132 rader
3.1 KiB
C++
132 rader
3.1 KiB
C++
#include "paralleldirscanner.h"
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#include <QRunnable>
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#include <QMutex>
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#include <QDirIterator>
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#include <QThread>
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#include <QThreadPool>
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#include <functional>
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#include "dirscanworker.h"
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#include "logger.h"
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ParallelDirScanner::ParallelDirScanner()
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{
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this->threadpool.setMaxThreadCount(QThread::idealThreadCount() / 2);
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}
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ConcurrentQueue<QString> &ParallelDirScanner::getResults()
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{
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return this->resultPathsQueue;
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}
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void ParallelDirScanner::setIgnorePatterns(QStringList patterns)
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{
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this->ignorePatterns = patterns;
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}
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void ParallelDirScanner::setPaths(QVector<QString> paths)
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{
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this->paths = paths;
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}
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void ParallelDirScanner::cancel()
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{
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this->stopToken.store(true, std::memory_order_seq_cst);
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}
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void ParallelDirScanner::handleWorkersProgress(unsigned int progress)
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{
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this->processedPaths += progress;
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if(!this->stopToken.load(std::memory_order_seq_cst))
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emit this->progress(progress, this->processedPaths);
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}
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void ParallelDirScanner::handleWorkersFinish()
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{
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// no mutexes required due to queued connection
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++finishedWorkers;
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if(this->stopToken.load(std::memory_order_seq_cst) || finishedWorkers == getThreadsNum())
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{
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running = false;
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emit scanComplete();
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}
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delete QObject::sender();
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}
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unsigned int ParallelDirScanner::getThreadsNum() const
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{
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int threadsNum = this->threadpool.maxThreadCount();
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if(threadsNum > this->paths.size())
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{
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threadsNum = this->paths.size();
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}
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return threadsNum;
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}
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void ParallelDirScanner::scan()
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{
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this->stopToken.store(false, std::memory_order_relaxed);
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this->finishedWorkers = 0;
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this->processedPaths = 0;
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this->targetPathsQueue.clear();
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this->resultPathsQueue.clear();
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/* First scan without subdirs. This way we collect paths for the threads */
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WildcardMatcher matcher;
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matcher.setPatterns(this->ignorePatterns);
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for(QString &path : this->paths)
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{
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QDirIterator iterator(path, QStringList{}, QDir::Dirs | QDir::QDir::Files | QDir::NoDotAndDotDot);
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while(iterator.hasNext())
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{
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QString path = iterator.next();
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if(matcher.match(path))
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{
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continue;
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}
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QFileInfo info = iterator.fileInfo();
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if(!info.isSymLink())
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{
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if(info.isDir())
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{
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this->targetPathsQueue.enqueue(info.absoluteFilePath());
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}
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else
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{
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this->resultPathsQueue.enqueue(info.absoluteFilePath());
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this->processedPaths += 1;
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}
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}
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}
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}
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emit this->progress(this->processedPaths, this->processedPaths);
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int threadsNum = getThreadsNum();
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if(threadsNum == 0)
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{
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emit scanComplete();
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return;
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}
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running = true;
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for(int i = 0; i < threadsNum; i++)
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{
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DirScanWorker *runnable = new DirScanWorker(this->targetPathsQueue, this->resultPathsQueue,
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this->ignorePatterns, 1000, this->stopToken);
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runnable->setAutoDelete(false);
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connect(runnable, &DirScanWorker::progress, this, &ParallelDirScanner::handleWorkersProgress,
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Qt::QueuedConnection);
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connect(runnable, &DirScanWorker::finished, this, &ParallelDirScanner::handleWorkersFinish,
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Qt::QueuedConnection);
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threadpool.start(runnable);
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}
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}
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bool ParallelDirScanner::isRunning()
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{
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return this->running;
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}
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unsigned int ParallelDirScanner::pathCount()
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{
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return this->processedPaths;
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}
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