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// FbTime.cc for FbTk - Fluxbox Toolkit
// Copyright (c) 2012 Mathias Gumz (akira at fluxbox dot org)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#include "FbTime.hh"
#ifdef HAVE_CLOCK_GETTIME // linux|*bsd|solaris
#include <time.h>
namespace {
uint64_t _now() {
uint64_t n = 0L;
timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0) {
n = (ts.tv_sec * FbTk::FbTime::IN_SECONDS) + (ts.tv_nsec / 1000L);
}
return n;
}
}
#endif // HAVE_CLOCK_GETTIME
#ifdef HAVE_MACH_ABSOLUTE_TIME // macosx
// http://stackoverflow.com/questions/5167269/clock-gettime-alternative-in-mac-os-x
// https://github.com/ThomasHabets/monotonic_clock/blob/master/src/monotonic_mach.c
// http://shiftedbits.org/2008/10/01/mach_absolute_time-on-the-iphone/
#include <mach/mach_time.h>
namespace {
uint64_t _now() {
// mach_absolute_time() * info.numer / info.denom yields
// nanoseconds.
static double micro_scale = 0.001; // 1000ms == 1ns
static bool initial = true;
if (initial) {
initial = false;
mach_timebase_info_data_t info;
if (mach_timebase_info(&info) == 0) {
micro_scale *= static_cast<double>info.numer / static_cast<double>(info.denom);
}
}
return static_cast<uint64_t>(mach_absolute_time() * micro_scale);
}
}
#endif // HAVE_MACH_ABSOLUTE_TIME
uint64_t FbTk::FbTime::now() {
return ::_now();
}
uint64_t FbTk::FbTime::remainingNext(uint64_t unit) {
return (unit - (::_now() % unit) - 1);
}
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