使用信号量控制进程顺序，规避由于首次索引时间过长导致inotify队列过长问题。

libsearch/common.h

@@ -8,6 +8,7 @@
 #define DIR_SEARCH_VALUE "1"
 #define LABEL_MAX_WIDTH 300
 #define HOME_PATH QDir::homePath()
+#define INDEX_SEM "ukui-search-index-sem"
 static const QStringList allAppPath = {
     QDir::homePath()+"/.local/share/applications/",
     "/usr/share/applications/"

libsearch/index/first-index.cpp

@@ -23,14 +23,23 @@
 #include "dir-watcher.h"
 #include <QDebug>
 
-#define NEW_QUEUE(a) a = new QQueue<QString>(); qDebug("---------------------------%s %s %s new at %d..",__FILE__,__FUNCTION__,#a,__LINE__);
-//#define DELETE_QUEUE(a )
 using namespace UkuiSearch;
-FirstIndex::FirstIndex() {
+FirstIndex *FirstIndex::m_instance = nullptr;
+std::once_flag g_firstIndexInstanceFlag;
+FirstIndex::FirstIndex() : m_semaphore(INDEX_SEM, 1, QSystemSemaphore::AccessMode::Open)
+{
     m_pool.setMaxThreadCount(2);
     m_pool.setExpiryTimeout(100);
 }
 
+FirstIndex *FirstIndex::getInstance()
+{
+    std::call_once(g_firstIndexInstanceFlag, [] () {
+        m_instance = new FirstIndex;
+    });
+    return m_instance;
+}
+
 FirstIndex::~FirstIndex() {
     qDebug() << "~FirstIndex";
     if(this->q_index)
@@ -127,17 +136,6 @@ void FirstIndex::run() {
     this->q_content_index = new QQueue<QPair<QString,qint64>>();
     this->m_ocr_index = new QQueue<QPair<QString,qint64>>();
 
-    int fifo_fd;
-    char buffer[2];
-    memset(buffer, 0, sizeof(buffer));
-    buffer[0] = 0x1;
-    buffer[1] = '\0';
-    fifo_fd = open(UKUI_SEARCH_PIPE_PATH, O_RDWR);
-    if(fifo_fd == -1) {
-        perror("open fifo error\n");
-        assert(false);
-    }
-
     ++FileUtils::indexStatus;
     pid_t pid;
     pid = fork();
@@ -161,23 +159,18 @@ void FirstIndex::run() {
         QMutex mutex1, mutex2, mutex3;
         mutex1.lock();
         mutex2.lock();
-        mutex3.lock();
-        sem.acquire(4);
-        sem.acquire(1);
-        mutex1.unlock();
 
         qInfo() << "index dir" << DirWatcher::getDirWatcher()->currentindexableDir();
         qInfo() << "index block dir" << DirWatcher::getDirWatcher()->currentBlackListOfIndex();
         setPath(DirWatcher::getDirWatcher()->currentindexableDir());
         setBlockPath(DirWatcher::getDirWatcher()->currentBlackListOfIndex());
-        Traverse();
+        this->Traverse();
 
         FileUtils::_max_index_count = this->q_index->length();
         qDebug() << "max_index_count:" << FileUtils::_max_index_count;
-        sem.release(5);
         QtConcurrent::run(&m_pool, [&]() {
             sem.acquire(2);
-            mutex2.unlock();
+            mutex1.unlock();
             qDebug() << "index start;";
             QQueue<QVector<QString>>* tmp1 = new QQueue<QVector<QString>>();
             while(!this->q_index->empty()) {
@@ -193,7 +186,7 @@ void FirstIndex::run() {
         });
         QtConcurrent::run(&m_pool,[&]() {
             sem.acquire(2);
-            mutex3.unlock();
+            mutex2.unlock();
             QQueue<QString>* tmp2 = new QQueue<QString>();
             qDebug() << "q_content_index:" << q_content_index->size();
             while(!this->q_content_index->empty()) {
@@ -220,9 +213,10 @@ void FirstIndex::run() {
             qDebug() << "content index end;";
             sem.release(2);
         });
-        //OCR功能暂时屏蔽
+//        OCR功能暂时屏蔽
 //        QtConcurrent::run(&m_pool,[&]() {
 //            sem.acquire(5);
+//            mutex3.unlock();
 //            QQueue<QString>* tmpOcr = new QQueue<QString>();
 //            qDebug() << "m_ocr_index:" << m_ocr_index->size();
 //            while(!this->m_ocr_index->empty()) {
@@ -250,11 +244,11 @@ void FirstIndex::run() {
 //        });
         mutex1.lock();
         mutex2.lock();
-        mutex3.lock();
+//        mutex3.lock();
         sem.acquire(5);
         mutex1.unlock();
         mutex2.unlock();
-        mutex3.unlock();
+//        mutex3.unlock();
 
         if(this->q_index)
             delete this->q_index;
@@ -279,12 +273,13 @@ void FirstIndex::run() {
         --FileUtils::indexStatus;
     }
 
+    m_semaphore.release(1);
     IndexStatusRecorder::getInstance()->setStatus(INOTIFY_NORMAL_EXIT, "2");
-    int retval1 = write(fifo_fd, buffer, strlen(buffer));
-    if(retval1 == -1) {
-        qWarning("write error\n");
-    }
-    qDebug("write data ok!\n");
+//    int retval1 = write(fifo_fd, buffer, strlen(buffer));
+//    if(retval1 == -1) {
+//        qWarning("write error\n");
+//    }
+//    qDebug("write data ok!\n");
     QTime t2 = QTime::currentTime();
     qWarning() << t1;
     qWarning() << t2;

libsearch/index/first-index.h

@@ -25,6 +25,7 @@
 #include <QtConcurrent/QtConcurrent>
 #include <signal.h>
 #include <QSemaphore>
+#include <QSystemSemaphore>
 #include<sys/types.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -43,14 +44,16 @@
 namespace UkuiSearch {
 class FirstIndex : public QThread, public Traverse_BFS {
 public:
-    FirstIndex();
+    static FirstIndex* getInstance();
     ~FirstIndex();
     virtual void DoSomething(const QFileInfo &) final;
 protected:
     void run() override;
 private:
+    FirstIndex();
     FirstIndex(const FirstIndex&) = delete;
     void operator=(const FirstIndex&) = delete;
+    static FirstIndex *m_instance;
     bool bool_dataBaseStatusOK = false;
     bool bool_dataBaseExist = false;
     IndexGenerator* p_indexGenerator = nullptr;
@@ -64,6 +67,8 @@ private:
     QQueue<QPair<QString,qint64>>* m_ocr_index;
     //xapian will auto commit per 10,000 changes, donnot change it!!!
     const size_t u_send_length = 8192;
+    QSystemSemaphore m_semaphore;
+
 };
 }
 

libsearch/index/inotify-watch.cpp

@@ -175,28 +175,6 @@ void InotifyWatch::run()
     setBlockPath(DirWatcher::getDirWatcher()->currentBlackListOfIndex());
     firstTraverse();
 
-    int fifo_fd;
-    char buffer[2];
-    memset(buffer, 0, sizeof(buffer));
-    fifo_fd = open(UKUI_SEARCH_PIPE_PATH, O_RDWR);
-    if(fifo_fd == -1) {
-        qWarning() << "Open fifo error\n";
-        assert(false);
-    }
-    int retval = read(fifo_fd, buffer, sizeof(buffer));
-    if(retval == -1) {
-        qWarning() << "read error\n";
-        assert(false);
-    }
-    qDebug("Read fifo[%s]", buffer);
-
-    qDebug("Read data ok");
-    close(fifo_fd);
-    if(buffer[0] & 0x1) {
-        qDebug("Data confirmed\n");
-    }
-    unlink(UKUI_SEARCH_PIPE_PATH);
-
     while(FileUtils::SearchMethod::INDEXSEARCH == FileUtils::searchMethod) {
         fd_set fds;
         FD_ZERO(&fds);

libsearch/index/inotify-watch.h

@@ -2,17 +2,20 @@
 #define INOTIFYWATCH_H
 
 #include <QThread>
-#include <unistd.h>
-#include <sys/inotify.h>
+#include <QBuffer>
 #include <QSocketNotifier>
 #include <QDataStream>
 #include <QSharedMemory>
 
+#include <sys/prctl.h>
+#include <sys/wait.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+
 #include "traverse_bfs.h"
 #include "ukui-search-qdbus.h"
 #include "index-status-recorder.h"
 #include "file-utils.h"
-#include "first-index.h"
 #include "pending-file-queue.h"
 #include "common.h"
 namespace UkuiSearch {
@@ -21,7 +24,6 @@ class InotifyWatch : public QThread, public Traverse_BFS
     Q_OBJECT
 public:
     static InotifyWatch* getInstance();
-
     bool addWatch(const QString &path);
     bool removeWatch(const QString &path, bool removeFromDatabase = true);
     virtual void DoSomething(const QFileInfo &info) final;

libsearch/index/pending-file-queue.cpp

@@ -22,7 +22,7 @@
 #include <malloc.h>
 using namespace UkuiSearch;
 static PendingFileQueue *global_instance_pending_file_queue = nullptr;
-PendingFileQueue::PendingFileQueue(QObject *parent) : QThread(parent)
+PendingFileQueue::PendingFileQueue(QObject *parent) : QThread(parent), m_semaphore(INDEX_SEM, 0, QSystemSemaphore::AccessMode::Open)
 {
     this->start();
 
@@ -72,10 +72,11 @@ PendingFileQueue::~PendingFileQueue()
 
 void PendingFileQueue::forceFinish()
 {
-    QThread::msleep(600);
     Q_EMIT timerStop();
     this->quit();
     this->wait();
+    processCache();
+    m_semaphore.release(1);
 }
 void PendingFileQueue::enqueue(const PendingFile &file)
 {
@@ -128,6 +129,8 @@ void PendingFileQueue::enqueue(const PendingFile &file)
 
 void PendingFileQueue::run()
 {
+    //阻塞线程直到first-index进程结束
+    m_semaphore.acquire();
     exec();
 }
 

libsearch/index/pending-file-queue.h

@@ -25,6 +25,7 @@
 #include <QTimer>
 #include <QThread>
 #include <QMutex>
+#include <QSystemSemaphore>
 #include "pending-file.h"
 #include "index-generator.h"
 
@@ -57,6 +58,7 @@ private:
     QVector<PendingFile> m_pendingFiles;
     QMutex m_mutex;
     QMutex m_timeoutMutex;
+    QSystemSemaphore m_semaphore;
 
     QThread *m_timerThread = nullptr;
     bool m_timeout = false;

libsearch/index/search-method-manager.cpp

@@ -1,12 +1,11 @@
 #include "search-method-manager.h"
-#include "dir-watcher.h"
 using namespace UkuiSearch;
 static SearchMethodManager* global_instance = nullptr;
-
-SearchMethodManager::SearchMethodManager()
+SearchMethodManager::SearchMethodManager() : m_semaphore(INDEX_SEM, 1, QSystemSemaphore::AccessMode::Create)
 {
+    qDebug() << m_semaphore.errorString();
+    m_fi = FirstIndex::getInstance();
     m_iw = InotifyWatch::getInstance();
-
 }
 
 SearchMethodManager *SearchMethodManager::getInstance()
@@ -41,7 +40,8 @@ void SearchMethodManager::searchMethod(FileUtils::SearchMethod sm) {
         }
         qDebug() << "create fifo success\n";
         qWarning() << "start first index";
-        m_fi.start();
+        m_semaphore.acquire();
+        m_fi->start();
         qWarning() << "start inotify index";
 //        InotifyIndex ii("/home");
 //        ii.start();

libsearch/index/search-method-manager.h

@@ -1,6 +1,7 @@
 #ifndef SEARCHMETHODMANAGER_H
 #define SEARCHMETHODMANAGER_H
 
+#include <QSystemSemaphore>
 #include "first-index.h"
 //#include "inotify-index.h"
 #include "inotify-watch.h"
@@ -11,9 +12,10 @@ public:
     void searchMethod(FileUtils::SearchMethod sm);
 private:
     SearchMethodManager();
-    FirstIndex m_fi;
+    FirstIndex *m_fi;
 //    InotifyIndex* m_ii;
     InotifyWatch *m_iw = nullptr;
+    QSystemSemaphore m_semaphore;
 };
 }