[QThread] QThread et QSharedMemory

salut j'ai essayé de communiquer 2 threads par l'intermédiaire d'une QSharedMemory :
Thread1 --> écrire dans le segment mémoire
Thread2 --> lire de ce segment
vu que chaque Thread est dans une classe différente!
voici le code :

Thread 1: (création et écriture)

Code:

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#include "thread.h"
 
#include <QtCore>
#include <QDebug>
 
Thread::Thread()
{
}
 
void Thread::run()
{
    qDebug() << this->name <<"Runned thread2 MSG!!!";
 
 
    QSharedMemory shared("memory");
    if(!shared.create(1024,QSharedMemory::ReadWrite))
    {
        qDebug() << "segment not be create!!!";
    }
    qDebug() << "segment created successfully";
    shared.lock();
    char *to = (char*)shared.data();
    char *text = "SND_SV1_LCH_DATA";
    memcpy(to, text, strlen(text)+1);
    shared.unlock();
    qDebug()<<"thread2 terminated";
 
}

Thread 2 :(lecture du segment)

Code:

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#include "mythread.h"
 
#include <QtCore>
#include <QDebug>
 
MyThread::MyThread()
{
 
}
 
void MyThread::run()
{
    qDebug() << this->name <<"Running ...";
    sleep(3);
    QSharedMemory shared("memory");
    shared.attach(QSharedMemory::ReadWrite);
    shared.lock();
    char *to = (char*)shared.data();
    qDebug() << "the content of segment is : " << to;
    shared.unlock();
 
    shared.detach();
    qDebug() << "segment is deleted";
 
}

la classe main:

Code:

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#include <QCoreApplication>
#include "mythread.h"
#include "thread.h"
 
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    MyThread mThread1;
    mThread1.name = "mThread1";
 
 
    Thread mThread2;
    mThread2.name = "mThread2";
 
    QMutex mutex;
    mutex.lock();
    mThread2.start();
    mutex.unlock();
 
    sleep(5);
 
    mutex.lock();
    mThread1.start();
    mutex.unlock();
 
 
    //mThread1.Stop = false;
 
 
    return a.exec();
}