[babeltrace.git] / lib / graph / notification / event.c

/*
 * Babeltrace Plug-in Event Notification
 *
 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * Author: Jérémie Galarneau <jeremie.galarneau@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.
 */

#define BT_LOG_TAG "NOTIF-EVENT"
#include <babeltrace/lib-logging-internal.h>

#include <babeltrace/compiler-internal.h>
#include <babeltrace/object-internal.h>
#include <babeltrace/ctf-ir/event.h>
#include <babeltrace/ctf-ir/event-internal.h>
#include <babeltrace/ctf-ir/event-class-internal.h>
#include <babeltrace/ctf-ir/stream-class-internal.h>
#include <babeltrace/ctf-ir/trace.h>
#include <babeltrace/graph/graph-internal.h>
#include <babeltrace/graph/notification-event-internal.h>
#include <babeltrace/types.h>
#include <babeltrace/assert-internal.h>
#include <babeltrace/assert-pre-internal.h>
#include <stdbool.h>
#include <inttypes.h>

BT_ASSERT_PRE_FUNC
static inline bool event_class_has_trace(struct bt_event_class *event_class)
{
	struct bt_stream_class *stream_class;

	stream_class = bt_event_class_borrow_stream_class(event_class);
	BT_ASSERT(stream_class);
	return bt_stream_class_borrow_trace(stream_class) != NULL;
}

BT_HIDDEN
struct bt_notification *bt_notification_event_new(struct bt_graph *graph)
{
	struct bt_notification_event *notification = NULL;

	notification = g_new0(struct bt_notification_event, 1);
	if (!notification) {
		BT_LOGE_STR("Failed to allocate one event notification.");
		goto error;
	}

	bt_notification_init(&notification->parent, BT_NOTIFICATION_TYPE_EVENT,
		(bt_object_release_func) bt_notification_event_recycle, graph);
	goto end;

error:
	BT_PUT(notification);

end:
	return (void *) notification;
}

struct bt_notification *bt_notification_event_create(
		struct bt_graph *graph,
		struct bt_event_class *event_class,
		struct bt_packet *packet)
{
	struct bt_notification_event *notification = NULL;
	struct bt_event *event;

	BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
	BT_ASSERT_PRE_NON_NULL(packet, "Packet");
	BT_LOGD("Creating event notification object: "
		"event-class-addr=%p, "
		"event-class-name=\"%s\", event-class-id=%" PRId64,
		event_class,
		bt_event_class_get_name(event_class),
		bt_event_class_get_id(event_class));
	BT_ASSERT_PRE(event_class_has_trace(event_class),
		"Event class is not part of a trace: %!+E", event_class);
	event = bt_event_create(event_class, packet);
	if (unlikely(!event)) {
		BT_LIB_LOGE("Cannot create event from event class: "
			"%![event-class-]+E", event_class);
		goto error;
	}

	/*
	 * Create notification from pool _after_ we have everything
	 * (in this case, a valid event object) so that we never have an
	 * error condition with a non-NULL notification object.
	 * Otherwise:
	 *
	 * * We cannot recycle the notification on error because
	 *   bt_notification_event_recycle() expects a complete
	 *   notification (and the event or clock class priority map
	 *   object could be unset).
	 *
	 * * We cannot destroy the notification because we would need
	 *   to notify the graph (pool owner) so that it removes the
	 *   notification from its notification array.
	 */
	notification = (void *) bt_notification_create_from_pool(
		&graph->event_notif_pool, graph);
	if (unlikely(!notification)) {
		/* bt_notification_create_from_pool() logs errors */
		goto error;
	}

	BT_ASSERT(!notification->event);
	notification->event = event;
	BT_LOGD("Created event notification object: "
		"event-addr=%p, event-class-addr=%p, "
		"event-class-name=\"%s\", event-class-id=%" PRId64 ", "
		"notif-addr=%p",
		notification->event, event_class,
		bt_event_class_get_name(event_class),
		bt_event_class_get_id(event_class),
		notification);
	goto end;

error:
	BT_ASSERT(!notification);
	bt_event_destroy(event);

end:
	return (void *) notification;
}

BT_HIDDEN
void bt_notification_event_destroy(struct bt_notification *notif)
{
	struct bt_notification_event *event_notif = (void *) notif;

	BT_LOGD("Destroying event notification: addr=%p", notif);

	if (event_notif->event) {
		BT_LOGD_STR("Recycling event.");
		bt_event_recycle(event_notif->event);
	}

	g_free(notif);
}

BT_HIDDEN
void bt_notification_event_recycle(struct bt_notification *notif)
{
	struct bt_notification_event *event_notif = (void *) notif;
	struct bt_graph *graph;

	BT_ASSERT(event_notif);

	if (unlikely(!notif->graph)) {
		bt_notification_event_destroy(notif);
		return;
	}

	BT_LOGD("Recycling event notification: addr=%p", notif);
	bt_notification_reset(notif);
	BT_ASSERT(event_notif->event);
	BT_LOGD_STR("Recycling event.");
	bt_event_recycle(event_notif->event);
	event_notif->event = NULL;
	graph = notif->graph;
	notif->graph = NULL;
	bt_object_pool_recycle_object(&graph->event_notif_pool, notif);
}

struct bt_event *bt_notification_event_borrow_event(
		struct bt_notification *notification)
{
	struct bt_notification_event *event_notification;

	BT_ASSERT_PRE_NON_NULL(notification, "Notification");
	BT_ASSERT_PRE_NOTIF_IS_TYPE(notification, BT_NOTIFICATION_TYPE_EVENT);
	event_notification = container_of(notification,
			struct bt_notification_event, parent);
	return event_notification->event;
}
Commit	Line	Data
d51202da JG	1	/*
	2	* Babeltrace Plug-in Event Notification
	3	*
	4	* Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
	5	*
	6	* Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
	7	*
	8	* Permission is hereby granted, free of charge, to any person obtaining a copy
	9	* of this software and associated documentation files (the "Software"), to deal
	10	* in the Software without restriction, including without limitation the rights
	11	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	12	* copies of the Software, and to permit persons to whom the Software is
	13	* furnished to do so, subject to the following conditions:
	14	*
	15	* The above copyright notice and this permission notice shall be included in
	16	* all copies or substantial portions of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	21	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	22	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	23	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	24	* SOFTWARE.
	25	*/
	26
6072db50 PP	27	#define BT_LOG_TAG "NOTIF-EVENT"
	28	#include <babeltrace/lib-logging-internal.h>
	29
3d9990ac	30	#include <babeltrace/compiler-internal.h>
6c677fb5	31	#include <babeltrace/object-internal.h>
599faa1c	32	#include <babeltrace/ctf-ir/event.h>
80f00602	33	#include <babeltrace/ctf-ir/event-internal.h>
d8a36e14 PP	34	#include <babeltrace/ctf-ir/event-class-internal.h>
d8a36e14 PP	35	#include <babeltrace/ctf-ir/stream-class-internal.h>
599faa1c	36	#include <babeltrace/ctf-ir/trace.h>
5c563278	37	#include <babeltrace/graph/graph-internal.h>
b2e0c907	38	#include <babeltrace/graph/notification-event-internal.h>
c55a9f58	39	#include <babeltrace/types.h>
f6ccaed9 PP	40	#include <babeltrace/assert-internal.h>
f6ccaed9 PP	41	#include <babeltrace/assert-pre-internal.h>
a68c0f97	42	#include <stdbool.h>
6072db50	43	#include <inttypes.h>
d51202da	44
f6ccaed9	45	BT_ASSERT_PRE_FUNC
312c056a	46	static inline bool event_class_has_trace(struct bt_event_class *event_class)
a68c0f97	47	{
50842bdc	48	struct bt_stream_class *stream_class;
a68c0f97	49
50842bdc	50	stream_class = bt_event_class_borrow_stream_class(event_class);
f6ccaed9	51	BT_ASSERT(stream_class);
50842bdc	52	return bt_stream_class_borrow_trace(stream_class) != NULL;
a68c0f97 PP	53	}
a68c0f97 PP	54
5c563278 PP	55	BT_HIDDEN
	56	struct bt_notification bt_notification_event_new(struct bt_graph graph)
	57	{
	58	struct bt_notification_event *notification = NULL;
	59
	60	notification = g_new0(struct bt_notification_event, 1);
	61	if (!notification) {
	62	BT_LOGE_STR("Failed to allocate one event notification.");
	63	goto error;
	64	}
	65
	66	bt_notification_init(&notification->parent, BT_NOTIFICATION_TYPE_EVENT,
	67	(bt_object_release_func) bt_notification_event_recycle, graph);
	68	goto end;
	69
	70	error:
	71	BT_PUT(notification);
	72
	73	end:
	74	return (void *) notification;
	75	}
	76
312c056a	77	struct bt_notification *bt_notification_event_create(
5c563278	78	struct bt_graph *graph,
312c056a	79	struct bt_event_class *event_class,
e22b45d0	80	struct bt_packet *packet)
d51202da	81	{
80f00602	82	struct bt_notification_event *notification = NULL;
6c677fb5	83	struct bt_event *event;
6072db50	84
312c056a PP	85	BT_ASSERT_PRE_NON_NULL(event_class, "Event class");
312c056a PP	86	BT_ASSERT_PRE_NON_NULL(packet, "Packet");
6072db50	87	BT_LOGD("Creating event notification object: "
312c056a	88	"event-class-addr=%p, "
e22b45d0	89	"event-class-name=\"%s\", event-class-id=%" PRId64,
312c056a	90	event_class,
50842bdc	91	bt_event_class_get_name(event_class),
e22b45d0	92	bt_event_class_get_id(event_class));
312c056a PP	93	BT_ASSERT_PRE(event_class_has_trace(event_class),
312c056a PP	94	"Event class is not part of a trace: %!+E", event_class);
6c677fb5 PP	95	event = bt_event_create(event_class, packet);
	96	if (unlikely(!event)) {
	97	BT_LIB_LOGE("Cannot create event from event class: "
	98	"%![event-class-]+E", event_class);
24626e8b JG	99	goto error;
24626e8b JG	100	}
6072db50	101
6c677fb5 PP	102	/*
	103	* Create notification from pool _after_ we have everything
	104	* (in this case, a valid event object) so that we never have an
	105	* error condition with a non-NULL notification object.
	106	* Otherwise:
	107	*
	108	* * We cannot recycle the notification on error because
	109	* bt_notification_event_recycle() expects a complete
	110	* notification (and the event or clock class priority map
	111	* object could be unset).
	112	*
	113	* * We cannot destroy the notification because we would need
	114	* to notify the graph (pool owner) so that it removes the
	115	* notification from its notification array.
	116	*/
	117	notification = (void *) bt_notification_create_from_pool(
	118	&graph->event_notif_pool, graph);
	119	if (unlikely(!notification)) {
	120	/* bt_notification_create_from_pool() logs errors */
312c056a PP	121	goto error;
	122	}
	123
6c677fb5 PP	124	BT_ASSERT(!notification->event);
6c677fb5 PP	125	notification->event = event;
6072db50 PP	126	BT_LOGD("Created event notification object: "
	127	"event-addr=%p, event-class-addr=%p, "
	128	"event-class-name=\"%s\", event-class-id=%" PRId64 ", "
e22b45d0	129	"notif-addr=%p",
312c056a	130	notification->event, event_class,
50842bdc	131	bt_event_class_get_name(event_class),
e22b45d0	132	bt_event_class_get_id(event_class),
6072db50	133	notification);
d4629a98	134	goto end;
6072db50	135
d51202da	136	error:
6c677fb5 PP	137	BT_ASSERT(!notification);
6c677fb5 PP	138	bt_event_destroy(event);
d4629a98 PP	139
d4629a98 PP	140	end:
5c563278 PP	141	return (void *) notification;
	142	}
	143
	144	BT_HIDDEN
	145	void bt_notification_event_destroy(struct bt_notification *notif)
	146	{
	147	struct bt_notification_event event_notif = (void ) notif;
	148
	149	BT_LOGD("Destroying event notification: addr=%p", notif);
	150
	151	if (event_notif->event) {
	152	BT_LOGD_STR("Recycling event.");
	153	bt_event_recycle(event_notif->event);
	154	}
	155
5c563278 PP	156	g_free(notif);
	157	}
	158
	159	BT_HIDDEN
	160	void bt_notification_event_recycle(struct bt_notification *notif)
	161	{
	162	struct bt_notification_event event_notif = (void ) notif;
	163	struct bt_graph *graph;
	164
	165	BT_ASSERT(event_notif);
	166
6c677fb5	167	if (unlikely(!notif->graph)) {
5c563278 PP	168	bt_notification_event_destroy(notif);
	169	return;
	170	}
	171
	172	BT_LOGD("Recycling event notification: addr=%p", notif);
	173	bt_notification_reset(notif);
6c677fb5 PP	174	BT_ASSERT(event_notif->event);
	175	BT_LOGD_STR("Recycling event.");
	176	bt_event_recycle(event_notif->event);
	177	event_notif->event = NULL;
5c563278 PP	178	graph = notif->graph;
	179	notif->graph = NULL;
	180	bt_object_pool_recycle_object(&graph->event_notif_pool, notif);
d51202da JG	181	}
d51202da JG	182
094ff7c0	183	struct bt_event *bt_notification_event_borrow_event(
d51202da JG	184	struct bt_notification *notification)
	185	{
	186	struct bt_notification_event *event_notification;
	187
f6ccaed9 PP	188	BT_ASSERT_PRE_NON_NULL(notification, "Notification");
f6ccaed9 PP	189	BT_ASSERT_PRE_NOTIF_IS_TYPE(notification, BT_NOTIFICATION_TYPE_EVENT);
d51202da JG	190	event_notification = container_of(notification,
d51202da JG	191	struct bt_notification_event, parent);
094ff7c0	192	return event_notification->event;
d51202da	193	}