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Filename : timestamp_gtod.stp
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// timestamp tapset -- gettimeofday variants
// Copyright (C) 2005-2009 Red Hat Inc.
// Copyright (C) 2006 Intel Corporation.
//
// This file is part of systemtap, and is free software.  You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.

%{
#define STAP_NEED_GETTIMEOFDAY 1
%}


/**
 * sfunction gettimeofday_ns - Number of nanoseconds since UNIX epoch
 *
 * Description: This function returns the number of nanoseconds
 * since the UNIX epoch.
 */
function gettimeofday_ns:long () %{ /* pure */ /* unprivileged */
  /* NOTE: we can't use do_gettimeofday because we could be called from a
   * context where xtime_lock is already held.  See bug #2525. */
  STAP_RETVALUE = _stp_gettimeofday_ns();
  if (STAP_RETVALUE < 0)
    CONTEXT->last_error = "gettimeofday not initialized";
%}

/**
 * sfunction gettimeofday_us - Number of microseconds since UNIX epoch
 *
 * Description: This function returns the number of microseconds
 * since the UNIX epoch.
 */
function gettimeofday_us:long () {
  return gettimeofday_ns() / 1000;
}

/**
 * sfunction gettimeofday_ms - Number of milliseconds since UNIX epoch
 *
 * Description: This function returns the number of milliseconds
 * since the UNIX epoch.
 */
function gettimeofday_ms:long () {
  return gettimeofday_ns() / 1000000;
}

/**
 * sfunction gettimeofday_s - Number of seconds since UNIX epoch
 *
 * Description: This function returns the number of seconds since
 * the UNIX epoch.
 */
function gettimeofday_s:long () {
  return gettimeofday_ns() / 1000000000;
}