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