include/ust/probe.h

   1 #ifndef _UST_PROBE_H
   2 #define _UST_PROBE_H
   3
   4 /*
   5  * Copyright (C) 2009 Pierre-Marc Fournier
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  20  *
  21  */
  22
  23 /* Maximum number of callbacks per marker */
  24 #define LTT_NR_CALLBACKS        10
  25
  26 struct ltt_serialize_closure;
  27 struct ust_buffer;
  28
  29 typedef size_t (*ltt_serialize_cb)(struct ust_buffer *buf, size_t buf_offset,
  30                         struct ltt_serialize_closure *closure,
  31                         void *serialize_private,
  32                         unsigned int stack_pos_ctx,
  33                         int *largest_align,
  34                         const char *fmt, va_list *args);
  35
  36 struct ltt_available_probe {
  37         const char *name;               /* probe name */
  38         const char *format;
  39         marker_probe_func *probe_func;
  40         ltt_serialize_cb callbacks[LTT_NR_CALLBACKS];
  41         struct cds_list_head node;          /* registered probes list */
  42 };
  43
  44 extern int ltt_probe_register(struct ltt_available_probe *pdata);
  45 extern int ltt_probe_unregister(struct ltt_available_probe *pdata);
  46 extern int ltt_marker_connect(const char *channel, const char *mname,
  47                 const char *pname);
  48 extern int ltt_marker_disconnect(const char *channel, const char *mname,
  49                 const char *pname);
  50
  51 #endif /* _UST_PROBE_H */