};
+/**
+ * Have we been initialized?
+ */
+static int initialized;
+
+
/**
* Libtool search path before we started.
*/
/**
* Setup libtool paths.
*/
-void __attribute__ ((constructor)) GNUNET_PLUGIN_init ()
+static void
+plugin_init ()
{
int err;
const char *opath;
char *path;
char *cpath;
-#ifdef MINGW
- InitWinEnv (NULL);
-#endif
-
err = lt_dlinit ();
if (err > 0)
{
{
if (opath != NULL)
{
- cpath = GNUNET_malloc (strlen (path) + strlen (opath) + 4);
- strcpy (cpath, opath);
- strcat (cpath, ":");
- strcat (cpath, path);
+ GNUNET_asprintf (&cpath,
+ "%s:%s",
+ opath,
+ path);
lt_dlsetsearchpath (cpath);
GNUNET_free (path);
GNUNET_free (cpath);
/**
* Shutdown libtool.
*/
-void __attribute__ ((destructor)) GNUNET_PLUGIN_fini ()
+static void
+plugin_fini ()
{
lt_dlsetsearchpath (old_dlsearchpath);
if (old_dlsearchpath != NULL)
GNUNET_free (old_dlsearchpath);
old_dlsearchpath = NULL;
}
-
-#ifdef MINGW
- ShutdownWinEnv ();
-#endif
-
lt_dlexit ();
}
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"
GNUNET_PLUGIN_Callback init;
void *ret;
+ if (! initialized)
+ {
+ initialized = GNUNET_YES;
+ plugin_init ();
+ }
libhandle = lt_dlopenext (library_name);
if (libhandle == NULL)
{
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);
lt_dlclose (pos->handle);
GNUNET_free (pos->name);
GNUNET_free (pos);
+ if (plugins == NULL)
+ {
+ plugin_fini();
+ initialized = GNUNET_NO;
+ }
return ret;
}