2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 #ifndef _LTT_SESSION_H
20 #define _LTT_SESSION_H
22 #include <urcu/list.h>
25 * Tracing session list
27 * Statically declared in session.c and can be accessed by using
28 * get_session_list() function that returns the pointer to the list.
30 struct ltt_session_list
{
32 * This lock protects any read/write access to the list and count (which is
33 * basically the list size). All public functions in session.c acquire this
34 * lock and release it before returning. If none of those functions are
35 * used, the lock MUST be acquired in order to iterate or/and do any
36 * actions on that list.
41 * Number of element in the list. The session list lock MUST be acquired if
42 * this counter is used when iterating over the session list.
46 /* Linked list head */
47 struct cds_list_head head
;
51 * This data structure contains information needed to identify a tracing
52 * session for both LTTng and UST.
57 struct ltt_kernel_session
*kernel_session
;
58 struct cds_list_head ust_traces
;
59 unsigned int ust_trace_count
;
61 * Protect any read/write on this session data structure. This lock must be
62 * acquired *before* using any public functions declared below. Use
63 * lock_session() and unlock_session() for that.
66 struct cds_list_head list
;
70 int create_session(char *name
, char *path
);
71 int destroy_session(char *name
);
73 void lock_session(struct ltt_session
*session
);
74 void lock_session_list(void);
75 void unlock_session(struct ltt_session
*session
);
76 void unlock_session_list(void);
78 struct ltt_session
*find_session_by_name(char *name
);
79 struct ltt_session_list
*get_session_list(void);
81 #endif /* _LTT_SESSION_H */
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