#StackBounty: #android #ios #file #io #operating-system How can I read & write one file at same time by different threads on Androi…

Bounty: 50

I have lots of small files. To save file handles and improve IO efficiency, these files are packed into a big single file. However, for some reason, these small files should be able to update in runtime. So Updating and reading different parts of a big single file at the same time by different threads is required.

Because of the memory limit, mmap is not a good choice. I have to implement it by myself. But I’m concerned about is it safe to read and write different parts of a single file at the same time on iOS/Android. How can I make sure the block which is being writing will not read by other thread.

Should I implement the whole feature by thread locks or there has been some mature technic to do the same work?

Get this bounty!!!

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