initial code repo

[stor4nfv.git] / src / ceph / src / erasure-code / ErasureCodePlugin.h

diff --git a/src/ceph/src/erasure-code/ErasureCodePlugin.h b/src/ceph/src/erasure-code/ErasureCodePlugin.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_ERASURE_CODE_PLUGIN_H
+#define CEPH_ERASURE_CODE_PLUGIN_H
+
+#include "common/Mutex.h"
+#include "ErasureCodeInterface.h"
+
+extern "C" {
+  const char *__erasure_code_version();
+  int __erasure_code_init(char *plugin_name, char *directory);
+}
+
+namespace ceph {
+
+  class ErasureCodePlugin {
+  public:
+    void *library;
+
+    ErasureCodePlugin() :
+      library(0) {}
+    virtual ~ErasureCodePlugin() {}
+
+    virtual int factory(const std::string &directory,
+                       ErasureCodeProfile &profile,
+                        ErasureCodeInterfaceRef *erasure_code,
+                       std::ostream *ss) = 0;
+  };
+
+  class ErasureCodePluginRegistry {
+  public:
+    Mutex lock;
+    bool loading;
+    bool disable_dlclose;
+    std::map<std::string,ErasureCodePlugin*> plugins;
+
+    static ErasureCodePluginRegistry singleton;
+
+    ErasureCodePluginRegistry();
+    ~ErasureCodePluginRegistry();
+
+    static ErasureCodePluginRegistry &instance() {
+      return singleton;
+    }
+
+    int factory(const std::string &plugin,
+               const std::string &directory,
+               ErasureCodeProfile &profile,
+               ErasureCodeInterfaceRef *erasure_code,
+               std::ostream *ss);
+
+    int add(const std::string &name, ErasureCodePlugin *plugin);
+    int remove(const std::string &name);
+    ErasureCodePlugin *get(const std::string &name);
+
+    int load(const std::string &plugin_name,
+            const std::string &directory,
+            ErasureCodePlugin **plugin,
+            std::ostream *ss);
+
+    int preload(const std::string &plugins,
+               const std::string &directory,
+               std::ostream *ss);
+  };
+}
+
+#endif