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diff --git a/lib/babeltrace/ctf/callbacks-internal.h b/lib/babeltrace/ctf/callbacks-internal.h
new file mode 100644
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+++ b/lib/babeltrace/ctf/callbacks-internal.h
@@ -0,0 +1,66 @@
+#ifndef _BABELTRACE_CALLBACKS_INTERNAL_H
+#define _BABELTRACE_CALLBACKS_INTERNAL_H
+
+/*
+ * BabelTrace
+ *
+ * Internal callbacks header
+ *
+ * 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.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <glib.h>
+#include <babeltrace/ctf/events.h>
+
+struct bt_callback {
+	int prio;		/* Callback order priority. Lower first. Dynamically assigned from dependency graph. */
+	void *private_data;
+	int flags;
+	struct bt_dependencies *depends;
+	struct bt_dependencies *weak_depends;
+	struct bt_dependencies *provides;
+	enum bt_cb_ret (*callback)(struct bt_ctf_event *ctf_data,
+				   void *private_data);
+};
+
+struct bt_callback_chain {
+	GArray *callback;	/* Array of struct bt_callback, ordered by priority */
+};
+
+/*
+ * per id callbacks need to be per stream class because event ID vs
+ * event name mapping can vary from stream to stream.
+ */
+struct bt_stream_callbacks {
+	GArray *per_id_callbacks;	/* Array of struct bt_callback_chain */
+};
+
+struct bt_dependencies {
+	GArray *deps;			/* Array of GQuarks */
+	int refcount;			/* free when decremented to 0 */
+};
+
+BT_HIDDEN
+void process_callbacks(struct bt_ctf_iter *iter, struct ctf_stream_definition *stream);
+
+#endif /* _BABELTRACE_CALLBACKS_INTERNAL_H */