9abc736b3eab47096a21 Mon Sep 17 00:00:00 2001
From: Daniel Grunwald <daniel@danielgrunwald.de>
Date: Sat, 27 Jun 2015 19:26:36 +0200
Subject: [PATCH] Call PyEval_InitThreads() in module initializer to ensure
 it's safe to spawn rust threads in the extension module and acquire the GIL
 from those threads.

---
 src/lib.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 28433451..e2f0a4ac 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -210,6 +210,7 @@ pub unsafe fn py_module_initializer_impl(
 ) {
     abort_on_panic!({
         let py = Python::assume_gil_acquired();
+        ffi::PyEval_InitThreads();
         let module = ffi::Py_InitModule(name, ptr::null_mut());
         if module.is_null() { return; }
 
@@ -266,6 +267,7 @@ pub unsafe fn py_module_initializer_impl(
 ) -> *mut ffi::PyObject {
     abort_on_panic!({
         let py = Python::assume_gil_acquired();
+        ffi::PyEval_InitThreads();
         let module = ffi::PyModule_Create(def);
         if module.is_null() { return module; }