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[GNUnet-SVN] r13577 - in gnunet/src: include util
From: |
gnunet |
Subject: |
[GNUnet-SVN] r13577 - in gnunet/src: include util |
Date: |
Fri, 5 Nov 2010 23:16:16 +0100 |
Author: grothoff
Date: 2010-11-05 23:16:16 +0100 (Fri, 05 Nov 2010)
New Revision: 13577
Modified:
gnunet/src/include/gnunet_plugin_lib.h
gnunet/src/util/plugin.c
Log:
add API to test for plugin's existence
Modified: gnunet/src/include/gnunet_plugin_lib.h
===================================================================
--- gnunet/src/include/gnunet_plugin_lib.h 2010-11-05 22:04:46 UTC (rev
13576)
+++ gnunet/src/include/gnunet_plugin_lib.h 2010-11-05 22:16:16 UTC (rev
13577)
@@ -51,6 +51,17 @@
/**
+ * Test if a plugin exists.
+ *
+ * Note that the library must export a symbol called
+ * "library_name_init" for the test to succeed.
+ *
+ * @param library_name name of the plugin to test if it is installed
+ * @return GNUNET_YES if the plugin exists, GNUNET_NO if not
+ */
+int GNUNET_PLUGIN_test (const char *library_name);
+
+/**
* Setup plugin (runs the "init" callback and returns whatever "init"
* returned). If "init" returns NULL, the plugin is unloaded.
*
Modified: gnunet/src/util/plugin.c
===================================================================
--- gnunet/src/util/plugin.c 2010-11-05 22:04:46 UTC (rev 13576)
+++ gnunet/src/util/plugin.c 2010-11-05 22:16:16 UTC (rev 13577)
@@ -151,7 +151,44 @@
return mptr;
}
+/**
+ * Test if a plugin exists.
+ *
+ * Note that the library must export a symbol called
+ * "library_name_init" for the test to succeed.
+ *
+ * @param library_name name of the plugin to test if it is installed
+ * @return GNUNET_YES if the plugin exists, GNUNET_NO if not
+ */
+int
+GNUNET_PLUGIN_test (const char *library_name)
+{
+ void *libhandle;
+ GNUNET_PLUGIN_Callback init;
+ struct PluginList plug;
+ if (! initialized)
+ {
+ initialized = GNUNET_YES;
+ plugin_init ();
+ }
+ libhandle = lt_dlopenext (library_name);
+ if (libhandle == NULL)
+ return GNUNET_NO;
+ plug.handle = libhandle;
+ plug.name = (char*) library_name;
+ init = resolve_function (&plug, "init");
+ if (init == NULL)
+ {
+ GNUNET_break (0);
+ lt_dlclose (libhandle);
+ return GNUNET_NO;
+ }
+ lt_dlclose (libhandle);
+ return GNUNET_YES;
+}
+
+
/**
* Setup plugin (runs the "init" callback and returns whatever "init"
* returned). If "init" returns NULL, the plugin is unloaded.
@@ -193,6 +230,7 @@
init = resolve_function (plug, "init");
if ((init == NULL) || (NULL == (ret = init (arg))))
{
+ lt_dlclose (libhandle);
GNUNET_free (plug->name);
plugins = plug->next;
GNUNET_free (plug);
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