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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Asynchronous interval timer.
*/
#include "IntervalTimer.h"
#include "OverrideLog.h"
IntervalTimer::IntervalTimer()
{
mTimerId = NULL;
mCb = NULL;
}
bool IntervalTimer::set(int ms, TIMER_FUNC cb)
{
if (mTimerId == NULL)
{
if (cb == NULL)
return false;
if (!create(cb))
return false;
}
if (cb != mCb)
{
kill();
if (!create(cb))
return false;
}
int stat = 0;
struct itimerspec ts;
ts.it_value.tv_sec = ms / 1000;
ts.it_value.tv_nsec = (ms % 1000) * 1000000;
ts.it_interval.tv_sec = 0;
ts.it_interval.tv_nsec = 0;
stat = timer_settime(mTimerId, 0, &ts, 0);
if (stat == -1)
ALOGE("IntervalTimer::set: fail set timer");
return stat == 0;
}
IntervalTimer::~IntervalTimer()
{
kill();
}
void IntervalTimer::kill()
{
if (mTimerId == NULL)
return;
timer_delete(mTimerId);
mTimerId = NULL;
mCb = NULL;
}
bool IntervalTimer::create(TIMER_FUNC cb)
{
struct sigevent se;
int stat = 0;
/*
* Set the sigevent structure to cause the signal to be
* delivered by creating a new thread.
*/
se.sigev_notify = SIGEV_THREAD;
se.sigev_value.sival_ptr = &mTimerId;
se.sigev_notify_function = cb;
se.sigev_notify_attributes = NULL;
mCb = cb;
stat = timer_create(CLOCK_MONOTONIC, &se, &mTimerId);
if (stat == -1)
ALOGE("IntervalTimer::create: fail create timer");
return stat == 0;
}
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