added wrapper for u_cleanup/u_init sequence as ResourceBundle.resetICU()

common.h

@@ -169,6 +169,7 @@ typedef intintobjargproc ssizessizeobjargproc;
 #include <unicode/ucasemap.h>
 #include <unicode/udata.h>
 #include <unicode/ubidi.h>
+#include <unicode/uclean.h>
 
 #define VERSION_HEX(major, minor, patch) \
   (((major) << 24) | ((minor) << 16) | ((patch) << 8))

locale.cpp

@@ -248,6 +248,7 @@ static PyObject *t_resourcebundle_getIntVector(t_resourcebundle *self);
 static PyObject *t_resourcebundle_getLocale(t_resourcebundle *self,
                                             PyObject *args);
 
+static PyObject *t_resourcebundle_resetICU(PyTypeObject *type);
 #ifndef PYPY_VERSION
 static PyObject *t_resourcebundle_setAppData(PyTypeObject *type,
                                              PyObject *args);
@@ -272,6 +273,7 @@ static PyMethodDef t_resourcebundle_methods[] = {
     DECLARE_METHOD(t_resourcebundle, getBinary, METH_NOARGS),
     DECLARE_METHOD(t_resourcebundle, getIntVector, METH_NOARGS),
     DECLARE_METHOD(t_resourcebundle, getLocale, METH_VARARGS),
+    DECLARE_METHOD(t_resourcebundle, resetICU, METH_CLASS | METH_NOARGS),
 #ifndef PYPY_VERSION
     DECLARE_METHOD(t_resourcebundle, setAppData, METH_CLASS | METH_VARARGS),
 #endif
@@ -1572,6 +1574,17 @@ static PyObject *t_resourcebundle_getLocale(t_resourcebundle *self,
     return PyErr_SetArgsError((PyObject *) self, "getLocale", args);
 }
 
+// Use this with care, see docs for u_cleanup() and u_init() in uclean.h or at
+// https://unicode-org.github.io/icu-docs/apidoc/dev/icu4c/uclean_8h.html
+static PyObject *t_resourcebundle_resetICU(PyTypeObject *type)
+{
+    u_cleanup();
+    STATUS_CALL(u_init(&status));
+
+    Py_RETURN_NONE;
+}
+
+
 #ifndef PYPY_VERSION
 #if defined(_MSC_VER) || defined(__WIN32)