X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=lib%2Ftypes%2Ftypes.c;h=f6e9317cb1eb33c80534ea382432873551cf35b5;hp=1b9a3dfb5956544310051c6d5090ca045d75ee98;hb=d17081340c79b300d190d39f29447b9002cf0673;hpb=dd617f8ac309ea811019b6be7edc8b700435662b

diff --git a/lib/types/types.c b/lib/types/types.c
index 1b9a3dfb..f6e9317c 100644
--- a/lib/types/types.c
+++ b/lib/types/types.c
@@ -22,8 +22,59 @@
 
 #include <ctf/ctf-types.h>
 #include <glib.h>
+#include <errno.h>
+
+struct type_class {
+	GQuark qname;
+	void (*read)();
+	size_t (*write)();
+};
 
 struct type {
-	GQuark name;
-	size_t len;	/* type length, in bits */
+	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);
+}