[babeltrace.git] / src / lib / object.h

#ifndef BABELTRACE_OBJECT_INTERNAL_H
#define BABELTRACE_OBJECT_INTERNAL_H

/*
 * Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
 * Copyright 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.
 */

#include "common/babeltrace.h"
#include "common/assert.h"
#include <stdbool.h>

struct bt_object;

typedef void (*bt_object_release_func)(struct bt_object *);
typedef void (*bt_object_parent_is_owner_listener_func)(
		struct bt_object *);

static inline
void bt_object_get_no_null_check(const void *obj);

static inline
void bt_object_put_no_null_check(const void *obj);

/*
 * Babeltrace object base.
 *
 * All objects publicly exposed by Babeltrace APIs must contain this
 * object as their first member.
 */
struct bt_object {
	/*
	 * True if this object is shared, that is, it has a reference
	 * count.
	 */
	bool is_shared;

	/*
	 * Current reference count.
	 */
	unsigned long long ref_count;

	/*
	 * Release function called when the object's reference count
	 * falls to zero. For an object with a parent, this function is
	 * bt_object_with_parent_release_func(), which calls
	 * `spec_release_func` below if there's no current parent.
	 */
	bt_object_release_func release_func;

	/*
	 * Specific release function called by
	 * bt_object_with_parent_release_func() or directly by a
	 * parent object.
	 */
	bt_object_release_func spec_release_func;

	/*
	 * Optional callback for an object with a parent, called by
	 * bt_object_with_parent_release_func() to indicate to the
	 * object that its parent is its owner.
	 */
	bt_object_parent_is_owner_listener_func
		parent_is_owner_listener_func;

	/*
	 * Optional parent object.
	 */
	struct bt_object *parent;
};

static inline
unsigned long long bt_object_get_ref_count(const struct bt_object *c_obj)
{
	struct bt_object *obj = (void *) c_obj;

	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);
	return obj->ref_count;
}

static inline
struct bt_object *bt_object_borrow_parent(const struct bt_object *c_obj)
{
	struct bt_object *obj = (void *) c_obj;

	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);
	return obj->parent;
}

static inline
struct bt_object *bt_object_get_parent(const struct bt_object *c_obj)
{
	struct bt_object *obj = (void *) c_obj;
	struct bt_object *parent = bt_object_borrow_parent(obj);

	if (parent) {
		bt_object_get_no_null_check(parent);
	}

	return parent;
}

static inline
void bt_object_set_parent(struct bt_object *child, struct bt_object *parent)
{
	BT_ASSERT(child);
	BT_ASSERT(child->is_shared);

#ifdef BT_LOGV
	BT_LOGV("Setting object's parent: addr=%p, parent-addr=%p",
		child, parent);
#endif

	/*
	 * It is assumed that a "child" having a parent is publicly
	 * reachable. Therefore, a reference to its parent must be
	 * taken. The reference to the parent will be released once the
	 * object's reference count falls to zero.
	 */
	if (parent) {
		BT_ASSERT(!child->parent);
		child->parent = parent;
		bt_object_get_no_null_check(parent);
	} else {
		if (child->parent) {
			bt_object_put_no_null_check(child->parent);
		}

		child->parent = NULL;
	}
}

static inline
void bt_object_try_spec_release(struct bt_object *obj)
{
	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);
	BT_ASSERT(obj->spec_release_func);

	if (bt_object_get_ref_count(obj) == 0) {
		obj->spec_release_func(obj);
	}
}

static inline
void bt_object_with_parent_release_func(struct bt_object *obj)
{
	if (obj->parent) {
		/*
		 * Keep our own copy of the parent address because `obj`
		 * could be destroyed in
		 * obj->parent_is_owner_listener_func().
		 */
		struct bt_object *parent = obj->parent;

#ifdef BT_LOGV
		BT_LOGV("Releasing parented object: addr=%p, ref-count=%llu, "
			"parent-addr=%p, parent-ref-count=%llu",
			obj, obj->ref_count,
			parent, parent->ref_count);
#endif

		if (obj->parent_is_owner_listener_func) {
			/*
			 * Object has a chance to destroy itself here
			 * under certain conditions and notify its
			 * parent. At this point the parent is
			 * guaranteed to exist because it's not put yet.
			 */
			obj->parent_is_owner_listener_func(obj);
		}

		/* The release function will be invoked by the parent. */
		bt_object_put_no_null_check(parent);
	} else {
		bt_object_try_spec_release(obj);
	}
}

static inline
void bt_object_init(struct bt_object *obj, bool is_shared,
		bt_object_release_func release_func)
{
	BT_ASSERT(obj);
	BT_ASSERT(!is_shared || release_func);
	obj->is_shared = is_shared;
	obj->release_func = release_func;
	obj->parent_is_owner_listener_func = NULL;
	obj->spec_release_func = NULL;
	obj->parent = NULL;
	obj->ref_count = 1;
}

static inline
void bt_object_init_shared(struct bt_object *obj,
		bt_object_release_func release_func)
{
	bt_object_init(obj, true, release_func);
}

static inline
void bt_object_init_unique(struct bt_object *obj)
{
	bt_object_init(obj, false, NULL);
}

static inline
void bt_object_init_shared_with_parent(struct bt_object *obj,
		bt_object_release_func spec_release_func)
{
	BT_ASSERT(obj);
	BT_ASSERT(spec_release_func);
	bt_object_init_shared(obj, bt_object_with_parent_release_func);
	obj->spec_release_func = spec_release_func;
}

static inline
void bt_object_set_parent_is_owner_listener_func(struct bt_object *obj,
		bt_object_parent_is_owner_listener_func func)
{
	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);
	BT_ASSERT(obj->spec_release_func);
	((struct bt_object *) obj)->parent_is_owner_listener_func = func;
}

static inline
void bt_object_inc_ref_count(const struct bt_object *c_obj)
{
	struct bt_object *obj = (void *) c_obj;

	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);
	obj->ref_count++;
	BT_ASSERT(obj->ref_count != 0);
}

static inline
void bt_object_get_no_null_check_no_parent_check(const struct bt_object *c_obj)
{
	struct bt_object *obj = (void *) c_obj;

	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);

#ifdef BT_LOGV
	BT_LOGV("Incrementing object's reference count: %llu -> %llu: "
		"addr=%p, cur-count=%llu, new-count=%llu",
		obj->ref_count, obj->ref_count + 1,
		obj, obj->ref_count, obj->ref_count + 1);
#endif

	bt_object_inc_ref_count(obj);
}

static inline
void bt_object_get_no_null_check(const void *c_obj)
{
	struct bt_object *obj = (void *) c_obj;

	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);

	if (unlikely(obj->parent && bt_object_get_ref_count(obj) == 0)) {
#ifdef BT_LOGV
		BT_LOGV("Incrementing object's parent's reference count: "
			"addr=%p, parent-addr=%p", obj, obj->parent);
#endif

		bt_object_get_no_null_check(obj->parent);
	}

#ifdef BT_LOGV
	BT_LOGV("Incrementing object's reference count: %llu -> %llu: "
		"addr=%p, cur-count=%llu, new-count=%llu",
		obj->ref_count, obj->ref_count + 1,
		obj, obj->ref_count, obj->ref_count + 1);
#endif

	bt_object_inc_ref_count(obj);
}

static inline
void bt_object_put_no_null_check(const void *c_obj)
{
	struct bt_object *obj = (void *) c_obj;

	BT_ASSERT(obj);
	BT_ASSERT(obj->is_shared);
	BT_ASSERT(obj->ref_count > 0);

#ifdef BT_LOGV
	BT_LOGV("Decrementing object's reference count: %llu -> %llu: "
		"addr=%p, cur-count=%llu, new-count=%llu",
		obj->ref_count, obj->ref_count - 1,
		obj, obj->ref_count, obj->ref_count - 1);
#endif

	obj->ref_count--;

	if (obj->ref_count == 0) {
		BT_ASSERT(obj->release_func);
		obj->release_func(obj);
	}
}

static inline
void bt_object_get_ref(const void *ptr)
{
	struct bt_object *obj = (void *) ptr;

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

#ifdef BT_ASSERT_PRE
	BT_ASSERT_PRE(obj->is_shared, "Object is not shared: %!+O", obj);
#endif

	bt_object_get_no_null_check(obj);
}

static inline
void bt_object_put_ref(const void *ptr)
{
	struct bt_object *obj = (void *) ptr;

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

#ifdef BT_ASSERT_PRE
	BT_ASSERT_PRE(obj->is_shared, "Object is not shared: %!+O", obj);
	BT_ASSERT_PRE(bt_object_get_ref_count(obj) > 0,
		"Decrementing a reference count set to 0: %!+O", ptr);
#endif

	bt_object_put_no_null_check(obj);
}

#define BT_OBJECT_PUT_REF_AND_RESET(_var)	\
	do {					\
		bt_object_put_ref(_var);	\
		(_var) = NULL;			\
	} while (0)

#define BT_OBJECT_MOVE_REF(_var_dst, _var_src)	\
	do {					\
		bt_object_put_ref(_var_dst);	\
		(_var_dst) = (_var_src);	\
		(_var_src) = NULL;		\
	} while (0)

#endif /* BABELTRACE_OBJECT_INTERNAL_H */
Commit	Line	Data
83509119 JG	1	#ifndef BABELTRACE_OBJECT_INTERNAL_H
83509119 JG	2	#define BABELTRACE_OBJECT_INTERNAL_H
273b65be JG	3
273b65be JG	4	/*
e2f7325d	5	* Copyright 2017-2018 Philippe Proulx <pproulx@efficios.com>
83509119	6	* Copyright 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
578e048b MJ	27	#include "common/babeltrace.h"
578e048b MJ	28	#include "common/assert.h"
312c056a	29	#include <stdbool.h>
273b65be	30
3fea54f6 PP	31	struct bt_object;
	32
	33	typedef void (bt_object_release_func)(struct bt_object );
	34	typedef void (*bt_object_parent_is_owner_listener_func)(
	35	struct bt_object *);
	36
	37	static inline
398454ed	38	void bt_object_get_no_null_check(const void *obj);
3fea54f6 PP	39
3fea54f6 PP	40	static inline
398454ed	41	void bt_object_put_no_null_check(const void *obj);
3fea54f6 PP	42
	43	/*
	44	* Babeltrace object base.
	45	*
	46	* All objects publicly exposed by Babeltrace APIs must contain this
	47	* object as their first member.
de3dd40e	48	*/
83509119	49	struct bt_object {
312c056a	50	/*
3fea54f6 PP	51	* True if this object is shared, that is, it has a reference
3fea54f6 PP	52	* count.
312c056a PP	53	*/
312c056a PP	54	bool is_shared;
3fea54f6 PP	55
	56	/*
	57	* Current reference count.
	58	*/
	59	unsigned long long ref_count;
	60
	61	/*
	62	* Release function called when the object's reference count
	63	* falls to zero. For an object with a parent, this function is
	64	* bt_object_with_parent_release_func(), which calls
	65	* `spec_release_func` below if there's no current parent.
	66	*/
	67	bt_object_release_func release_func;
	68
	69	/*
	70	* Specific release function called by
	71	* bt_object_with_parent_release_func() or directly by a
	72	* parent object.
	73	*/
	74	bt_object_release_func spec_release_func;
	75
	76	/*
	77	* Optional callback for an object with a parent, called by
	78	* bt_object_with_parent_release_func() to indicate to the
	79	* object that its parent is its owner.
	80	*/
	81	bt_object_parent_is_owner_listener_func
	82	parent_is_owner_listener_func;
	83
	84	/*
	85	* Optional parent object.
	86	*/
	87	struct bt_object *parent;
273b65be JG	88	};
	89
	90	static inline
398454ed	91	unsigned long long bt_object_get_ref_count(const struct bt_object *c_obj)
7c56f3cc	92	{
398454ed PP	93	struct bt_object obj = (void ) c_obj;
398454ed PP	94
3fea54f6 PP	95	BT_ASSERT(obj);
	96	BT_ASSERT(obj->is_shared);
	97	return obj->ref_count;
	98	}
5d2d9981	99
3fea54f6	100	static inline
398454ed	101	struct bt_object bt_object_borrow_parent(const struct bt_object c_obj)
3fea54f6	102	{
398454ed PP	103	struct bt_object obj = (void ) c_obj;
398454ed PP	104
3fea54f6 PP	105	BT_ASSERT(obj);
	106	BT_ASSERT(obj->is_shared);
	107	return obj->parent;
7c56f3cc MD	108	}
	109
	110	static inline
398454ed	111	struct bt_object bt_object_get_parent(const struct bt_object c_obj)
5d2d9981	112	{
398454ed	113	struct bt_object obj = (void ) c_obj;
3fea54f6 PP	114	struct bt_object *parent = bt_object_borrow_parent(obj);
	115
	116	if (parent) {
	117	bt_object_get_no_null_check(parent);
	118	}
	119
	120	return parent;
	121	}
	122
	123	static inline
	124	void bt_object_set_parent(struct bt_object child, struct bt_object parent)
	125	{
	126	BT_ASSERT(child);
	127	BT_ASSERT(child->is_shared);
5d2d9981	128
0f5e83e5	129	#ifdef BT_LOGV
3fea54f6 PP	130	BT_LOGV("Setting object's parent: addr=%p, parent-addr=%p",
3fea54f6 PP	131	child, parent);
0f5e83e5 PP	132	#endif
0f5e83e5 PP	133
3fea54f6 PP	134	/*
	135	* It is assumed that a "child" having a parent is publicly
	136	* reachable. Therefore, a reference to its parent must be
	137	* taken. The reference to the parent will be released once the
	138	* object's reference count falls to zero.
	139	*/
	140	if (parent) {
	141	BT_ASSERT(!child->parent);
	142	child->parent = parent;
	143	bt_object_get_no_null_check(parent);
	144	} else {
	145	if (child->parent) {
	146	bt_object_put_no_null_check(child->parent);
	147	}
	148
	149	child->parent = NULL;
5d2d9981 JG	150	}
	151	}
	152
7c56f3cc	153	static inline
3fea54f6 PP	154	void bt_object_try_spec_release(struct bt_object *obj)
	155	{
	156	BT_ASSERT(obj);
	157	BT_ASSERT(obj->is_shared);
	158	BT_ASSERT(obj->spec_release_func);
	159
	160	if (bt_object_get_ref_count(obj) == 0) {
	161	obj->spec_release_func(obj);
	162	}
	163	}
	164
	165	static inline
	166	void bt_object_with_parent_release_func(struct bt_object *obj)
5d2d9981 JG	167	{
5d2d9981 JG	168	if (obj->parent) {
3fea54f6 PP	169	/*
	170	* Keep our own copy of the parent address because `obj`
	171	* could be destroyed in
	172	* obj->parent_is_owner_listener_func().
	173	*/
0f5e83e5 PP	174	struct bt_object *parent = obj->parent;
	175
	176	#ifdef BT_LOGV
3fea54f6 PP	177	BT_LOGV("Releasing parented object: addr=%p, ref-count=%llu, "
	178	"parent-addr=%p, parent-ref-count=%llu",
	179	obj, obj->ref_count,
	180	parent, parent->ref_count);
0f5e83e5	181	#endif
f167d3c0	182
3fea54f6	183	if (obj->parent_is_owner_listener_func) {
f167d3c0 PP	184	/*
	185	* Object has a chance to destroy itself here
	186	* under certain conditions and notify its
	187	* parent. At this point the parent is
	188	* guaranteed to exist because it's not put yet.
	189	*/
3fea54f6	190	obj->parent_is_owner_listener_func(obj);
f167d3c0 PP	191	}
f167d3c0 PP	192
5d2d9981	193	/* The release function will be invoked by the parent. */
3fea54f6	194	bt_object_put_no_null_check(parent);
5d2d9981	195	} else {
3fea54f6	196	bt_object_try_spec_release(obj);
5d2d9981 JG	197	}
	198	}
	199
	200	static inline
3fea54f6 PP	201	void bt_object_init(struct bt_object *obj, bool is_shared,
3fea54f6 PP	202	bt_object_release_func release_func)
5d2d9981	203	{
3fea54f6 PP	204	BT_ASSERT(obj);
	205	BT_ASSERT(!is_shared \|\| release_func);
	206	obj->is_shared = is_shared;
	207	obj->release_func = release_func;
	208	obj->parent_is_owner_listener_func = NULL;
	209	obj->spec_release_func = NULL;
	210	obj->parent = NULL;
	211	obj->ref_count = 1;
dc3fffef PP	212	}
	213
	214	static inline
3fea54f6 PP	215	void bt_object_init_shared(struct bt_object *obj,
3fea54f6 PP	216	bt_object_release_func release_func)
dc3fffef	217	{
3fea54f6	218	bt_object_init(obj, true, release_func);
5d2d9981 JG	219	}
	220
	221	static inline
3fea54f6	222	void bt_object_init_unique(struct bt_object *obj)
273b65be	223	{
3fea54f6 PP	224	bt_object_init(obj, false, NULL);
3fea54f6 PP	225	}
5d2d9981	226
3fea54f6 PP	227	static inline
	228	void bt_object_init_shared_with_parent(struct bt_object *obj,
	229	bt_object_release_func spec_release_func)
	230	{
	231	BT_ASSERT(obj);
	232	BT_ASSERT(spec_release_func);
	233	bt_object_init_shared(obj, bt_object_with_parent_release_func);
	234	obj->spec_release_func = spec_release_func;
	235	}
0f5e83e5	236
3fea54f6 PP	237	static inline
	238	void bt_object_set_parent_is_owner_listener_func(struct bt_object *obj,
	239	bt_object_parent_is_owner_listener_func func)
	240	{
	241	BT_ASSERT(obj);
	242	BT_ASSERT(obj->is_shared);
	243	BT_ASSERT(obj->spec_release_func);
	244	((struct bt_object *) obj)->parent_is_owner_listener_func = func;
5d2d9981 JG	245	}
5d2d9981 JG	246
312c056a	247	static inline
398454ed	248	void bt_object_inc_ref_count(const struct bt_object *c_obj)
312c056a	249	{
398454ed PP	250	struct bt_object obj = (void ) c_obj;
398454ed PP	251
3fea54f6 PP	252	BT_ASSERT(obj);
	253	BT_ASSERT(obj->is_shared);
	254	obj->ref_count++;
	255	BT_ASSERT(obj->ref_count != 0);
312c056a PP	256	}
312c056a PP	257
6c677fb5	258	static inline
398454ed	259	void bt_object_get_no_null_check_no_parent_check(const struct bt_object *c_obj)
6c677fb5	260	{
398454ed PP	261	struct bt_object obj = (void ) c_obj;
398454ed PP	262
6c677fb5 PP	263	BT_ASSERT(obj);
	264	BT_ASSERT(obj->is_shared);
	265
	266	#ifdef BT_LOGV
	267	BT_LOGV("Incrementing object's reference count: %llu -> %llu: "
	268	"addr=%p, cur-count=%llu, new-count=%llu",
	269	obj->ref_count, obj->ref_count + 1,
	270	obj, obj->ref_count, obj->ref_count + 1);
	271	#endif
	272
	273	bt_object_inc_ref_count(obj);
	274	}
	275
5d2d9981	276	static inline
398454ed	277	void bt_object_get_no_null_check(const void *c_obj)
5d2d9981	278	{
398454ed PP	279	struct bt_object obj = (void ) c_obj;
398454ed PP	280
3fea54f6 PP	281	BT_ASSERT(obj);
3fea54f6 PP	282	BT_ASSERT(obj->is_shared);
5d2d9981	283
3fea54f6 PP	284	if (unlikely(obj->parent && bt_object_get_ref_count(obj) == 0)) {
	285	#ifdef BT_LOGV
	286	BT_LOGV("Incrementing object's parent's reference count: "
	287	"addr=%p, parent-addr=%p", obj, obj->parent);
	288	#endif
	289
	290	bt_object_get_no_null_check(obj->parent);
	291	}
	292
	293	#ifdef BT_LOGV
	294	BT_LOGV("Incrementing object's reference count: %llu -> %llu: "
	295	"addr=%p, cur-count=%llu, new-count=%llu",
	296	obj->ref_count, obj->ref_count + 1,
	297	obj, obj->ref_count, obj->ref_count + 1);
	298	#endif
	299
	300	bt_object_inc_ref_count(obj);
273b65be JG	301	}
273b65be JG	302
f167d3c0	303	static inline
398454ed	304	void bt_object_put_no_null_check(const void *c_obj)
f167d3c0	305	{
398454ed PP	306	struct bt_object obj = (void ) c_obj;
398454ed PP	307
f6ccaed9	308	BT_ASSERT(obj);
3fea54f6 PP	309	BT_ASSERT(obj->is_shared);
	310	BT_ASSERT(obj->ref_count > 0);
	311
	312	#ifdef BT_LOGV
	313	BT_LOGV("Decrementing object's reference count: %llu -> %llu: "
	314	"addr=%p, cur-count=%llu, new-count=%llu",
	315	obj->ref_count, obj->ref_count - 1,
	316	obj, obj->ref_count, obj->ref_count - 1);
	317	#endif
	318
	319	obj->ref_count--;
	320
	321	if (obj->ref_count == 0) {
	322	BT_ASSERT(obj->release_func);
	323	obj->release_func(obj);
	324	}
f167d3c0 PP	325	}
f167d3c0 PP	326
c5b9b441 PP	327	static inline
	328	void bt_object_get_ref(const void *ptr)
	329	{
	330	struct bt_object obj = (void ) ptr;
	331
	332	if (unlikely(!obj)) {
	333	return;
	334	}
	335
	336	#ifdef BT_ASSERT_PRE
	337	BT_ASSERT_PRE(obj->is_shared, "Object is not shared: %!+O", obj);
	338	#endif
	339
	340	bt_object_get_no_null_check(obj);
	341	}
	342
	343	static inline
	344	void bt_object_put_ref(const void *ptr)
	345	{
	346	struct bt_object obj = (void ) ptr;
	347
	348	if (unlikely(!obj)) {
	349	return;
	350	}
	351
	352	#ifdef BT_ASSERT_PRE
	353	BT_ASSERT_PRE(obj->is_shared, "Object is not shared: %!+O", obj);
	354	BT_ASSERT_PRE(bt_object_get_ref_count(obj) > 0,
	355	"Decrementing a reference count set to 0: %!+O", ptr);
	356	#endif
	357
	358	bt_object_put_no_null_check(obj);
	359	}
	360
	361	#define BT_OBJECT_PUT_REF_AND_RESET(_var) \
	362	do { \
	363	bt_object_put_ref(_var); \
	364	(_var) = NULL; \
	365	} while (0)
	366
	367	#define BT_OBJECT_MOVE_REF(_var_dst, _var_src) \
	368	do { \
	369	bt_object_put_ref(_var_dst); \
	370	(_var_dst) = (_var_src); \
	371	(_var_src) = NULL; \
	372	} while (0)
	373
83509119	374	#endif /* BABELTRACE_OBJECT_INTERNAL_H */