Can't find linker symbol for virtual table for 'QMutexLocker' value

Jaron

I have a class which allows the user read/write access to a array.
mem.h
@
typedef std::auto_ptr<QByteArray> QByteArrayPtr;
class mem : public QObject
{
Q_OBJECT
public:
explicit mem(QObject *parent = 0) : QObject(parent ) {}
void CleanUp();

qint32 Write (const QByteArray pbuf);
QByteArrayPtr Read(const qint32 timeout = ULONG_MAX);

private:
QMutex mutex;
QWaitCondition cond;
QList<QByteArray*> pblock;// memory block

};
@

mem.c

@
void mem::CleanUp()
{
int size = 0;
int i;
QMutexLocker locker(&mutex);
size = pblock.size();
for (i=0;i<size;i++) {
QByteArray *pbuf = pblock.at(0);
pbuf->clear();
delete pbuf;
}
}

qint32 mem::Write(const QByteArray pbuf)
{
qint32 writebytes = 0;
QMutexLocker locker(&mutex);

if (pblock.size() >= 16) {
        return 0;
}

QByteArray *newpbuf = new QByteArray;
*newpbuf = pbuf;
pblock << newpbuf;
writebytes = pbuf.size();
cond.wakeOne();

return writebytes;

}

QByteArrayPtr mem::Read(const qint32 timeout)
{
QByteArrayPtr block;
QMutexLocker locker(&mutex);
if (pblock.size() == 0) {
cond.wait(locker.mutex(), timeout);
}

if (pblock.size() != 0) {
block.reset(pblock.at(0));
pblock.removeAt(0);
}
return block;
}
@

after saving the data into mem i try to read them. But i got the error
can't find linker symbol for virtual table for 'QMutexLocker' value
QMutex::lock: Deadlock detected in thread 368
Do you have any ideas where i do wrong?
Thank you

miroslav

Are those two errors from the same run? Because if the symbol cannot be found, that is (dynamic) link time error, while the error from QMutex::lock() is a runtime error.

If they are from the same run, it looks like your app is picking up a different Qt library than you link your project with.