initial code repo

[stor4nfv.git] / src / ceph / src / common / PluginRegistry.h

diff --git a/src/ceph/src/common/PluginRegistry.h b/src/ceph/src/common/PluginRegistry.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph distributed storage system
+ *
+ * Copyright (C) 2013,2014 Cloudwatt <libre.licensing@cloudwatt.com>
+ * Copyright (C) 2014 Red Hat <contact@redhat.com>
+ *
+ * Author: Loic Dachary <loic@dachary.org>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ * 
+ */
+
+#ifndef CEPH_COMMON_PLUGINREGISTRY_H
+#define CEPH_COMMON_PLUGINREGISTRY_H
+
+#include "common/Mutex.h"
+
+class CephContext;
+
+extern "C" {
+  const char *__ceph_plugin_version();
+  int __ceph_plugin_init(CephContext *cct,
+                        const std::string& type,
+                        const std::string& name);
+}
+
+namespace ceph {
+
+  class Plugin {
+  public:
+    void *library;
+    CephContext *cct;
+
+    explicit Plugin(CephContext *cct) : library(NULL), cct(cct) {}
+    virtual ~Plugin() {}
+  };
+
+  class PluginRegistry {
+  public:
+    CephContext *cct;
+    Mutex lock;
+    bool loading;
+    bool disable_dlclose;
+    std::map<std::string,std::map<std::string,Plugin*> > plugins;
+
+    explicit PluginRegistry(CephContext *cct);
+    ~PluginRegistry();
+
+    int add(const std::string& type, const std::string& name,
+           Plugin *factory);
+    int remove(const std::string& type, const std::string& name);
+    Plugin *get(const std::string& type, const std::string& name);
+    Plugin *get_with_load(const std::string& type, const std::string& name);
+
+    int load(const std::string& type,
+            const std::string& name);
+    int preload();
+    int preload(const std::string& type);
+  };
+}
+
+#endif