| 1 | #ifndef _CTF_TRACE_H |
| 2 | #define _CTF_TRACE_H |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com> |
| 6 | * David Goulet <dgoulet@efficios.com> |
| 7 | * 2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License, version 2 only, as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 16 | * more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along with |
| 19 | * this program; if not, write to the Free Software Foundation, Inc., 51 |
| 20 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | */ |
| 22 | |
| 23 | #include <inttypes.h> |
| 24 | #include <urcu/ref.h> |
| 25 | |
| 26 | #include <common/hashtable/hashtable.h> |
| 27 | |
| 28 | #include "session.h" |
| 29 | #include "stream.h" |
| 30 | #include "viewer-stream.h" |
| 31 | |
| 32 | struct ctf_trace { |
| 33 | /* |
| 34 | * The ctf_trace reflock nests inside the stream reflock. |
| 35 | */ |
| 36 | pthread_mutex_t reflock; /* Protects refcounting */ |
| 37 | struct urcu_ref ref; /* Every stream has a ref on the trace. */ |
| 38 | struct relay_session *session; /* Back ref to trace session */ |
| 39 | |
| 40 | /* |
| 41 | * The ctf_trace lock nests inside the session lock. |
| 42 | */ |
| 43 | pthread_mutex_t lock; |
| 44 | uint64_t id; |
| 45 | struct relay_viewer_stream *viewer_metadata_stream; /* RCU protected */ |
| 46 | |
| 47 | /* |
| 48 | * Relay streams associated with this ctf trace. |
| 49 | * Updates are protected by the stream_list lock. |
| 50 | * Traversals are protected by RCU. |
| 51 | */ |
| 52 | struct cds_list_head stream_list; |
| 53 | pthread_mutex_t stream_list_lock; |
| 54 | |
| 55 | /* |
| 56 | * Node within session trace hash table. Node is indexed by |
| 57 | * stream path name. |
| 58 | */ |
| 59 | struct lttng_ht_node_str node; |
| 60 | struct rcu_head rcu_node; /* For call_rcu teardown. */ |
| 61 | }; |
| 62 | |
| 63 | struct ctf_trace *ctf_trace_get_by_path_or_create(struct relay_session *session, |
| 64 | char *path_name); |
| 65 | bool ctf_trace_get(struct ctf_trace *trace); |
| 66 | void ctf_trace_put(struct ctf_trace *trace); |
| 67 | |
| 68 | int ctf_trace_close(struct ctf_trace *trace); |
| 69 | |
| 70 | struct relay_viewer_stream *ctf_trace_get_viewer_metadata_stream(struct ctf_trace *trace); |
| 71 | |
| 72 | #endif /* _CTF_TRACE_H */ |