code.delx.au - pulseaudio/blob - src/pulse/timeval.h

   1 #ifndef footimevalhfoo
   2 #define footimevalhfoo
   3
   4 /* $Id$ */
   5
   6 /***
   7   This file is part of PulseAudio.
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as
  11   published by the Free Software Foundation; either version 2.1 of the
  12   License, or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public
  20   License along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #include <pulse/cdecl.h>
  26 #include <pulse/sample.h>
  27
  28 /** \file
  29  * Utility functions for handling timeval calculations */
  30
  31 PA_C_DECL_BEGIN
  32
  33 struct timeval;
  34
  35 /** Return the current timestamp, just like UNIX gettimeofday() */
  36 struct timeval *pa_gettimeofday(struct timeval *tv);
  37
  38 /** Calculate the difference between the two specified timeval
  39  * structs. */
  40 pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b);
  41
  42 /** Compare the two timeval structs and return 0 when equal, negative when a < b, positive otherwse */
  43 int pa_timeval_cmp(const struct timeval *a, const struct timeval *b);
  44
  45 /** Return the time difference between now and the specified timestamp */
  46 pa_usec_t pa_timeval_age(const struct timeval *tv);
  47
  48 /** Add the specified time inmicroseconds to the specified timeval structure */
  49 struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v);
  50
  51 PA_C_DECL_END
  52
  53 #endif