tools/lib/traceevent/kbuffer.h

   1 /*
   2  * Copyright (C) 2012 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
   3  *
   4  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation;
   8  * version 2.1 of the License (not later!)
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  20  */
  21 #ifndef _KBUFFER_H
  22 #define _KBUFFER_H
  23
  24 #ifndef TS_SHIFT
  25 #define TS_SHIFT                27
  26 #endif
  27
  28 enum kbuffer_endian {
  29         KBUFFER_ENDIAN_BIG,
  30         KBUFFER_ENDIAN_LITTLE,
  31 };
  32
  33 enum kbuffer_long_size {
  34         KBUFFER_LSIZE_4,
  35         KBUFFER_LSIZE_8,
  36 };
  37
  38 enum {
  39         KBUFFER_TYPE_PADDING            = 29,
  40         KBUFFER_TYPE_TIME_EXTEND        = 30,
  41         KBUFFER_TYPE_TIME_STAMP         = 31,
  42 };
  43
  44 struct kbuffer;
  45
  46 struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian);
  47 void kbuffer_free(struct kbuffer *kbuf);
  48 int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer);
  49 void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts);
  50 void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts);
  51 unsigned long long kbuffer_timestamp(struct kbuffer *kbuf);
  52
  53 void *kbuffer_translate_data(int swap, void *data, unsigned int *size);
  54
  55 void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts);
  56
  57 int kbuffer_curr_index(struct kbuffer *kbuf);
  58
  59 int kbuffer_curr_offset(struct kbuffer *kbuf);
  60 int kbuffer_curr_size(struct kbuffer *kbuf);
  61 int kbuffer_event_size(struct kbuffer *kbuf);
  62 int kbuffer_missed_events(struct kbuffer *kbuf);
  63 int kbuffer_subbuffer_size(struct kbuffer *kbuf);
  64
  65 void kbuffer_set_old_format(struct kbuffer *kbuf);
  66 int kbuffer_start_of_data(struct kbuffer *kbuf);
  67
  68 #endif /* _K_BUFFER_H */