72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* Copyright 2016 Vincent Sanders <vince@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* BSD style timeval macros
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*
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* BSD added macros for manipulating timeval which have become standard on
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* modern c libraries but for compatability where they are missing it is
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* necessary to provide fallbacks.
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*/
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#ifndef NETSURF_UTILS_SYS_TIME_H_
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#define NETSURF_UTILS_SYS_TIME_H_
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#include <sys/time.h>
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#ifndef timerclear
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#define timerclear(a) ((a)->tv_sec = (a)->tv_usec = 0)
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#endif
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#ifndef timerisset
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#define timerisset(a) ((a)->tv_sec || (a)->tv_usec)
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#endif
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#ifndef timeradd
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#define timeradd(a, aa, result) \
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do { \
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(result)->tv_sec = (a)->tv_sec + (aa)->tv_sec; \
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(result)->tv_usec = (a)->tv_usec + (aa)->tv_usec; \
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if ((result)->tv_usec >= 1000000) { \
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++(result)->tv_sec; \
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(result)->tv_usec -= 1000000; \
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} \
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} while (0)
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#endif
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#ifndef timersub
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#define timersub(a, aa, result) \
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do { \
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(result)->tv_sec = (a)->tv_sec - (aa)->tv_sec; \
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(result)->tv_usec = (a)->tv_usec - (aa)->tv_usec; \
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if ((result)->tv_usec < 0) { \
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--(result)->tv_sec; \
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(result)->tv_usec += 1000000; \
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} \
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} while (0)
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#endif
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#ifndef timercmp
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#define timercmp(a, aa, cmp) \
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(((a)->tv_sec cmp (aa)->tv_sec) || \
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((a)->tv_sec == (aa)->tv_sec && (a)->tv_usec cmp (aa)->tv_usec))
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#endif
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#endif
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