| 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_CHANNEL_H |
| 19 | #define LTTNG_NOTIFICATION_CHANNEL_H |
| 20 | |
| 21 | #ifdef __cplusplus |
| 22 | extern "C" { |
| 23 | #endif |
| 24 | |
| 25 | struct lttng_endpoint; |
| 26 | struct lttng_condition; |
| 27 | struct lttng_notification; |
| 28 | struct lttng_notification_channel; |
| 29 | |
| 30 | /* LTTng Notification channel */ |
| 31 | enum lttng_notification_channel_status { |
| 32 | LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED = 1, |
| 33 | LTTNG_NOTIFICATION_CHANNEL_STATUS_OK = 0, |
| 34 | LTTNG_NOTIFICATION_CHANNEL_STATUS_ERROR = -1, |
| 35 | LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED = -2, |
| 36 | LTTNG_NOTIFICATION_CHANNEL_STATUS_ALREADY_SUBSCRIBED = -3, |
| 37 | /* Condition unknown. */ |
| 38 | LTTNG_NOTIFICATION_CHANNEL_STATUS_UNKNOWN_CONDITION = -4, |
| 39 | LTTNG_NOTIFICATION_CHANNEL_STATUS_INVALID = -5, |
| 40 | LTTNG_NOTIFICATION_CHANNEL_STATUS_UNSUPPORTED_VERSION = -6, |
| 41 | }; |
| 42 | |
| 43 | extern struct lttng_notification_channel *lttng_notification_channel_create( |
| 44 | struct lttng_endpoint *endpoint); |
| 45 | |
| 46 | extern enum lttng_notification_channel_status |
| 47 | lttng_notification_channel_get_next_notification( |
| 48 | struct lttng_notification_channel *channel, |
| 49 | struct lttng_notification **notification); |
| 50 | |
| 51 | extern enum lttng_notification_channel_status |
| 52 | lttng_notification_channel_subscribe( |
| 53 | struct lttng_notification_channel *channel, |
| 54 | const struct lttng_condition *condition); |
| 55 | |
| 56 | extern enum lttng_notification_channel_status |
| 57 | lttng_notification_channel_unsubscribe( |
| 58 | struct lttng_notification_channel *channel, |
| 59 | const struct lttng_condition *condition); |
| 60 | |
| 61 | extern void lttng_notification_channel_destroy( |
| 62 | struct lttng_notification_channel *channel); |
| 63 | |
| 64 | #ifdef __cplusplus |
| 65 | } |
| 66 | #endif |
| 67 | |
| 68 | #endif /* LTTNG_NOTIFICATION_CHANNEL_H */ |