gras: work on python hooks for props interface

1 files changed, 43 insertions, 0 deletions

diff --git a/python/gras/GRAS_Utils.i b/python/gras/GRAS_Utils.i
new file mode 100644
index 0000000..afe3314
--- /dev/null
+++ b/python/gras/GRAS_Utils.i
@@ -0,0 +1,43 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+////////////////////////////////////////////////////////////////////////
+// Simple class to deal with smart locking/unlocking of python GIL
+////////////////////////////////////////////////////////////////////////
+%{
+
+struct PyGILPhondler
+{
+    PyGILPhondler(void):
+        s(PyGILState_Ensure())
+    {
+        //NOP
+    }
+    ~PyGILPhondler(void)
+    {
+        PyGILState_Release(s);
+    }
+    PyGILState_STATE s;
+};
+
+%}
+
+////////////////////////////////////////////////////////////////////////
+// Simple class to deal with smart save/restore of python thread state
+////////////////////////////////////////////////////////////////////////
+%{
+
+struct PyTSPhondler
+{
+    PyTSPhondler(void):
+        s(PyEval_SaveThread())
+    {
+        //NOP
+    }
+    ~PyTSPhondler(void)
+    {
+        PyEval_RestoreThread(s);
+    }
+    PyThreadState *s;
+};
+
+%}