timer_compat.h
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/*
* (C) 2011 Sylvain Munaut <tnt@246tNt.com>
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#pragma once
/* Convenience macros for operations on timevals.
NOTE: `timercmp' does not work for >= or <=. */
#ifndef timerisset
# define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#endif
#ifndef timerclear
# define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#endif
#ifndef timercmp
# define timercmp(a, b, CMP) \
(((a)->tv_sec == (b)->tv_sec) ? \
((a)->tv_usec CMP (b)->tv_usec) : \
((a)->tv_sec CMP (b)->tv_sec))
#endif
#ifndef timeradd
# define timeradd(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \
if ((result)->tv_usec >= 1000000) \
{ \
++(result)->tv_sec; \
(result)->tv_usec -= 1000000; \
} \
} while (0)
#endif
#ifndef timersub
# define timersub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((result)->tv_usec < 0) { \
--(result)->tv_sec; \
(result)->tv_usec += 1000000; \
} \
} while (0)
#endif
/* Convenience macros for operations on timespecs.
NOTE: `timercmp' does not work for >= or <=. */
#ifndef timespecisset
# define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
#endif
#ifndef timespecclear
# define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
#endif
#ifndef timespeccmp
# define timespeccmp(a, b, CMP) \
(((a)->tv_sec == (b)->tv_sec) ? \
((a)->tv_nsec CMP (b)->tv_nsec) : \
((a)->tv_sec CMP (b)->tv_sec))
#endif
#ifndef timespecadd
# define timespecadd(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \
(result)->tv_nsec = (a)->tv_nsec + (b)->tv_nsec; \
if ((result)->tv_nsec >= 1000000000) \
{ \
++(result)->tv_sec; \
(result)->tv_nsec -= 1000000000; \
} \
} while (0)
#endif
#ifndef timespecsub
# define timespecsub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_nsec = (a)->tv_nsec - (b)->tv_nsec; \
if ((result)->tv_nsec < 0) { \
--(result)->tv_sec; \
(result)->tv_nsec += 1000000000; \
} \
} while (0)
#endif