[babeltrace.git] / lib / ref.c

/*
 * ref.c: reference counting
 *
 * Babeltrace Library
 *
 * Copyright (c) 2015 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 "REF"
#include <babeltrace/lib-logging-internal.h>

#include <babeltrace/ref-internal.h>
#include <babeltrace/object-internal.h>

void *bt_get(void *ptr)
{
	struct bt_object *obj = ptr;

	if (unlikely(!obj)) {
		goto end;
	}

	if (unlikely(!obj->ref_count.release)) {
		goto end;
	}

	if (unlikely(obj->parent && bt_object_get_ref_count(obj) == 0)) {
		BT_LOGV("Incrementing object's parent's reference count: "
			"addr=%p, parent-addr=%p", ptr, obj->parent);
		bt_get(obj->parent);
	}
	BT_LOGV("Incrementing object's reference count: %lu -> %lu: "
		"addr=%p, cur-count=%lu, new-count=%lu",
		obj->ref_count.count, obj->ref_count.count + 1,
		ptr,
		obj->ref_count.count, obj->ref_count.count + 1);
	bt_ref_get(&obj->ref_count);

end:
	return obj;
}

void bt_put(void *ptr)
{
	struct bt_object *obj = ptr;

	if (unlikely(!obj)) {
		return;
	}

	if (unlikely(!obj->ref_count.release)) {
		return;
	}

	if (BT_LOG_ON_WARN && unlikely(bt_object_get_ref_count(obj) == 0)) {
		BT_LOGW("Decrementing a reference count set to 0: addr=%p",
			ptr);
	}

	BT_LOGV("Decrementing object's reference count: %lu -> %lu: "
		"addr=%p, cur-count=%lu, new-count=%lu",
		obj->ref_count.count, obj->ref_count.count - 1,
		ptr,
		obj->ref_count.count, obj->ref_count.count - 1);
	bt_ref_put(&obj->ref_count);
}
Commit	Line	Data
273b65be	1	/*
83509119 JG	2	* ref.c: reference counting
	3	*
	4	* Babeltrace Library
273b65be	5	*
83509119	6	* Copyright (c) 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
273b65be JG	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
f6b2f71d PP	27	#define BT_LOG_TAG "REF"
f6b2f71d PP	28	#include <babeltrace/lib-logging-internal.h>
40547d22	29
0f5e83e5 PP	30	#include <babeltrace/ref-internal.h>
0f5e83e5 PP	31	#include <babeltrace/object-internal.h>
f6b2f71d	32
47601e5f	33	void bt_get(void ptr)
273b65be	34	{
47601e5f JG	35	struct bt_object *obj = ptr;
47601e5f JG	36
a041af48	37	if (unlikely(!obj)) {
47601e5f JG	38	goto end;
47601e5f JG	39	}
273b65be	40
b1912a65 PP	41	if (unlikely(!obj->ref_count.release)) {
	42	goto end;
	43	}
	44
a041af48	45	if (unlikely(obj->parent && bt_object_get_ref_count(obj) == 0)) {
f6b2f71d PP	46	BT_LOGV("Incrementing object's parent's reference count: "
f6b2f71d PP	47	"addr=%p, parent-addr=%p", ptr, obj->parent);
47601e5f	48	bt_get(obj->parent);
83509119	49	}
57d2571d PP	50	BT_LOGV("Incrementing object's reference count: %lu -> %lu: "
	51	"addr=%p, cur-count=%lu, new-count=%lu",
	52	obj->ref_count.count, obj->ref_count.count + 1,
	53	ptr,
	54	obj->ref_count.count, obj->ref_count.count + 1);
47601e5f	55	bt_ref_get(&obj->ref_count);
b1912a65	56
47601e5f	57	end:
b82cd9f0	58	return obj;
273b65be JG	59	}
273b65be JG	60
b703b34e	61	void bt_put(void *ptr)
83509119	62	{
b703b34e	63	struct bt_object *obj = ptr;
83509119	64
a041af48	65	if (unlikely(!obj)) {
b703b34e	66	return;
83509119	67	}
b703b34e	68
b1912a65 PP	69	if (unlikely(!obj->ref_count.release)) {
	70	return;
	71	}
	72
aa04c1b6 PP	73	if (BT_LOG_ON_WARN && unlikely(bt_object_get_ref_count(obj) == 0)) {
	74	BT_LOGW("Decrementing a reference count set to 0: addr=%p",
	75	ptr);
	76	}
	77
f6b2f71d	78	BT_LOGV("Decrementing object's reference count: %lu -> %lu: "
57d2571d PP	79	"addr=%p, cur-count=%lu, new-count=%lu",
	80	obj->ref_count.count, obj->ref_count.count - 1,
	81	ptr,
	82	obj->ref_count.count, obj->ref_count.count - 1);
b703b34e	83	bt_ref_put(&obj->ref_count);
83509119	84	}