You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
2.1 KiB
69 lines
2.1 KiB
/*
|
|
* Copyright (C) 2021 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.
|
|
*/
|
|
|
|
#include "WorkerThread.h"
|
|
|
|
namespace aidl::android::hardware::biometrics::fingerprint {
|
|
|
|
// It's important that mThread is initialized after everything else because it runs a member
|
|
// function that may use any member of this class.
|
|
WorkerThread::WorkerThread(size_t maxQueueSize)
|
|
: mMaxSize(maxQueueSize),
|
|
mIsDestructing(false),
|
|
mQueue(),
|
|
mQueueMutex(),
|
|
mQueueCond(),
|
|
mThread(&WorkerThread::threadFunc, this) {}
|
|
|
|
WorkerThread::~WorkerThread() {
|
|
// This is a signal for threadFunc to terminate as soon as possible, and a hint for schedule
|
|
// that it doesn't need to do any work.
|
|
mIsDestructing = true;
|
|
mQueueCond.notify_all();
|
|
mThread.join();
|
|
}
|
|
|
|
bool WorkerThread::schedule(std::unique_ptr<Callable> task) {
|
|
if (mIsDestructing) {
|
|
return false;
|
|
}
|
|
|
|
std::unique_lock<std::mutex> lock(mQueueMutex);
|
|
if (mQueue.size() >= mMaxSize) {
|
|
return false;
|
|
}
|
|
mQueue.push_back(std::move(task));
|
|
lock.unlock();
|
|
mQueueCond.notify_one();
|
|
return true;
|
|
}
|
|
|
|
void WorkerThread::threadFunc() {
|
|
while (!mIsDestructing) {
|
|
std::unique_lock<std::mutex> lock(mQueueMutex);
|
|
mQueueCond.wait(lock, [this] { return !mQueue.empty() || mIsDestructing; });
|
|
if (mIsDestructing) {
|
|
return;
|
|
}
|
|
std::unique_ptr<Callable> task = std::move(mQueue.front());
|
|
mQueue.pop_front();
|
|
lock.unlock();
|
|
(*task)();
|
|
}
|
|
}
|
|
|
|
} // namespace aidl::android::hardware::biometrics::fingerprint
|