event-rule: userspace probe: force location on create
[lttng-tools.git] / include / lttng / event-rule / userspace-probe.h
1 /*
2 * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-only
5 *
6 */
7
8 #ifndef LTTNG_EVENT_RULE_USERSPACE_PROBE_H
9 #define LTTNG_EVENT_RULE_USERSPACE_PROBE_H
10
11 #include <lttng/event-rule/event-rule.h>
12 #include <lttng/userspace-probe.h>
13
14 #ifdef __cplusplus
15 extern "C" {
16 #endif
17
18 /*
19 * Create a newly allocated user space probe event rule.
20 *
21 * The location is copied internally.
22 *
23 * Returns a new event rule on success, NULL on failure. This event rule must be
24 * destroyed using lttng_event_rule_destroy().
25 */
26 extern struct lttng_event_rule *lttng_event_rule_userspace_probe_create(
27 const struct lttng_userspace_probe_location *location);
28
29 /*
30 * Get the location of a user space probe event rule.
31 *
32 * The caller does not assume the ownership of the returned location.
33 * The location shall only be used for the duration of the event
34 * rule's lifetime, or before a different location is set.
35 *
36 * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's location
37 * on success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is
38 * passed, or LTTNG_EVENT_RULE_STATUS_UNSET if a location was not set prior to
39 * this call.
40 */
41 extern enum lttng_event_rule_status lttng_event_rule_userspace_probe_get_location(
42 const struct lttng_event_rule *rule,
43 const struct lttng_userspace_probe_location **location);
44
45 /*
46 * Set the name of a user space probe event rule.
47 *
48 * The name is copied internally.
49 *
50 * Return LTTNG_EVENT_RULE_STATUS_OK on success, LTTNG_EVENT_RULE_STATUS_INVALID
51 * if invalid parameters are passed.
52 */
53 extern enum lttng_event_rule_status lttng_event_rule_userspace_probe_set_event_name(
54 struct lttng_event_rule *rule, const char *name);
55
56 /*
57 * Get the name of a user space probe event rule.
58 *
59 * The caller does not assume the ownership of the returned name.
60 * The name shall only only be used for the duration of the event
61 * rule's lifetime, or before a different name is set.
62 *
63 * Returns LTTNG_EVENT_RULE_STATUS_OK and a pointer to the event rule's name on
64 * success, LTTNG_EVENT_RULE_STATUS_INVALID if an invalid parameter is passed,
65 * or LTTNG_EVENT_RULE_STATUS_UNSET if a name was not set prior to this call.
66 */
67 extern enum lttng_event_rule_status lttng_event_rule_userspace_probe_get_event_name(
68 const struct lttng_event_rule *rule, const char **name);
69
70 #ifdef __cplusplus
71 }
72 #endif
73
74 #endif /* LTTNG_EVENT_RULE_USERSPACE_PROBE_H */
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