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/* Copyright 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
/**
* Inline function implementations for timers on systems that support the
* POSIX clock API and CLOCK_MONOTONIC clock.
*
* This file should only be included through timer-inl.h, which selects the
* particular implementation based on target platform.
*/
#define MONGO_TIMER_IMPL_POSIX_MONOTONIC_CLOCK
#include <ctime>
#include "mongo/util/assert_util.h"
namespace mongo {
unsigned long long Timer::now() const {
timespec the_time;
unsigned long long result;
fassert(16160, !clock_gettime(CLOCK_MONOTONIC, &the_time));
// Safe for 292 years after the clock epoch, even if we switch to a signed time value. On
// Linux, the monotonic clock's epoch is the UNIX epoch.
result = static_cast<unsigned long long>(the_time.tv_sec);
result *= nanosPerSecond;
result += static_cast<unsigned long long>(the_time.tv_nsec);
return result;
}
} // namespace mongo
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