common/timestamps.c

   1 /*
   2     Copyright (C) 2002-2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU Lesser General Public License as published by
   6     the Free Software Foundation; either version 2.1 of the License, or
   7     (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 Lesser General Public License for more details.
  13
  14     You should have received a copy of the GNU Lesser 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
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include "timestamps.h"
  23 #include "JackTime.h"
  24
  25 typedef struct {
  26     jack_time_t when;
  27     const char *what;
  28 } jack_timestamp_t;
  29
  30 static jack_timestamp_t *timestamps = 0;
  31 static unsigned long timestamp_cnt = 0;
  32 static unsigned long timestamp_index;
  33
  34 void
  35 jack_init_timestamps (unsigned long howmany)
  36 {
  37         if (timestamps) {
  38                 free (timestamps);
  39         }
  40         timestamps = (jack_timestamp_t *)
  41                 malloc (howmany * sizeof(jack_timestamp_t));
  42         timestamp_cnt = howmany;
  43         memset (timestamps, 0, sizeof(jack_timestamp_t) * howmany);
  44         timestamp_index = 0;
  45 }
  46
  47 void
  48 jack_timestamp (const char *what)
  49 {
  50         if (timestamp_index < timestamp_cnt) {
  51                 timestamps[timestamp_index].when = GetMicroSeconds();
  52                 timestamps[timestamp_index].what = what;
  53                 ++timestamp_index;
  54         }
  55 }
  56
  57 void
  58 jack_dump_timestamps (FILE *out)
  59 {
  60         unsigned long i;
  61
  62         for (i = 0; i < timestamp_index; ++i) {
  63                 fprintf (out, "%-.32s %" PRIu64 " %" PRIu64,
  64                          timestamps[i].what, timestamps[i].when,
  65                          timestamps[i].when - timestamps[0].when);
  66                 if (i > 0) {
  67                         fprintf (out, " %" PRIu64,
  68                                  timestamps[i].when - timestamps[i-1].when);
  69                 }
  70                 fputc ('\n', out);
  71         }
  72 }
  73
  74 void
  75 jack_reset_timestamps ()
  76 {
  77         timestamp_index = 0;
  78 }
  79