Development tree reorganisation

[babeltrace.git] / converter / types.c

diff --git a/converter/types.c b/converter/types.c
new file mode 100644 (file)
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+++ b/converter/types.c
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+/*
+ * Common Trace Format - Converter
+ *
+ * Types registry.
+ *
+ * Copyright (c) 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <ctf/ctf-types.h>
+#include <glib.h>
+#include <errno.h>
+
+struct type_class {
+       GQuark qname;
+       void (*read)();
+       size_t (*write)();
+};
+
+struct type {
+       struct type_class *class;
+       size_t alignment;       /* type alignment, in bits */
+       ssize_t len;            /* type length, in bits. -1 for dynamic size. */
+};
+
+/*
+ * Type class hash table contains the registered type classes. Type class
+ * registration is typically performed by a plugin.
+ * TODO: support plugin unload (unregistration of type classes).
+ */
+GHashTable *type_classes;
+
+struct type_class *ctf_lookup_type_class(GQuark qname)
+{
+       return g_hash_table_lookup(type_classes,
+                                  (gconstpointer) (unsigned long) qname)
+}
+
+int ctf_register_type_class(const char *name,
+                           void (*read)(),
+                           void (*write)())
+{
+       struct type_class tc = g_new(struct type_class, 1);
+       GQuark qname = g_quark_from_string(name);
+
+       if (ctf_lookup_type_class(qname))
+               return -EEXIST;
+
+       g_hash_table_insert(type_classes,
+                           (gconstpointer) (unsigned long) qname,
+                           tc);
+       return 0;
+}
+
+int ctf_init_types(void)
+{
+       type_classes = g_hash_table_new_full(g_direct_hash, g_direct_equal,
+                                            NULL, g_free);
+       if (!type_classes)
+               return -ENOMEM;
+       return 0;
+}
+
+int ctf_finalize_types(void)
+{
+       g_hash_table_destroy(type_classes);
+}