1 files changed, 146 insertions, 0 deletions
diff --git a/src/stasis/anastasis_db_plugin.c b/src/stasis/anastasis_db_plugin.c
new file mode 100644
index 0000000..6b5332c
--- /dev/null
+++ b/src/stasis/anastasis_db_plugin.c
@@ -0,0 +1,146 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2015, 2016 GNUnet e.V. and INRIA
+
+  TALER 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 3, or (at your option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file merchantdb/merchantdb_plugin.c
+ * @brief Logic to load database plugin
+ * @author Christian Grothoff
+ * @author Sree Harsha Totakura <sreeharsha@totakura.in>
+ */
+#include "platform.h"
+#include "anastasis_database_plugin.h"
+#include <ltdl.h>
+
+
+/**
+ * Initialize the plugin.
+ *
+ * @param cfg configuration to use
+ * @return #GNUNET_OK on success
+ */
+struct ANASTASIS_DatabasePlugin *
+ANASTASIS_DB_plugin_load (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  char *plugin_name;
+  char *lib_name;
+  struct ANASTASIS_DatabasePlugin *plugin;
+
+  if (GNUNET_SYSERR ==
+      GNUNET_CONFIGURATION_get_value_string (cfg,
+                                             "anastasis",
+                                             "db",
+                                             &plugin_name))
+  {
+    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+                               "anastasis",
+                               "db");
+    return NULL;
+  }
+  (void) GNUNET_asprintf (&lib_name,
+                          "libanastasis_plugin_db_%s",
+                          plugin_name);
+  GNUNET_free (plugin_name);
+  plugin = GNUNET_PLUGIN_load (lib_name,
+                               (void *) cfg);
+  if (NULL != plugin)
+    plugin->library_name = lib_name;
+  else
+    lib_name = NULL;
+  return plugin;
+}
+
+
+/**
+ * Shutdown the plugin.
+ *
+ * @param plugin the plugin to unload
+ */
+void
+ANASTASIS_DB_plugin_unload (struct ANASTASIS_DatabasePlugin *plugin)
+{
+  char *lib_name;
+
+  if (NULL == plugin)
+    return;
+  lib_name = plugin->library_name;
+  GNUNET_assert (NULL == GNUNET_PLUGIN_unload (lib_name,
+                                               plugin));
+  GNUNET_free (lib_name);
+}
+
+
+/**
+ * Libtool search path before we started.
+ */
+static char *old_dlsearchpath;
+
+
+/**
+ * Setup libtool paths.
+ */
+void __attribute__ ((constructor))
+plugin_init ()
+{
+  int err;
+  const char *opath;
+  char *path;
+  char *cpath;
+
+  err = lt_dlinit ();
+  if (err > 0)
+  {
+    fprintf (stderr,
+             _ ("Initialization of plugin mechanism failed: %s!\n"),
+             lt_dlerror ());
+    return;
+  }
+  opath = lt_dlgetsearchpath ();
+  if (NULL != opath)
+    old_dlsearchpath = GNUNET_strdup (opath);
+  path = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_LIBDIR);
+  if (NULL != path)
+  {
+    if (NULL != opath)
+    {
+      GNUNET_asprintf (&cpath, "%s:%s", opath, path);
+      lt_dlsetsearchpath (cpath);
+      GNUNET_free (path);
+      GNUNET_free (cpath);
+    }
+    else
+    {
+      lt_dlsetsearchpath (path);
+      GNUNET_free (path);
+    }
+  }
+}
+
+
+/**
+ * Shutdown libtool.
+ */
+void __attribute__ ((destructor))
+plugin_fini ()
+{
+  lt_dlsetsearchpath (old_dlsearchpath);
+  if (NULL != old_dlsearchpath)
+  {
+    GNUNET_free (old_dlsearchpath);
+  }
+  lt_dlexit ();
+}
+
+
+/* end of anastasis_db_plugin.c */