Multiple QRegExp crashes when multithreading in KRunner

Thiago Macieira thiago at
Fri Jan 14 00:17:24 GMT 2011

On Thursday, 13 de January de 2011 23:33:14 Milian Wolff wrote:
> Matthias Fuchs, 13.01.2011:
> > Hi,
> > 
> > There are some crashes related to QRegExp and multithreading, so they
> > appear when using KRunner.
> QRegExp is not threadsafe, you either have to guard it with a mutex or make
> sure it's not shared between threads.

You're right.

To be clear: as per Qt terminology, QRegExp is reentrant, not thread-safe.

That means you can use QRegExp in different threads, at the same time, provided 
that they point to different objects. If it's the same object, do as Milian 

It's easier to just create a copy in this case.
Thiago Macieira - thiago (AT) - thiago (AT)
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
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