ltt-sessiond/trace.c

   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 #define _GNU_SOURCE
  20 #include <errno.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <urcu/list.h>
  25
  26 #include "lttngerr.h"
  27 #include "trace.h"
  28 #include "session.h"
  29
  30 /*
  31  *  find_session_ust_trace_by_pid
  32  *
  33  *  Iterate over the session ust_traces and
  34  *  return a pointer or NULL if not found.
  35  */
  36 struct ltt_ust_trace *find_session_ust_trace_by_pid(struct ltt_session *session, pid_t pid)
  37 {
  38         struct ltt_ust_trace *iter;
  39
  40         cds_list_for_each_entry(iter, &session->ust_traces, list) {
  41                 if (iter->pid == pid) {
  42                         /* Found */
  43                         return iter;
  44                 }
  45         }
  46
  47         return NULL;
  48 }
  49