[Qt-interest] Fwd: QAtomicInt and QThread

[Francisco Gonzalez]

> From what I see, you're invoking the read() SLOT as a
> DirectConnection. This means that the slot will be invoked in the
> context of the main thread, NOT in the context of the other thread
> that you start.
Thanks, I do not know that. That explains the behavior. Since the
thread event loop is blocked by the loop function.
>
>> in the example?, and then, is it safe to read the m_count using the
>> read() slot from another thread
>> If not is it possible to use QAtomicInt to block the part of the code
>> that modifies the data?
>
> What you need for protecting the atomicity of read/write ops between
> threads is mutex. eg: you use QMutex from serializing access to the
> shared data.
Is it not enough to use a QAtomicInt? From the docs the "=" and "=="
operators seems to be atomic on QAtomicInt. So that way at least the
last example should work.
>
> HTH,
> -mandeep
>
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>