c962577303
Split Timespec class out of util.h into its own Timespec.h so that Logging.h can use it (next patch). Otherwise there would be a circular dependency between Logging.h and util.h.
77 lines
3 KiB
C++
77 lines
3 KiB
C++
/*
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* Copyright (C) 2008-2009 Patrick Ohly <patrick.ohly@gmx.de>
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* Copyright (C) 2009 Intel Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) version 3.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef INCL_SYNCEVOLUTION_TIME
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# define INCL_SYNCEVOLUTION_TIME
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#include <time.h>
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#include <sys/types.h>
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#include <sys/select.h>
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#include <unistd.h>
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#include <syncevo/declarations.h>
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SE_BEGIN_CXX
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/**
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* Sub-second time stamps. Thin wrapper around timespec
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* and clock_gettime() (for monotonic time). Comparisons
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* assume normalized values (tv_nsec >= 0, < 1e9). Addition
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* and substraction produce normalized values, as long
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* as the result is positive. Substracting a - b where a < b
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* leads to an undefined result.
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*/
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class Timespec : public timespec
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{
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public:
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Timespec() { tv_sec = 0; tv_nsec = 0; }
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Timespec(time_t sec, long nsec) { tv_sec = sec; tv_nsec = nsec; }
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bool operator < (const Timespec &other) const {
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return tv_sec < other.tv_sec ||
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(tv_sec == other.tv_sec && tv_nsec < other.tv_nsec);
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}
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bool operator > (const Timespec &other) const {
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return tv_sec > other.tv_sec ||
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(tv_sec == other.tv_sec && tv_nsec > other.tv_nsec);
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}
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bool operator <= (const Timespec &other) const { return !(*this > other); }
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bool operator >= (const Timespec &other) const { return !(*this < other); }
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operator bool () const { return tv_sec || tv_nsec; }
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Timespec operator + (int seconds) const { return Timespec(tv_sec + seconds, tv_nsec); }
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Timespec operator - (int seconds) const { return Timespec(tv_sec - seconds, tv_nsec); }
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Timespec operator + (unsigned seconds) const { return Timespec(tv_sec + seconds, tv_nsec); }
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Timespec operator - (unsigned seconds) const { return Timespec(tv_sec - seconds, tv_nsec); }
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Timespec operator + (const Timespec &other) const;
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Timespec operator - (const Timespec &other) const;
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operator timeval () const { timeval res; res.tv_sec = tv_sec; res.tv_usec = tv_nsec / 1000; return res; }
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time_t seconds() const { return tv_sec; }
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long nsecs() const { return tv_nsec; }
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double duration() const { return (double)tv_sec + ((double)tv_nsec) / 1e9; }
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static Timespec monotonic() { Timespec res; clock_gettime(CLOCK_MONOTONIC, &res); return res; }
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static Timespec system() { Timespec res; clock_gettime(CLOCK_REALTIME, &res); return res; }
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};
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SE_END_CXX
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#endif // INCL_SYNCEVOLUTION_TIME
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