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