53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
/*
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* \brief Time source that uses sleeping by the means of the kernel
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* \author Norman Feske
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* \author Martin Stein
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* \date 2006-08-15
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*/
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/*
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* Copyright (C) 2006-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Linux includes */
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#include <linux_syscalls.h>
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#include <sys/time.h>
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/* local includes */
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#include <time_source.h>
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using namespace Genode;
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inline int lx_gettimeofday(struct timeval *tv, struct timeval *tz) {
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return lx_syscall(SYS_gettimeofday, tv, tz); }
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Microseconds Timer::Time_source::max_timeout() const
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{
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Lock::Guard lock_guard(_lock);
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return Microseconds(1000 * 1000);
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}
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Duration Timer::Time_source::curr_time()
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{
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struct timeval tv;
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lx_gettimeofday(&tv, 0);
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return Duration(Microseconds((uint64_t)tv.tv_sec * 1000 * 1000 + tv.tv_usec));
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}
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void Timer::Time_source::_usleep(uint64_t us)
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{
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struct timespec ts;
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ts.tv_sec = us / (1000 * 1000);
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ts.tv_nsec = (us % (1000 * 1000)) * 1000;
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if (lx_nanosleep(&ts, &ts) != 0)
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throw Blocking_canceled();
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}
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