--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2016 John Spray <john.spray@redhat.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ */
+
+
+// Python.h comes first because otherwise it clobbers ceph's assert
+#include "Python.h"
+
+#include "common/debug.h"
+#include "mgr/Gil.h"
+
+#include "PyModuleRunner.h"
+
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_mgr
+
+
+std::string handle_pyerror();
+
+PyModuleRunner::~PyModuleRunner()
+{
+ Gil gil(pMyThreadState, true);
+
+ if (pClassInstance) {
+ Py_XDECREF(pClassInstance);
+ pClassInstance = nullptr;
+ }
+
+ Py_DECREF(pClass);
+ pClass = nullptr;
+}
+
+int PyModuleRunner::serve()
+{
+ assert(pClassInstance != nullptr);
+
+ // This method is called from a separate OS thread (i.e. a thread not
+ // created by Python), so tell Gil to wrap this in a new thread state.
+ Gil gil(pMyThreadState, true);
+
+ auto pValue = PyObject_CallMethod(pClassInstance,
+ const_cast<char*>("serve"), nullptr);
+
+ int r = 0;
+ if (pValue != NULL) {
+ Py_DECREF(pValue);
+ } else {
+ derr << module_name << ".serve:" << dendl;
+ derr << handle_pyerror() << dendl;
+ return -EINVAL;
+ }
+
+ return r;
+}
+
+void PyModuleRunner::shutdown()
+{
+ assert(pClassInstance != nullptr);
+
+ Gil gil(pMyThreadState, true);
+
+ auto pValue = PyObject_CallMethod(pClassInstance,
+ const_cast<char*>("shutdown"), nullptr);
+
+ if (pValue != NULL) {
+ Py_DECREF(pValue);
+ } else {
+ derr << "Failed to invoke shutdown() on " << module_name << dendl;
+ derr << handle_pyerror() << dendl;
+ }
+}
+
+void PyModuleRunner::log(int level, const std::string &record)
+{
+#undef dout_prefix
+#define dout_prefix *_dout << "mgr[" << module_name << "] "
+ dout(level) << record << dendl;
+#undef dout_prefix
+#define dout_prefix *_dout << "mgr " << __func__ << " "
+}
+
+void* PyModuleRunner::PyModuleRunnerThread::entry()
+{
+ // No need to acquire the GIL here; the module does it.
+ dout(4) << "Entering thread for " << mod->get_name() << dendl;
+ mod->serve();
+ return nullptr;
+}