CODEWITHSUNDEEP
c++windowsfileqt5
abdolahS
abdolahS

Reputation: 683

How to know when writing a file has been finished?

I'm writing a program which operates on a file (only reads the file), while another program is writing that file (I've no control over it to use events and I don't know the content of the file). I want a way to know when that program finished writing, to stop my program operating on the file. I used these two method but I don't know which one is reliable and more performance:

1- renaming file to another name, if success, rename it to original name.

2-flush file , if file size has not been changed for a while (e.g 5 sec) then stop operation.

which one is better? is there any better way (more reliable and more performance)?

I'm using windows 7 and qt5.2(or visual studio) for c++.

Upvotes: 0

Views: 271

Answers (1)

GingerJack
GingerJack

Reputation: 3134

Qt provides a class called QFileSystemWatcher which allows you to monitor files and directories.

Upvotes: 1

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