| 1 | /* |
| 2 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * David Goulet <dgoulet@efficios.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License, version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License along with |
| 15 | * this program; if not, write to the Free Software Foundation, Inc., 51 |
| 16 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | */ |
| 18 | |
| 19 | #include "session.h" |
| 20 | |
| 21 | /* |
| 22 | * Lookup a session within the given hash table and session id. RCU read side |
| 23 | * lock MUST be acquired before calling this and as long as the caller has a |
| 24 | * reference to the object. |
| 25 | * |
| 26 | * Return session or NULL if not found. |
| 27 | */ |
| 28 | struct relay_session *session_find_by_id(struct lttng_ht *ht, uint64_t id) |
| 29 | { |
| 30 | struct relay_session *session = NULL; |
| 31 | struct lttng_ht_node_ulong *node; |
| 32 | struct lttng_ht_iter iter; |
| 33 | |
| 34 | assert(ht); |
| 35 | |
| 36 | lttng_ht_lookup(ht, (void *)((unsigned long) id), &iter); |
| 37 | node = lttng_ht_iter_get_node_ulong(&iter); |
| 38 | if (!node) { |
| 39 | goto end; |
| 40 | } |
| 41 | session = caa_container_of(node, struct relay_session, session_n); |
| 42 | |
| 43 | end: |
| 44 | return session; |
| 45 | } |