projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| a58c490f JG |
1 | /* |
| 2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
| 3 | * | |
| 4 | * This library is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
| 6 | * as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
| 11 | * for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU Lesser General Public License | |
| 14 | * along with this library; if not, write to the Free Software Foundation, | |
| 15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef LTTNG_NOTIFICATION_INTERNAL_H | |
| 19 | #define LTTNG_NOTIFICATION_INTERNAL_H | |
| 20 | ||
| 21 | #include <lttng/notification/notification.h> | |
| 22 | #include <common/macros.h> | |
| 23 | #include <common/buffer-view.h> | |
| 24 | #include <stdint.h> | |
| 25 | #include <stdbool.h> | |
| 26 | ||
| 27 | struct lttng_notification { | |
| 28 | struct lttng_condition *condition; | |
| 29 | struct lttng_evaluation *evaluation; | |
| 30 | /* | |
| 31 | * The ownership of the notification's inner-elements depends | |
| 32 | * on the way it was created. The notification owns both | |
| 33 | * the condition and evaluation if it was obtained from a notification | |
| 34 | * channel (i.e. created using lttng_notification_create_from_buffer) | |
| 35 | * as the user may never access the condition and evaluation, | |
| 36 | * thus never getting a chance to free them. | |
| 37 | * | |
| 38 | * However, when the _private_ lttng_notification_create() function | |
| 39 | * is used, no ownership of condition and evaluation is assumed by | |
| 40 | * the notification object. The main reason for this change in | |
| 41 | * behavior is that internal users of this API only use the object | |
| 42 | * to use its serialization facilities. | |
| 43 | */ | |
| 44 | bool owns_elements; | |
| 45 | }; | |
| 46 | ||
| 47 | struct lttng_notification_comm { | |
| 48 | /* Size of the payload following this field. */ | |
| 49 | uint32_t length; | |
| 50 | /* Condition and evaluation objects follow. */ | |
| 51 | char payload[]; | |
| 52 | } LTTNG_PACKED; | |
| 53 | ||
| 54 | LTTNG_HIDDEN | |
| 55 | struct lttng_notification *lttng_notification_create( | |
| 56 | struct lttng_condition *condition, | |
| 57 | struct lttng_evaluation *evaluation); | |
| 58 | ||
| 59 | LTTNG_HIDDEN | |
| 60 | ssize_t lttng_notification_serialize(struct lttng_notification *notification, | |
| 61 | char *buf); | |
| 62 | ||
| 63 | LTTNG_HIDDEN | |
| 64 | ssize_t lttng_notification_create_from_buffer( | |
| 65 | const struct lttng_buffer_view *view, | |
| 66 | struct lttng_notification **notification); | |
| 67 | ||
| 68 | #endif /* LTTNG_NOTIFICATION_INTERNAL_H */ |