MutliThread application and cuncurrent data access
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Hi all,
I have some doubts in multithread data access:- What does it happens if 2 threads read same data in memory without synchronization? does the application crash?
- What does it happens if 2 threads write data in the same memory area? does the application crash or I only get possible wrong data in the memory?
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Hi,
I recommend reading http://doc-snapshot.qt-project.org/qt5-stable/threads-synchronizing.html
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If the data is guarantee to not change while it's being read, this is fine. See the description for QReadWriteLock in the link above.
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You will probably get data corruption. Data corruption can cause crashes, or it can fail silently -- this depends on your code. Note: In these situations, crashes are good because they tell you that something is wrong. If your app DOESN'T crash, then you won't know if your data is destroyed.
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