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98 lines
2.6 KiB
98 lines
2.6 KiB
/*
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* Copyright (C) 2017 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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#include "ALooper.h"
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#include "ASensorEventQueue.h"
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#define LOG_TAG "libsensorndkbridge"
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#include <android/looper.h>
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#include <android-base/logging.h>
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using android::Mutex;
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using android::sp;
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using android::wp;
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ALooper::ALooper()
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: mAwoken(false) {
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}
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void ALooper::signalSensorEvents(wp<ASensorEventQueue> queue) {
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Mutex::Autolock autoLock(mLock);
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mReadyQueues.insert(queue);
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mCondition.signal();
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}
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void ALooper::wake() {
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Mutex::Autolock autoLock(mLock);
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mAwoken = true;
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mCondition.signal();
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}
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int ALooper::pollOnce(
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int timeoutMillis, int *outFd, int *outEvents, void **outData) {
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if (outFd) { *outFd = 0; }
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if (outEvents) { *outEvents = 0; }
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if (outData) { *outData = NULL; }
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int64_t waitUntilNs;
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if (timeoutMillis < 0) {
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waitUntilNs = -1;
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} else {
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waitUntilNs = systemTime(SYSTEM_TIME_MONOTONIC) + timeoutMillis * 1000000LL;
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}
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Mutex::Autolock autoLock(mLock);
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int64_t nowNs;
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while ((timeoutMillis < 0
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|| (nowNs = systemTime(SYSTEM_TIME_MONOTONIC)) < waitUntilNs)
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&& mReadyQueues.empty()
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&& !mAwoken) {
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if (timeoutMillis < 0) {
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mCondition.wait(mLock);
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} else {
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mCondition.waitRelative(mLock, waitUntilNs - nowNs);
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}
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}
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int result = ALOOPER_POLL_TIMEOUT;
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if (!mReadyQueues.empty()) {
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result = ALOOPER_POLL_CALLBACK;
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for (auto& queue : mReadyQueues) {
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sp<ASensorEventQueue> promotedQueue = queue.promote();
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if (promotedQueue != nullptr) {
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promotedQueue->dispatchCallback();
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}
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}
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mReadyQueues.clear();
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} else if (mAwoken) {
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result = ALOOPER_POLL_WAKE;
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mAwoken = false;
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}
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LOG(VERBOSE) << "pollOnce returning " << result;
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return result;
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}
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void ALooper::invalidateSensorQueue(wp<ASensorEventQueue> queue) {
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Mutex::Autolock autoLock(mLock);
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mReadyQueues.erase(queue);
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}
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