projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| de27ada2 JG |
1 | /* |
| 2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms of the GNU General Public License, version 2 only, as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program 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 General Public License for | |
| 11 | * more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License along with | |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
| 15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 16 | */ | |
| 17 | ||
| 18 | #ifndef NOTIFICATION_THREAD_H | |
| 19 | #define NOTIFICATION_THREAD_H | |
| 20 | ||
| 21 | #include <urcu/wfcqueue.h> | |
| 22 | #include <lttng/trigger/trigger.h> | |
| 23 | ||
| 24 | enum notification_command_type { | |
| 25 | NOTIFICATION_COMMAND_TYPE_NEW_TRIGGER, | |
| 26 | }; | |
| 27 | ||
| 28 | struct notification_command { | |
| 29 | /* Futex on which to wait for command reply. */ | |
| 30 | int32_t futex; | |
| 31 | enum lttng_error_code result; | |
| 32 | enum notification_command_type type; | |
| 33 | }; | |
| 34 | ||
| 35 | struct notification_new_trigger_command { | |
| 36 | struct notification_command parent; | |
| 37 | /* Set to NULL if ownership was transfered. */ | |
| 38 | struct lttng_trigger *trigger; | |
| 39 | }; | |
| 40 | ||
| 41 | /* Data passed to the thread on initialization. */ | |
| 42 | struct notification_thread_data { | |
| 43 | /* | |
| 44 | * Queue of struct notification command. | |
| 45 | * event_fd must be WRITE(2) to signal that a new command | |
| 46 | * has been enqueued. | |
| 47 | */ | |
| 48 | struct notification_cmd_queue { | |
| 49 | int event_fd; | |
| 50 | struct cds_wfcq_head head; | |
| 51 | struct cds_wfcq_tail tail; | |
| 52 | } cmd_queue; | |
| 53 | }; | |
| 54 | ||
| 55 | struct notification_command *notification_new_trigger_command_create( | |
| 56 | struct lttng_trigger *trigger); | |
| 57 | struct notification_command *notification_new_trigger_command_destroy( | |
| 58 | struct lttng_trigger *trigger); | |
| 59 | ||
| 60 | void *thread_notification(void *data); | |
| 61 | ||
| 62 | int notification_thread_init_data(struct notification_thread_data **data); | |
| 63 | void notification_thread_destroy_data(struct notification_thread_data *data); | |
| 64 | ||
| 65 | #endif /* NOTIFICATION_THREAD_H */ |