VG3_time_delta()

[added in version 1.5]

Return the time-difference in milliseconds since last call.

SYNTAX

long VG3_time_delta(long *tlast)

FUNCTION PARAMETERS

tlast

Address to last time of call, will be updated

RETURN VALUE

Returns the time-difference.

DESCRIPTION

Return the time-difference in milliseconds since last call. At first call the parameter tlast should have the value 0. At the next calls the parameter tlast must just be passed, and the time in milliseconds since the last call will be returned.

EXAMPLE

  long tlast, tdiff;

  /* initialize tlast */
  tlast = 0;

  /* check how long function1() needs */
  VG3_time_delta(&tlast);
  function1();
  tdiff = VG3_time_delta(&tlast);

  /* do something else */

  /* check how long function2() needs */
  VG3_time_delta(&tlast);
  function2();
  tdiff = VG3_time_delta(&tlast);