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/*
* Written by Thomas Tsou <ttsou@vt.edu>
* Based on code by Harvind S Samra <hssamra@kestrelsp.com>
*
* Copyright 2011 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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/>.
* See the COPYING file in the main directory for details.
*/
#include "radioClock.h"
void RadioClock::set(const GSM::Time& wTime)
{
mLock.lock();
mClock = wTime;
updateSignal.signal();
mLock.unlock();
}
void RadioClock::adjust(GSM::Time& wOffset)
{
int tn_diff, fn_diff = 0;
mLock.lock();
/* Modulo TN adustment */
tn_diff = mClock.TN() + wOffset.TN();
if (tn_diff < 0) {
tn_diff += 8;
fn_diff--;
} else if (tn_diff >= 8) {
tn_diff -= 8;
fn_diff++;
}
/* Modulo FN adjustment */
fn_diff += mClock.FN() + wOffset.FN();
if (fn_diff < 0)
fn_diff += GSM::gHyperframe;
else if ((unsigned) fn_diff >= GSM::gHyperframe)
fn_diff = fn_diff - GSM::gHyperframe;
mClock = GSM::Time(fn_diff, tn_diff);
updateSignal.signal();
mLock.unlock();
}
void RadioClock::incTN()
{
mLock.lock();
mClock.incTN();
updateSignal.signal();
mLock.unlock();
}
GSM::Time RadioClock::get()
{
mLock.lock();
GSM::Time retVal = mClock;
mLock.unlock();
return retVal;
}
void RadioClock::wait()
{
mLock.lock();
updateSignal.wait(mLock,1);
mLock.unlock();
}
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