Add named pipe to control the order of two child process.

libsearch/file-utils.cpp

@@ -11,6 +11,8 @@
 #include <QMimeType>
 #include <QQueue>
 #include "uchardet/uchardet.h"
+
+
 size_t FileUtils::_max_index_count = 0;
 size_t FileUtils::_current_index_count = 0;
 unsigned short FileUtils::_index_status = INITIAL_STATE;

libsearch/file-utils.h

@@ -1,6 +1,12 @@
 #ifndef FILEUTILS_H
 #define FILEUTILS_H
 #include "gobject-template.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <QString>
 #include <QCryptographicHash>
 #include <QIcon>
@@ -10,6 +16,8 @@
 #define CREATING_INDEX 1
 #define FINISH_CREATING_INDEX 2
 
+#define UKUI_SEARCH_PIPE_PATH "/tmp/ukuisearch"
+
 
 class  LIBSEARCH_EXPORT FileUtils
 {

libsearch/index/first-index.cpp

@@ -63,6 +63,18 @@ void FirstIndex::DoSomething(const QFileInfo& fileInfo){
 }
 
 void FirstIndex::run(){
+    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);
+    }
+
     if (this->bool_dataBaseExist){
         if (this->bool_dataBaseStatusOK){
 
@@ -165,6 +177,14 @@ void FirstIndex::run(){
         waitpid(pid,NULL,0);
     }
 
+    int retval = write(fifo_fd, buffer, strlen(buffer));
+    if(retval == -1)
+    {
+        perror("write error\n");
+    }
+    printf("write data ok!\n");
+    close(fifo_fd);
+
     FileUtils::_index_status = FINISH_CREATING_INDEX;
 
     //quit() is shit!!!

libsearch/index/first-index.h

@@ -6,7 +6,12 @@
 #include <signal.h>
 #include <QSemaphore>
 #include<sys/types.h>
+#include <stdio.h>
 #include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <sys/wait.h>
 #include <sys/prctl.h>
 //#include <QtConcurrent>

libsearch/index/inotify-index.cpp

@@ -284,6 +284,30 @@ next:
 */
 
 void InotifyIndex::run(){
+    int fifo_fd;
+    char buffer[2];
+    memset(buffer, 0, sizeof(buffer));
+    fifo_fd = open(UKUI_SEARCH_PIPE_PATH, O_RDWR);
+    if(fifo_fd == -1)
+    {
+        perror("open fifo error\n");
+        assert(false);
+    }
+    int retval = read(fifo_fd, buffer, sizeof(buffer));
+    if(retval == -1)
+    {
+        perror("read error\n");
+        assert(false);
+    }
+    printf("read fifo=[%s]\n", buffer);
+
+    printf("read data ok\n");
+    close(fifo_fd);
+    if (buffer[0] & 0x1){
+        printf("data confirmed\n");
+    }
+    unlink(UKUI_SEARCH_PIPE_PATH);
+
     qDebug() << "sigset start!";
     sigset( SIGTERM, handler);
     qDebug() << "sigset end!";

src/main.cpp

@@ -26,7 +26,6 @@
 #include <X11/Xlib.h>
 #include <syslog.h>
 #include <QObject>
-#include <QSemaphore>
 #include "qt-single-application.h"
 #include "qt-local-peer.h"
 //#include "inotify-manager.h"
@@ -34,6 +33,7 @@
 #include "global-settings.h"
 #include "xatom-helper.h"
 
+
 void messageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
     QByteArray localMsg = msg.toLocal8Bit();
@@ -92,6 +92,17 @@ void centerToScreen(QWidget* widget) {
 
 int main(int argc, char *argv[])
 {
+    unlink(UKUI_SEARCH_PIPE_PATH);
+    int retval = mkfifo(UKUI_SEARCH_PIPE_PATH, 0777);
+    if(retval == -1)
+    {
+        perror("creat fifo error\n");
+        assert(false);
+        return -1;
+    }
+    printf("create fifo success\n");
+
+
     qInstallMessageHandler(messageOutput);
     qRegisterMetaType<QPair<QString,QStringList>>("QPair<QString,QStringList>");
     qRegisterMetaType<Document>("Document");