tools/lib/traceevent/kbuffer.h

   1 /* SPDX-License-Identifier: LGPL-2.1 */
   2 /*
   3  * Copyright (C) 2012 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
   4  *
   5  */
   6 #ifndef _KBUFFER_H
   7 #define _KBUFFER_H
   8
   9 #ifndef TS_SHIFT
  10 #define TS_SHIFT                27
  11 #endif
  12
  13 enum kbuffer_endian {
  14         KBUFFER_ENDIAN_BIG,
  15         KBUFFER_ENDIAN_LITTLE,
  16 };
  17
  18 enum kbuffer_long_size {
  19         KBUFFER_LSIZE_4,
  20         KBUFFER_LSIZE_8,
  21 };
  22
  23 enum {
  24         KBUFFER_TYPE_PADDING            = 29,
  25         KBUFFER_TYPE_TIME_EXTEND        = 30,
  26         KBUFFER_TYPE_TIME_STAMP         = 31,
  27 };
  28
  29 struct kbuffer;
  30
  31 struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian);
  32 void kbuffer_free(struct kbuffer *kbuf);
  33 int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer);
  34 void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts);
  35 void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts);
  36 unsigned long long kbuffer_timestamp(struct kbuffer *kbuf);
  37 unsigned long long kbuffer_subbuf_timestamp(struct kbuffer *kbuf, void *subbuf);
  38 unsigned int kbuffer_ptr_delta(struct kbuffer *kbuf, void *ptr);
  39
  40 void *kbuffer_translate_data(int swap, void *data, unsigned int *size);
  41
  42 void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts);
  43
  44 int kbuffer_curr_index(struct kbuffer *kbuf);
  45
  46 int kbuffer_curr_offset(struct kbuffer *kbuf);
  47 int kbuffer_curr_size(struct kbuffer *kbuf);
  48 int kbuffer_event_size(struct kbuffer *kbuf);
  49 int kbuffer_missed_events(struct kbuffer *kbuf);
  50 int kbuffer_subbuffer_size(struct kbuffer *kbuf);
  51
  52 void kbuffer_set_old_format(struct kbuffer *kbuf);
  53 int kbuffer_start_of_data(struct kbuffer *kbuf);
  54
  55 /* Debugging */
  56
  57 struct kbuffer_raw_info {
  58         int                     type;
  59         int                     length;
  60         unsigned long long      delta;
  61         void                    *next;
  62 };
  63
  64 /* Read raw data */
  65 struct kbuffer_raw_info *kbuffer_raw_get(struct kbuffer *kbuf, void *subbuf,
  66                                          struct kbuffer_raw_info *info);
  67
  68 #endif /* _K_BUFFER_H */