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Diffstat (limited to 'TAO/orbsvcs/orbsvcs/AV/ntp-time.h')
-rw-r--r-- | TAO/orbsvcs/orbsvcs/AV/ntp-time.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/TAO/orbsvcs/orbsvcs/AV/ntp-time.h b/TAO/orbsvcs/orbsvcs/AV/ntp-time.h new file mode 100644 index 00000000000..11dcd720911 --- /dev/null +++ b/TAO/orbsvcs/orbsvcs/AV/ntp-time.h @@ -0,0 +1,97 @@ +// -*- C++ -*- + +// $Id$ +/* + * Copyright (c) 1995 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the Network Research + * Group at Lawrence Berkeley National Laboratory. + * 4. Neither the name of the University nor of the Laboratory may be used + * to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef TAO_AV_NTP_TIME_H +#define TAO_AV_NTP_TIME_H +#include /**/ "ace/pre.h" + +#include "orbsvcs/AV/RTCP.h" + +/* + * convert microseconds to fraction of second * 2^32 (i.e., the lsw of + * a 64-bit ntp timestamp). This routine uses the factorization + * 2^32/10^6 = 4096 + 256 - 1825/32 which results in a max conversion + * error of 3 * 10^-7 and an average error of half that. + */ +ACE_INLINE u_int usec2ntp(u_int usec) +{ + u_int const t = (usec * 1825) >> 5; + return ((usec << 12) + (usec << 8) - t); +} + +/* + * Number of seconds between 1-Jan-1900 and 1-Jan-1970 + */ +const ACE_UINT32 GETTIMEOFDAY_TO_NTP_OFFSET = 2208988800U; + +/* + * Return a 64-bit ntp timestamp (UTC time relative to Jan 1, 1970). + * gettimeofday conveniently gives us the correct reference -- we just + * need to convert sec+usec to a 64-bit fixed point (with binary point + * at bit 32). + */ +ACE_INLINE TAO_AV_RTCP::ntp64 +ntp64time (timeval tv) +{ + TAO_AV_RTCP::ntp64 n; + n.upper = (u_int)tv.tv_sec + GETTIMEOFDAY_TO_NTP_OFFSET; + n.lower = usec2ntp((u_int)tv.tv_usec); + return (n); +} + +ACE_INLINE ACE_UINT32 +ntptime (timeval t) +{ + u_int s = (u_int)t.tv_sec + GETTIMEOFDAY_TO_NTP_OFFSET; + return (s << 16 | usec2ntp((u_int)t.tv_usec) >> 16); +} + +ACE_INLINE ACE_UINT32 +ntptime() +{ + // + ACE_Time_Value tim_v = ACE_OS::gettimeofday(); + //struct timeval tv = (timeval) tim_v; + return (ntptime ((timeval) tim_v)); +} + +ACE_INLINE timeval unixtime() +{ + ACE_Time_Value tv = ACE_OS::gettimeofday(); + return ((timeval) tv); +} +#include /**/ "ace/post.h" +#endif /* TAO_AV_NTP_TIME_H */ |