e29d376df0
The new methods are slightly more efficient for updating an existing Timespec instance than creating a temporary instance and assigning that.
81 lines
3.2 KiB
C++
81 lines
3.2 KiB
C++
/*
|
|
* 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; }
|
|
|
|
void resetMonotonic() { clock_gettime(CLOCK_MONOTONIC, this); }
|
|
void resetSystem() { clock_gettime(CLOCK_REALTIME, this); }
|
|
};
|
|
|
|
SE_END_CXX
|
|
#endif // INCL_SYNCEVOLUTION_TIME
|