ltt-sessiond/session.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   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; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   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.
  13  *
  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.
  17  */
  18
  19 #ifndef _LTT_SESSION_H
  20 #define _LTT_SESSION_H
  21
  22 #include <lttng/lttng.h>
  23 #include <uuid/uuid.h>
  24
  25 /*
  26  * FIXME: create a cmd_context structure to pass this kind of
  27  * information around as parameter. Will facilitate multithreaded design
  28  * later.
  29  */
  30 extern struct ltt_session *current_session;
  31
  32 /* Global session list */
  33 struct ltt_session_list {
  34         struct cds_list_head head;
  35 };
  36
  37 /* ltt-session - This data structure contains information needed
  38  * to identify a tracing session for both LTTng and UST.
  39  */
  40 struct ltt_session {
  41         char *name;
  42         struct cds_list_head list;
  43         uuid_t uuid;
  44         struct cds_list_head ust_traces;
  45         struct cds_list_head kernel_traces;
  46         unsigned int ust_trace_count;
  47         unsigned int kern_trace_count;
  48         pid_t ust_consumer;
  49         pid_t kernel_consumer;
  50 };
  51
  52 /* Prototypes */
  53 int create_session(char *name, uuid_t *session_id);
  54 int destroy_session(uuid_t *uuid);
  55 void get_lttng_session(struct lttng_session *lt);
  56 struct ltt_session *find_session_by_uuid(uuid_t session_id);
  57 struct ltt_session *find_session_by_name(char *name);
  58 unsigned int get_session_count(void);
  59
  60 #endif /* _LTT_SESSION_H */