add ctf_event_definition pointer to ctf_stream_definition

[babeltrace.git] / formats / ctf / iterator.c

/*
 * ctf/iterator.c
 *
 * Babeltrace Library
 *
 * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation
 *
 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *         Julien Desfossez <julien.desfossez@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/babeltrace.h>
#include <babeltrace/format.h>
#include <babeltrace/ctf/events.h>
#include <babeltrace/ctf-ir/metadata.h>
#include <babeltrace/prio_heap.h>
#include <babeltrace/iterator-internal.h>
#include <babeltrace/ctf/events-internal.h>
#include <babeltrace/ctf/metadata.h>
#include <glib.h>

#include "events-private.h"

struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx,
		const struct bt_iter_pos *begin_pos,
		const struct bt_iter_pos *end_pos)
{
	struct bt_ctf_iter *iter;
	int ret;

	iter = g_new0(struct bt_ctf_iter, 1);
	ret = bt_iter_init(&iter->parent, ctx, begin_pos, end_pos);
	if (ret) {
		g_free(iter);
		return NULL;
	}
	iter->callbacks = g_array_new(0, 1, sizeof(struct bt_stream_callbacks));
	iter->recalculate_dep_graph = 0;
	iter->main_callbacks.callback = NULL;
	iter->dep_gc = g_ptr_array_new();
	return iter;
}

void bt_ctf_iter_destroy(struct bt_ctf_iter *iter)
{
	struct bt_stream_callbacks *bt_stream_cb;
	struct bt_callback_chain *bt_chain;
	int i, j;

	/* free all events callbacks */
	if (iter->main_callbacks.callback)
		g_array_free(iter->main_callbacks.callback, TRUE);

	/* free per-event callbacks */
	for (i = 0; i < iter->callbacks->len; i++) {
		bt_stream_cb = &g_array_index(iter->callbacks,
				struct bt_stream_callbacks, i);
		if (!bt_stream_cb || !bt_stream_cb->per_id_callbacks)
			continue;
		for (j = 0; j < bt_stream_cb->per_id_callbacks->len; j++) {
			bt_chain = &g_array_index(bt_stream_cb->per_id_callbacks,
					struct bt_callback_chain, j);
			if (bt_chain->callback) {
				g_array_free(bt_chain->callback, TRUE);
			}
		}
		g_array_free(bt_stream_cb->per_id_callbacks, TRUE);
	}

	bt_iter_fini(&iter->parent);
	g_free(iter);
}

struct bt_iter *bt_ctf_get_iter(struct bt_ctf_iter *iter)
{
	return &iter->parent;
}

struct bt_ctf_event *bt_ctf_iter_read_event(struct bt_ctf_iter *iter)
{
	struct ctf_file_stream *file_stream;
	struct bt_ctf_event *ret = &iter->current_ctf_event;

	file_stream = heap_maximum(iter->parent.stream_heap);
	if (!file_stream) {
		/* end of file for all streams */
		goto stop;
	}
	ret->stream = &file_stream->parent;
	ret->event = g_ptr_array_index(ret->stream->events_by_id,
			ret->stream->event_id);

	if (ret->stream->stream_id > iter->callbacks->len)
		goto end;

	process_callbacks(iter, ret->stream);

end:
	return ret;
stop:
	return NULL;
}