Release gil before call C++ function on virtual method.

Fixes bug #423.

Reviewer: Hugo Parente Lima <hugo.pl@gmail.com>
          Luciano Wolf <luciano.wolf@openbossa.org>

2 files changed, 7 insertions, 2 deletions

diff --git a/libshiboken/gilstate.cpp b/libshiboken/gilstate.cpp
index 50a3c6e6e..f49930e1d 100644
--- a/libshiboken/gilstate.cpp
+++ b/libshiboken/gilstate.cpp
@@ -33,10 +33,14 @@ GilState::GilState()
 
 GilState::~GilState()
 {
-    if(Py_IsInitialized())
-        PyGILState_Release(m_gstate);
+    release();
 }
 
+void GilState::release()
+{
+    if(Py_IsInitialized() && m_gstate)
+        PyGILState_Release(m_gstate);
+}
 } // namespace Shiboken
 
 
diff --git a/libshiboken/gilstate.h b/libshiboken/gilstate.h
index efb3cb794..b2f33cb2c 100644
--- a/libshiboken/gilstate.h
+++ b/libshiboken/gilstate.h
@@ -34,6 +34,7 @@ class LIBSHIBOKEN_API GilState
 public:
     GilState();
     ~GilState();
+    void release();
 private:
     PyGILState_STATE m_gstate;
 };