src/bin/lttng-relayd/lttng-relayd.h

   1 /*
   2  * Copyright (C) 2012 - 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
   6  * it under the terms of the GNU General Public License, version 2 only,
   7  * as 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
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #ifndef LTTNG_RELAYD_H
  20 #define LTTNG_RELAYD_H
  21
  22 #include <limits.h>
  23 #include <urcu.h>
  24 #include <urcu/wfcqueue.h>
  25
  26 #include <common/hashtable/hashtable.h>
  27
  28 /*
  29  * Queue used to enqueue relay requests
  30  */
  31 struct relay_conn_queue {
  32         struct cds_wfcq_head head;
  33         struct cds_wfcq_tail tail;
  34         int32_t futex;
  35 };
  36
  37 struct relay_local_data {
  38         struct lttng_ht *sessions_ht;
  39 };
  40
  41 extern char *opt_output_path;
  42
  43 /*
  44  * Contains stream indexed by ID. This is important since many commands lookup
  45  * streams only by ID thus also keeping them in this hash table makes the
  46  * search O(1) instead of iterating over the ctf_traces_ht of the session.
  47  */
  48 extern struct lttng_ht *relay_streams_ht;
  49
  50 extern struct lttng_ht *viewer_streams_ht;
  51 extern struct lttng_ht *indexes_ht;
  52
  53 extern const char *tracing_group_name;
  54
  55 extern const char * const config_section_name;
  56
  57 extern int thread_quit_pipe[2];
  58
  59 void lttng_relay_notify_ready(void);
  60 int lttng_relay_stop_threads(void);
  61
  62 #endif /* LTTNG_RELAYD_H */