libcruft-util/time.cpp

81 lines
1.7 KiB
C++

/*
* This file is part of libgim.
*
* libgim is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* libgim 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2010 Danny Robson <danny@nerdcruft.net>
*/
#include "time.hpp"
#include "debug.hpp"
#include "platform.hpp"
#include "types/casts.hpp"
using namespace util;
#ifdef PLATFORM_WIN32
#include <windows.h>
uint64_t
util::nanoseconds (void) {
LARGE_INTEGER freq, count;
QueryPerformanceFrequency (&freq);
QueryPerformanceCounter (&count);
return ((double)count.QuadPart / freq.QuadPart) * 1000000000UL;
}
void
util::sleep (uint64_t ns) {
static const uint64_t ns_in_ms = 1000000;
Sleep (ns / ns_in_ms);
}
#else
#include <ctime>
uint64_t
util::nanoseconds (void) {
struct timespec t;
clock_gettime (CLOCK_REALTIME, &t);
CHECK_SOFT (t.tv_sec > 0);
CHECK_SOFT (t.tv_nsec > 0);
return static_cast<uint64_t> (t.tv_sec) * 1000000000ULL + static_cast<uint64_t> (t.tv_nsec);
}
void
util::sleep (uint64_t ns) {
struct timespec req, rem;
req.tv_sec = sign_cast<time_t> (ns / 1000000000UL);
req.tv_nsec = sign_cast<long> (ns % 1000000000UL);
while (nanosleep (&req, &rem)) {
req = rem;
}
}
#endif