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Asked: 2026-06-01T15:07:37+00:00

I need a cross-platform solution for multi-thread to write to a same file concurrently

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I need a cross-platform solution for multi-thread to write to a same file concurrently, at least Windows and Mac OS X. Different thread write to different file region.

The file is a little large. May be several GB or several hundred MB. So MMF doesn’t fit right.

QFile is a cross-platform overlap. I have searched the QFile document, there isn’t a share write option.

Under Windows, this can be done by CreateFile using FILE_SHARE_WRITE option. What about Mac OS X?

Does Qt support this or I should do my own encapsulation? How to do this under Mac OS X?

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1 Answer

  1. Editorial Team

    You could use QFile with a QReadWriteLock (documentation).

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