X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=lib%2Fregistry.c;fp=lib%2Fregistry.c;h=829ede9da77bf12dce5da544e3ea0bb3538a8049;hb=e419579102094d83539d79ce6af83d9786d387ee;hp=0000000000000000000000000000000000000000;hpb=5c5facc70af60670ec8f53b9d90d13722a8477f4;p=babeltrace.git

diff --git a/lib/registry.c b/lib/registry.c
new file mode 100644
index 00000000..829ede9d
--- /dev/null
+++ b/lib/registry.c
@@ -0,0 +1,102 @@
+/*
+ * BabelTrace
+ *
+ * Format Registry
+ *
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
+ *
+ * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+
+#include <babeltrace/format.h>
+#include <glib.h>
+#include <errno.h>
+#include <stdio.h>
+#include <assert.h>
+
+struct walk_data {
+	FILE *fp;
+	int iter;
+};
+
+static int init_done;
+void __attribute__((constructor)) format_init(void);
+void __attribute__((destructor)) format_finalize(void);
+
+/*
+ * Format registry hash table contains the registered formats. Format
+ * registration is typically performed by a format plugin.
+ * TODO: support plugin unload (unregistration of formats).
+ */
+GHashTable *format_registry;
+
+struct format *bt_lookup_format(bt_intern_str name)
+{
+	if (!init_done)
+		return NULL;
+	return g_hash_table_lookup(format_registry,
+				   (gconstpointer) (unsigned long) name);
+}
+
+static void show_format(gpointer key, gpointer value, gpointer user_data)
+{
+	struct walk_data *data = user_data;
+
+	fprintf(data->fp, "%s%s", data->iter ? ", " : "",
+		g_quark_to_string((GQuark) (unsigned long) key));
+	data->iter++;
+}
+
+void bt_fprintf_format_list(FILE *fp)
+{
+	struct walk_data data;
+
+	data.fp = fp;
+	data.iter = 0;
+
+	fprintf(fp, "Formats available: ");
+	if (!init_done)
+		return;
+	g_hash_table_foreach(format_registry, show_format, &data);
+	if (data.iter == 0)
+		fprintf(fp, "<none>");
+	fprintf(fp, ".\n");
+}
+
+int bt_register_format(struct format *format)
+{
+	if (!init_done)
+		format_init();
+
+	if (bt_lookup_format(format->name))
+		return -EEXIST;
+
+	g_hash_table_insert(format_registry,
+			    (gpointer) (unsigned long) format->name,
+			    format);
+	return 0;
+}
+
+void format_init(void)
+{
+	if (init_done)
+		return;
+	format_registry = g_hash_table_new(g_direct_hash, g_direct_equal);
+	assert(format_registry);
+	init_done = 1;
+}
+
+void format_finalize(void)
+{
+	g_hash_table_destroy(format_registry);
+}